Dell PowerSwitch S6010-ON User Manual

Dell Con€guration Guide for the S6010–ON System

9.14.0.0

Notes, cautions, and warnings

NOTE: A NOTE indicates important information that helps you make better use of your product.

CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem. WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

Copyright © 2018 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.

2018 - 07

Rev. A00

Contents

1 About this Guide...........................................................................................................................................	36
Audience...........................................................................................................................................................................	36
Conventions......................................................................................................................................................................	36
Related Documents.........................................................................................................................................................	36
2 Con€guration Fundamentals........................................................................................................................	37
Accessing the Command Line........................................................................................................................................	37
CLI Modes.........................................................................................................................................................................	37
Navigating CLI Modes...............................................................................................................................................	39
The do Command............................................................................................................................................................	42
Undoing Commands........................................................................................................................................................	42
Obtaining Help..................................................................................................................................................................	43
Entering and Editing Commands....................................................................................................................................	43
Command History............................................................................................................................................................	44
Filtering show Command Outputs.................................................................................................................................	44
Example of the grep Keyword..................................................................................................................................	44
Multiple Users in Configuration Mode...........................................................................................................................	45
3 Getting Started............................................................................................................................................	46
Console Access................................................................................................................................................................	47
Serial Console.............................................................................................................................................................	47
Default Configuration......................................................................................................................................................	48
Configuring a Host Name...............................................................................................................................................	48
Accessing the System Remotely....................................................................................................................................	48
Accessing the System Remotely..............................................................................................................................	49
Configure the Management Port IP Address.........................................................................................................	49
Configure a Management Route..............................................................................................................................	49
Configuring a Username and Password..................................................................................................................	49
Configuring the Enable Password..................................................................................................................................	50
Configuration File Management......................................................................................................................................	51
Copy Files to and from the System..........................................................................................................................	51
Mounting an NFS File System..................................................................................................................................	52
Save the Running-Configuration..............................................................................................................................	53
Configure the Overload Bit for a Startup Scenario...............................................................................................	54
Viewing Files...............................................................................................................................................................	54
Managing the File System..............................................................................................................................................	55
View Command History..................................................................................................................................................	55
Upgrading Dell EMC Networking OS............................................................................................................................	56
Using HTTP for File Transfers........................................................................................................................................	56
Verify Software Images Before Installation...................................................................................................................	57
4 Management...............................................................................................................................................	58

Contents 3

Configuring Privilege Levels...........................................................................................................................................	58
Creating a Custom Privilege Level...........................................................................................................................	59
Removing a Command from EXEC Mode..............................................................................................................	59
Moving a Command from EXEC Privilege Mode to EXEC Mode........................................................................	59
Allowing Access to CONFIGURATION Mode Commands....................................................................................	59
Allowing Access to Different Modes........................................................................................................................	59
Applying a Privilege Level to a Username................................................................................................................	61
Applying a Privilege Level to a Terminal Line...........................................................................................................	61
Configuring Logging.........................................................................................................................................................	61
Audit and Security Logs............................................................................................................................................	62
Configuring Logging Format ...................................................................................................................................	63
Setting Up a Secure Connection to a Syslog Server.............................................................................................	63
Log Messages in the Internal Buffer..............................................................................................................................	65
Configuration Task List for System Log Management..........................................................................................	65
Disabling System Logging...............................................................................................................................................	65
Sending System Messages to a Syslog Server............................................................................................................	65
Configuring a UNIX System as a Syslog Server.....................................................................................................	65
Track Login Activity.........................................................................................................................................................	66
Restrictions for Tracking Login Activity..................................................................................................................	66
Configuring Login Activity Tracking.........................................................................................................................	66
Display Login Statistics..............................................................................................................................................	67
Limit Concurrent Login Sessions....................................................................................................................................	68
Restrictions for Limiting the Number of Concurrent Sessions............................................................................	68
Configuring Concurrent Session Limit.....................................................................................................................	68
Enabling the System to Clear Existing Sessions....................................................................................................	69
Enabling Secured CLI Mode...........................................................................................................................................	70
Changing System Logging Settings...............................................................................................................................	70
Display the Logging Buffer and the Logging Configuration.........................................................................................	71
Configuring a UNIX Logging Facility Level.....................................................................................................................	71
Synchronizing Log Messages.........................................................................................................................................	72
Enabling Timestamp on Syslog Messages....................................................................................................................	73
File Transfer Services.......................................................................................................................................................	73
Configuration Task List for File Transfer Services..................................................................................................	74
Enabling the FTP Server...........................................................................................................................................	74
Configuring FTP Server Parameters........................................................................................................................	74
Configuring FTP Client Parameters.........................................................................................................................	75
Terminal Lines...................................................................................................................................................................	75
Denying and Permitting Access to a Terminal Line................................................................................................	75
Configuring Login Authentication for Terminal Lines.............................................................................................	76
Setting Timeout for EXEC Privilege Mode....................................................................................................................	77
Using Telnet to get to Another Network Device..........................................................................................................	78
Lock CONFIGURATION Mode.......................................................................................................................................	78
Viewing the Configuration Lock Status...................................................................................................................	78
Restoring the Factory Default Settings.........................................................................................................................	79
Important Points to Remember................................................................................................................................	79

4 Contents

Restoring Factory Default Environment Variables.................................................................................................	80
Viewing the Reason for Last System Reboot...............................................................................................................	81
5 802.1X..........................................................................................................................................................	82
Port-Authentication Process..........................................................................................................................................	84
EAP over RADIUS......................................................................................................................................................	84
Configuring 802.1X...........................................................................................................................................................	85
Related Configuration Tasks.....................................................................................................................................	85
Important Points to Remember......................................................................................................................................	85
Enabling 802.1X................................................................................................................................................................	86
Configuring Request Identity Re-Transmissions...........................................................................................................	87
Configuring a Quiet Period after a Failed Authentication.....................................................................................	88
Forcibly Authorizing or Unauthorizing a Port...............................................................................................................	89
Re-Authenticating a Port................................................................................................................................................	89
Configuring Timeouts......................................................................................................................................................	90
Configuring Dynamic VLAN Assignment with Port Authentication...........................................................................	91
Guest and Authentication-Fail VLANs..........................................................................................................................	92
Configuring a Guest VLAN.......................................................................................................................................	93
Configuring an Authentication-Fail VLAN...............................................................................................................	93
6 Access Control Lists (ACLs)........................................................................................................................	95
IP Access Control Lists (ACLs)......................................................................................................................................	96
CAM Usage.................................................................................................................................................................	97
Implementing ACLs on Dell EMC Networking OS..................................................................................................	97
Important Points to Remember......................................................................................................................................	99
Configuration Task List for Route Maps..................................................................................................................	99
Configuring Match Routes.......................................................................................................................................	101
Configuring Set Conditions.....................................................................................................................................	103
Configure a Route Map for Route Redistribution.................................................................................................	104
Configure a Route Map for Route Tagging...........................................................................................................	104
Continue Clause.......................................................................................................................................................	105
IP Fragment Handling....................................................................................................................................................	105
IP Fragments ACL Examples...................................................................................................................................	105
Layer 4 ACL Rules Examples...................................................................................................................................	106
Configure a Standard IP ACL........................................................................................................................................	106
Configuring a Standard IP ACL Filter.....................................................................................................................	107
Configure an Extended IP ACL.....................................................................................................................................	108
Configuring Filters with a Sequence Number.......................................................................................................	108
Configuring Filters Without a Sequence Number.................................................................................................	110
Configure Layer 2 and Layer 3 ACLs.............................................................................................................................	111
Assign an IP ACL to an Interface...................................................................................................................................	111
Applying an IP ACL..........................................................................................................................................................	111
Counting ACL Hits.....................................................................................................................................................	112
Configure Ingress ACLs..................................................................................................................................................	112
Configure Egress ACLs...................................................................................................................................................	113
Applying Egress Layer 3 ACLs (Control-Plane).....................................................................................................	114

Contents 5

IP Prefix Lists...................................................................................................................................................................	114
Implementation Information.....................................................................................................................................	115
Configuration Task List for Prefix Lists...................................................................................................................	115
ACL Remarks...................................................................................................................................................................	118
Configuring a Remark...............................................................................................................................................	119
Deleting a Remark.....................................................................................................................................................	119
ACL Resequencing.........................................................................................................................................................	120
Resequencing an ACL or Prefix List.......................................................................................................................	120
Route Maps.....................................................................................................................................................................	122
Implementation Information....................................................................................................................................	122
Flow-Based Monitoring..................................................................................................................................................	122
Behavior of Flow-Based Monitoring.......................................................................................................................	122
Enabling Flow-Based Monitoring............................................................................................................................	124
Configuring IP Mirror Access Group............................................................................................................................	125
Sample Configuration...............................................................................................................................................	125
Example of viewing IP mirror–access–group applied to an Interface................................................................	126
7 Bidirectional Forwarding Detection (BFD)...................................................................................................	127
How BFD Works..............................................................................................................................................................	127
BFD Packet Format..................................................................................................................................................	128
BFD Sessions............................................................................................................................................................	129
BFD Three-Way Handshake....................................................................................................................................	130
Session State Changes............................................................................................................................................	132
Important Points to Remember....................................................................................................................................	132
Configure BFD................................................................................................................................................................	132
Configure BFD for Physical Ports...........................................................................................................................	133
Configure BFD for Static Routes............................................................................................................................	134
Configure BFD for IPv6 Static Routes...................................................................................................................	138
Configure BFD for OSPF.........................................................................................................................................	140
Configure BFD for OSPFv3.....................................................................................................................................	146
Configure BFD for IS-IS...........................................................................................................................................	149
Configure BFD for BGP............................................................................................................................................	151
Configure BFD for VRRP.........................................................................................................................................	159
Configuring Protocol Liveness.................................................................................................................................	161
8 Border Gateway Protocol (BGP)................................................................................................................	162
Border Gateway Protocol version 4 (BGPv4).............................................................................................................	162
Autonomous Systems (AS)...........................................................................................................................................	162
AS4 Number Representation..................................................................................................................................	164
Four-Byte AS Numbers...........................................................................................................................................	166
Multiprotocol BGP..........................................................................................................................................................	166
MBGP for IPv4 MulticastBGP Address Family modelIPv4 and IPv6 address family........................................	167
Sessions and Peers.........................................................................................................................................................	167
Establish a Session...................................................................................................................................................	167
Implementing BGP global and address family.............................................................................................................	168
BGP global configuration default values................................................................................................................	169

6 Contents

BGP Attributes for selecting Best Path.......................................................................................................................	169
Best Path Selection Criteria....................................................................................................................................	170
Weight.........................................................................................................................................................................	171
Local Preference.......................................................................................................................................................	172
Multi-Exit Discriminators (MEDs)...........................................................................................................................	172
Origin..........................................................................................................................................................................	173
AS Path......................................................................................................................................................................	174
Next Hop....................................................................................................................................................................	174
Implement BGP with Dell EMC Networking OS.........................................................................................................	175
Additional Path (Add-Path) Support......................................................................................................................	175
Advertise IGP Cost as MED for Redistributed Routes........................................................................................	175
Ignore Router-ID in Best-Path Calculation............................................................................................................	176
AS Number Migration...............................................................................................................................................	176
BGP4 Management Information Base (MIB)........................................................................................................	177
Important Points to Remember...............................................................................................................................	177
Configuration Information..............................................................................................................................................	178
Configuring a basic BGP network................................................................................................................................	178
Enabling BGP............................................................................................................................................................	178
Configuring a BGP peer............................................................................................................................................	181
Configuring AS4 Number Representations...........................................................................................................	182
Configuring a BGP VRF address family.................................................................................................................	183
Route-refresh and Soft-reconfiguration................................................................................................................	185
Aggregating Routes..................................................................................................................................................	188
Filtering BGP Routes................................................................................................................................................	188
Filtering BGP Routes Using Route Maps..............................................................................................................	190
Filtering BGP Routes Using AS-PATH Information..............................................................................................	190
Configuring Peer Groups..........................................................................................................................................	191
Configuring BGP Fast Fall-Over.............................................................................................................................	199
Configuring Passive Peering...................................................................................................................................	200
Maintaining Existing AS Numbers During an AS Migration.................................................................................	201
Allowing an AS Number to Appear in its Own AS Path......................................................................................	202
Enabling Graceful Restart.......................................................................................................................................	203
Filtering on an AS-Path Attribute..........................................................................................................................	204
Regular Expressions as Filters................................................................................................................................	205
Redistributing Routes..............................................................................................................................................	206
Enabling Additional Paths........................................................................................................................................	207
Configuring IP Community Lists.............................................................................................................................	207
Configuring an IP Extended Community List.......................................................................................................	208
Filtering Routes with Community Lists.................................................................................................................	209
Manipulating the COMMUNITY Attribute.............................................................................................................	210
Changing MED Attributes........................................................................................................................................	211
Changing the LOCAL_PREFERENCE Attribute...................................................................................................	212
Configuring the local System or a Different System to be the Next Hop for BGP-Learned Routes.............	212
Changing the WEIGHT Attribute............................................................................................................................	213
Enabling Multipath....................................................................................................................................................	213

Contents 7

Route Reflectors.......................................................................................................................................................	214
Configuring BGP Confederations...........................................................................................................................	215
Enabling Route Flap Dampening.............................................................................................................................	215
Changing BGP Timers..............................................................................................................................................	218
Setting the extended timer.....................................................................................................................................	218
Enabling or disabling BGP neighbors.....................................................................................................................	219
Route Map Continue...............................................................................................................................................	220
Enabling MBGP Configurations....................................................................................................................................	221
MBGP support for IPv6.................................................................................................................................................	221
Configuring IPv6 MBGP between peers.....................................................................................................................	221
Example-Configuring IPv4 and IPv6 neighbors.........................................................................................................	222
Configure IPv6 NH Automatically for IPv6 Prefix Advertised over IPv4 Neighbor...............................................	224
BGP Regular Expression Optimization........................................................................................................................	226
Debugging BGP.............................................................................................................................................................	226
Storing Last and Bad PDUs....................................................................................................................................	227
Capturing PDUs.......................................................................................................................................................	228
PDU Counters..........................................................................................................................................................	229
9 Content Addressable Memory (CAM)........................................................................................................	230
CAM Allocation..............................................................................................................................................................	230
Test CAM Usage............................................................................................................................................................	232
View CAM Profiles.........................................................................................................................................................	232
View CAM-ACL Settings..............................................................................................................................................	233
View CAM Usage...........................................................................................................................................................	234
Configuring CAM Threshold and Silence Period........................................................................................................	235
Setting CAM Threshold and Silence Period.........................................................................................................	235
CAM Optimization.........................................................................................................................................................	236
Troubleshoot CAM Profiling..........................................................................................................................................	236
QoS CAM Region Limitation...................................................................................................................................	237
Syslog Error When the Table is Full........................................................................................................................	237
Syslog Warning Upon 90 Percent Utilization of CAM.........................................................................................	237
Syslog Warning for Discrepancies Between Configured Extended Prefixes....................................................	237
Unified Forwarding Table (UFT) Modes......................................................................................................................	237
Configuring UFT Modes..........................................................................................................................................	238
10 Control Plane Policing (CoPP).................................................................................................................	239
Configure Control Plane Policing.................................................................................................................................	240
Configuring CoPP for Protocols.............................................................................................................................	241
Configuring CoPP for CPU Queues......................................................................................................................	243
Displaying CoPP Configuration .............................................................................................................................	244
11 Data Center Bridging (DCB)......................................................................................................................	246
Ethernet Enhancements in Data Center Bridging.....................................................................................................	246
Priority-Based Flow Control....................................................................................................................................	247
Enhanced Transmission Selection..........................................................................................................................	248
Data Center Bridging Exchange Protocol (DCBx)...............................................................................................	249

8 Contents

Data Center Bridging in a Traffic Flow..................................................................................................................	250
Enabling Data Center Bridging.....................................................................................................................................	250
DCB Maps and its Attributes..................................................................................................................................	251
Data Center Bridging: Default Configuration..............................................................................................................	252
Configuring Priority-Based Flow Control....................................................................................................................	252
Configuring Lossless Queues.................................................................................................................................	253
Configuring PFC in a DCB Map...................................................................................................................................	254
PFC Configuration Notes........................................................................................................................................	254
PFC Prerequisites and Restrictions.......................................................................................................................	255
Applying a DCB Map on a Port....................................................................................................................................	256
Configuring PFC without a DCB Map.........................................................................................................................	256
Configuring Lossless QueuesExample:..................................................................................................................	257
Priority-Based Flow Control Using Dynamic Buffer Method....................................................................................	258
Pause and Resume of Traffic..................................................................................................................................	258
Buffer Sizes for Lossless or PFC Packets............................................................................................................	258
Behavior of Tagged Packets.........................................................................................................................................	259
Configuration Example for DSCP and PFC Priorities................................................................................................	259
SNMP Support for PFC and Buffer Statistics Tracking...........................................................................................	260
Performing PFC Using DSCP Bits Instead of 802.1p Bits.........................................................................................	260
PFC and ETS Configuration Examples........................................................................................................................	261
Using PFC to Manage Converged Ethernet Traffic...................................................................................................	261
Operations on Untagged Packets.................................................................................................................................	261
Generation of PFC for a Priority for Untagged Packets...........................................................................................	262
Configure Enhanced Transmission Selection..............................................................................................................	262
ETS Prerequisites and Restrictions.......................................................................................................................	262
Creating an ETS Priority Group..............................................................................................................................	262
ETS Operation with DCBx......................................................................................................................................	264
Configuring Bandwidth Allocation for DCBx CIN.................................................................................................	264
Configuring ETS in a DCB Map..............................................................................................................................	265
Hierarchical Scheduling in ETS Output Policies.........................................................................................................	266
Using ETS to Manage Converged Ethernet Traffic...................................................................................................	267
Applying DCB Policies in a Switch Stack....................................................................................................................	267
Configure a DCBx Operation........................................................................................................................................	267
DCBx Operation.......................................................................................................................................................	267
DCBx Port Roles......................................................................................................................................................	268
DCB Configuration Exchange................................................................................................................................	269
Configuration Source Election...............................................................................................................................	269
Propagation of DCB Information............................................................................................................................	270
Auto-Detection and Manual Configuration of the DCBx Version.......................................................................	270
DCBx Example..........................................................................................................................................................	271
DCBx Prerequisites and Restrictions......................................................................................................................	271
Configuring DCBx.....................................................................................................................................................	271
Verifying the DCB Configuration..................................................................................................................................	275
QoS dot1p Traffic Classification and Queue Assignment..........................................................................................	283
Configuring the Dynamic Buffer Method....................................................................................................................	284

Contents 9

Sample DCB Configuration...........................................................................................................................................	285
PFC and ETS Configuration Command Examples...............................................................................................	287
12 Dynamic Host Con€guration Protocol (DHCP).........................................................................................	288
DHCP Packet Format and Options.............................................................................................................................	288
Assign an IP Address using DHCP...............................................................................................................................	290
Implementation Information..........................................................................................................................................	291
Configure the System to be a DHCP Server..............................................................................................................	291
Configuring the Server for Automatic Address Allocation..................................................................................	292
Specifying a Default Gateway................................................................................................................................	293
Configure a Method of Hostname Resolution.....................................................................................................	293
Using DNS for Address Resolution........................................................................................................................	293
Using NetBIOS WINS for Address Resolution.....................................................................................................	294
Creating Manual Binding Entries............................................................................................................................	294
Debugging the DHCP Server.................................................................................................................................	294
Using DHCP Clear Commands..............................................................................................................................	295
Configure the System to be a DHCP Client...............................................................................................................	295
Configuring the DHCP Client System...................................................................................................................	295
DHCP Client on a Management Interface............................................................................................................	297
DHCP Client Operation with Other Features.......................................................................................................	297
DHCP Relay When DHCP Server and Client are in Different VRFs........................................................................	298
Configuring Route Leaking between VRFs on DHCP Relay Agent...................................................................	298
Configure the System for User Port Stacking (Option 230)...................................................................................	300
Configure Secure DHCP...............................................................................................................................................	300
Option 82..................................................................................................................................................................	300
DHCP Snooping........................................................................................................................................................	301
Drop DHCP Packets on Snooped VLANs Only....................................................................................................	305
Dynamic ARP Inspection........................................................................................................................................	306
Configuring Dynamic ARP Inspection...................................................................................................................	307
Source Address Validation............................................................................................................................................	308
Enabling IP Source Address Validation..................................................................................................................	308
DHCP MAC Source Address Validation................................................................................................................	309
Enabling IP+MAC Source Address Validation.......................................................................................................	309
Viewing the Number of SAV Dropped Packets....................................................................................................	310
Clearing the Number of SAV Dropped Packets....................................................................................................	310
13 Equal Cost Multi-Path (ECMP).................................................................................................................	311
ECMP for Flow-Based Affinity.......................................................................................................................................	311
Configuring the Hash Algorithm..............................................................................................................................	311
Enabling Deterministic ECMP Next Hop................................................................................................................	311
Configuring the Hash Algorithm Seed...................................................................................................................	312
Link Bundle Monitoring..................................................................................................................................................	312
Managing ECMP Group Paths................................................................................................................................	313
Creating an ECMP Group Bundle...........................................................................................................................	313
Modifying the ECMP Group Threshold.................................................................................................................	313
Support for /128 IPv6 and /32 IPv4 Prefixes in Layer 3 Host Table and LPM Table.......................................	314

10 Contents

Support for ECMP in host table.............................................................................................................................	315
Support for moving /128 IPv6 Prefixes and /32 IPv4 Prefixes .........................................................................	315
14 FIP Snooping............................................................................................................................................	316
Fibre Channel over Ethernet.........................................................................................................................................	316
Ensure Robustness in a Converged Ethernet Network.............................................................................................	316
FIP Snooping on Ethernet Bridges...............................................................................................................................	318
FIP Snooping in a Switch Stack...................................................................................................................................	320
Using FIP Snooping.......................................................................................................................................................	320
FIP Snooping Prerequisites.....................................................................................................................................	320
Important Points to Remember.............................................................................................................................	320
Enabling the FCoE Transit Feature.........................................................................................................................	321
Enable FIP Snooping on VLANs.............................................................................................................................	322
Configure the FC-MAP Value................................................................................................................................	322
Configure a Port for a Bridge-to-Bridge Link.......................................................................................................	322
Configure a Port for a Bridge-to-FCF Link...........................................................................................................	322
Impact on Other Software Features.....................................................................................................................	322
FIP Snooping Restrictions......................................................................................................................................	323
Configuring FIP Snooping.......................................................................................................................................	323
Displaying FIP Snooping Information...........................................................................................................................	324
FCoE Transit Configuration Example...........................................................................................................................	329
15 Flex Hash and Optimized Boot-Up............................................................................................................	331
Flex Hash Capability Overview.....................................................................................................................................	331
Configuring the Flex Hash Mechanism........................................................................................................................	331
Configuring Fast Boot and LACP Fast Switchover...................................................................................................	332
Optimizing the Boot Time.............................................................................................................................................	332
Booting Process When Optimized Boot Time Mechanism is Enabled..............................................................	332
Guidelines for Configuring Optimized Booting Mechanism................................................................................	333
Interoperation of Applications with Fast Boot and System States..........................................................................	334
LACP and IPv4 Routing..........................................................................................................................................	334
LACP and IPv6 Routing..........................................................................................................................................	334
BGP Graceful Restart.............................................................................................................................................	335
Cold Boot Caused by Power Cycling the System................................................................................................	335
Unexpected Reload of the System........................................................................................................................	335
Software Upgrade...................................................................................................................................................	335
LACP Fast Switchover............................................................................................................................................	335
Changes to BGP Multipath....................................................................................................................................	336
Delayed Installation of ECMP Routes Into BGP...................................................................................................	336
RDMA Over Converged Ethernet (RoCE) Overview...............................................................................................	336
Preserving 802.1Q VLAN Tag Value for Lite Subinterfaces......................................................................................	337
16 Force10 Resilient Ring Protocol (FRRP)...................................................................................................	338
Protocol Overview.........................................................................................................................................................	338
Ring Status...............................................................................................................................................................	339
Multiple FRRP Rings...............................................................................................................................................	339

Contents 11

Important FRRP Points...........................................................................................................................................	340
Important FRRP Concepts......................................................................................................................................	341
Implementing FRRP.......................................................................................................................................................	342
FRRP Configuration.......................................................................................................................................................	342
Creating the FRRP Group.......................................................................................................................................	342
Configuring the Control VLAN...............................................................................................................................	343
Configuring and Adding the Member VLANs.......................................................................................................	344
Setting the FRRP Timers........................................................................................................................................	345
Clearing the FRRP Counters..................................................................................................................................	345
Viewing the FRRP Configuration...........................................................................................................................	345
Viewing the FRRP Information..............................................................................................................................	345
Troubleshooting FRRP..................................................................................................................................................	346
Configuration Checks..............................................................................................................................................	346
Sample Configuration and Topology............................................................................................................................	346
FRRP Support on VLT...................................................................................................................................................	347
Example Scenario....................................................................................................................................................	348
Important Points to Remember.............................................................................................................................	349
17 GARP VLAN Registration Protocol (GVRP)..............................................................................................	350
Important Points to Remember...................................................................................................................................	350
Configure GVRP.............................................................................................................................................................	351
Related Configuration Tasks....................................................................................................................................	351
Enabling GVRP Globally................................................................................................................................................	352
Enabling GVRP on a Layer 2 Interface........................................................................................................................	352
Configure GVRP Registration......................................................................................................................................	352
Configure a GARP Timer..............................................................................................................................................	353
18 Internet Group Management Protocol (IGMP).........................................................................................	354
IGMP Implementation Information..............................................................................................................................	354
IGMP Protocol Overview..............................................................................................................................................	354
IGMP Version 2........................................................................................................................................................	354
IGMP Version 3........................................................................................................................................................	356
Configure IGMP.............................................................................................................................................................	359
Related Configuration Tasks...................................................................................................................................	359
Viewing IGMP Enabled Interfaces...............................................................................................................................	360
Selecting an IGMP Version...........................................................................................................................................	360
Viewing IGMP Groups....................................................................................................................................................	361
Adjusting Timers.............................................................................................................................................................	361
Adjusting Query and Response Timers..................................................................................................................	361
Enabling IGMP Immediate-Leave.................................................................................................................................	362
IGMP Snooping..............................................................................................................................................................	363
IGMP Snooping Implementation Information.......................................................................................................	363
Configuring IGMP Snooping...................................................................................................................................	363
Removing a Group-Port Association.....................................................................................................................	364
Disabling Multicast Flooding...................................................................................................................................	364
Specifying a Port as Connected to a Multicast Router......................................................................................	364

12 Contents

Configuring the Switch as Querier........................................................................................................................	365
Fast Convergence after MSTP Topology Changes...................................................................................................	365
Egress Interface Selection (EIS) for HTTP and IGMP Applications........................................................................	365
Protocol Separation.................................................................................................................................................	366
Enabling and Disabling Management Egress Interface Selection......................................................................	367
Handling of Management Route Configuration...................................................................................................	368
Handling of Switch-Initiated Traffic.......................................................................................................................	368
Handling of Switch-Destined Traffic......................................................................................................................	369
Handling of Transit Traffic (Traffic Separation).....................................................................................................	370
Mapping of Management Applications and Traffic Type.....................................................................................	370
Behavior of Various Applications for Switch-Initiated Traffic .............................................................................	371
Behavior of Various Applications for Switch-Destined Traffic ...........................................................................	372
Interworking of EIS With Various Applications.....................................................................................................	372
Designating a Multicast Router Interface...................................................................................................................	373
19 Interfaces.................................................................................................................................................	374
Basic Interface Configuration.......................................................................................................................................	374
Advanced Interface Configuration...............................................................................................................................	374
Interface Types...............................................................................................................................................................	375
View Basic Interface Information.................................................................................................................................	375
Resetting an Interface to its Factory Default State...................................................................................................	377
Enabling a Physical Interface........................................................................................................................................	378
Physical Interfaces.........................................................................................................................................................	378
Configuration Task List for Physical Interfaces....................................................................................................	378
40G to 1G Breakout Cable Adaptor.......................................................................................................................	378
Overview of Layer Modes.......................................................................................................................................	379
Configuring Layer 2 (Data Link) Mode..................................................................................................................	380
Configuring Layer 2 (Interface) Mode..................................................................................................................	380
Configuring Layer 3 (Network) Mode...................................................................................................................	380
Configuring Layer 3 (Interface) Mode...................................................................................................................	381
Automatic recovery of an Err-disabled interface.......................................................................................................	382
Configuring an automatic recovery for an Err-disabled interface......................................................................	382
Egress Interface Selection (EIS)..................................................................................................................................	383
Important Points to Remember.............................................................................................................................	383
Configuring EIS........................................................................................................................................................	383
Management Interfaces................................................................................................................................................	384
Configuring Management Interfaces.....................................................................................................................	384
Configuring a Management Interface on an Ethernet Port...............................................................................	385
VLAN Interfaces............................................................................................................................................................	386
Loopback Interfaces......................................................................................................................................................	387
Null Interfaces.................................................................................................................................................................	387
Port Channel Interfaces................................................................................................................................................	387
Port Channel Definition and Standards.................................................................................................................	388
Port Channel Benefits.............................................................................................................................................	388
Port Channel Implementation.................................................................................................................................	388
Interfaces in Port Channels....................................................................................................................................	389

Contents 13

Configuration Tasks for Port Channel Interfaces.................................................................................................	389
Creating a Port Channel.........................................................................................................................................	389
Adding a Physical Interface to a Port Channel.....................................................................................................	390
Reassigning an Interface to a New Port Channel.................................................................................................	391
Configuring the Minimum Oper Up Links in a Port Channel..............................................................................	392
Adding or Removing a Port Channel from a VLAN.............................................................................................	392
Assigning an IP Address to a Port Channel..........................................................................................................	394
Deleting or Disabling a Port Channel.....................................................................................................................	394
Load Balancing Through Port Channels................................................................................................................	394
Changing the Hash Algorithm................................................................................................................................	394
Bulk Configuration.........................................................................................................................................................	396
Interface Range.......................................................................................................................................................	396
Bulk Configuration Examples..................................................................................................................................	396
Defining Interface Range Macros................................................................................................................................	398
Define the Interface Range....................................................................................................................................	398
Choosing an Interface-Range Macro....................................................................................................................	398
Monitoring and Maintaining Interfaces.......................................................................................................................	398
Maintenance Using TDR.........................................................................................................................................	399
Non Dell-Qualified Transceivers...................................................................................................................................	400
Splitting 40G Ports without Reload............................................................................................................................	400
Splitting QSFP Ports to SFP+ Ports...........................................................................................................................	402
Converting a QSFP or QSFP+ Port to an SFP or SFP+ Port..................................................................................	403
Important Points to Remember.............................................................................................................................	403
Example Scenarios..................................................................................................................................................	404
Link Dampening.............................................................................................................................................................	405
Important Points to Remember.............................................................................................................................	405
Configuration Example of Link Dampening..........................................................................................................	406
Enabling Link Dampening........................................................................................................................................	408
Link Bundle Monitoring.................................................................................................................................................	409
Using Ethernet Pause Frames for Flow Control.........................................................................................................	410
Enabling Pause Frames............................................................................................................................................	410
Configure the MTU Size on an Interface.....................................................................................................................	411
Port-Pipes........................................................................................................................................................................	412
Auto-Negotiation on Ethernet Interfaces....................................................................................................................	412
Setting the Speed of Ethernet Interfaces.............................................................................................................	412
Set Auto-Negotiation Options................................................................................................................................	414
View Advanced Interface Information..........................................................................................................................	414
Configuring the Interface Sampling Size...............................................................................................................	415
Configuring the Traffic Sampling Size Globally...........................................................................................................	416
Dynamic Counters..........................................................................................................................................................	418
Clearing Interface Counters....................................................................................................................................	418
Compressing Configuration Files..................................................................................................................................	419
Discard Counters............................................................................................................................................................	421
Display discard counters.........................................................................................................................................	422
20 IPv4 Routing............................................................................................................................................	424

14 Contents

IP Addresses...................................................................................................................................................................	425
Implementation Information....................................................................................................................................	425
Configuration Tasks for IP Addresses..........................................................................................................................	425
Assigning IP Addresses to an Interface.......................................................................................................................	425
Configuring Static Routes.............................................................................................................................................	426
Configure Static Routes for the Management Interface..........................................................................................	427
IPv4 Path MTU Discovery Overview..........................................................................................................................	428
Packet handling during MTU mismatch................................................................................................................	428
Using the Configured Source IP Address in ICMP Messages..................................................................................	428
Configuring the ICMP Source Interface...............................................................................................................	428
Configuring the Duration to Establish a TCP Connection........................................................................................	429
Enabling Directed Broadcast........................................................................................................................................	429
Resolution of Host Names............................................................................................................................................	429
Enabling Dynamic Resolution of Host Names............................................................................................................	430
Specifying the Local System Domain and a List of Domains...................................................................................	430
Configuring DNS with Traceroute................................................................................................................................	431
ARP..................................................................................................................................................................................	431
Configuration Tasks for ARP........................................................................................................................................	432
Configuring Static ARP Entries....................................................................................................................................	432
Enabling Proxy ARP.......................................................................................................................................................	432
Clearing ARP Cache......................................................................................................................................................	433
ARP Learning via Gratuitous ARP................................................................................................................................	433
Enabling ARP Learning via Gratuitous ARP................................................................................................................	433
ARP Learning via ARP Request...................................................................................................................................	433
Configuring ARP Retries...............................................................................................................................................	434
ICMP...............................................................................................................................................................................	435
Configuration Tasks for ICMP......................................................................................................................................	435
Enabling ICMP Unreachable Messages......................................................................................................................	435
UDP Helper.....................................................................................................................................................................	435
Configure UDP Helper.............................................................................................................................................	435
Important Points to Remember.............................................................................................................................	436
Enabling UDP Helper.....................................................................................................................................................	436
Configurations Using UDP Helper...............................................................................................................................	436
UDP Helper with Broadcast-All Addresses.................................................................................................................	436
UDP Helper with Subnet Broadcast Addresses.........................................................................................................	437
UDP Helper with Configured Broadcast Addresses..................................................................................................	437
UDP Helper with No Configured Broadcast Addresses............................................................................................	438
Troubleshooting UDP Helper........................................................................................................................................	438
21 IPv6 Routing............................................................................................................................................	439
Protocol Overview.........................................................................................................................................................	439
Extended Address Space........................................................................................................................................	440
Stateless Autoconfiguration...................................................................................................................................	440
IPv6 Headers............................................................................................................................................................	440
Longest Prefix Match (LPM) Table and IPv6 /65 – /128 support....................................................................	441
IPv6 Header Fields...................................................................................................................................................	442

Contents 15

Extension Header Fields..........................................................................................................................................	444
Addressing................................................................................................................................................................	445
Implementing IPv6 with Dell EMC Networking OS...................................................................................................	446
ICMPv6...........................................................................................................................................................................	447
Path MTU discovery......................................................................................................................................................	448
IPv6 Neighbor Discovery..............................................................................................................................................	448
IPv6 Neighbor Discovery of MTU Packets...........................................................................................................	449
Configuring the IPv6 Recursive DNS Server.......................................................................................................	449
Debugging IPv6 RDNSS Information Sent to the Host .....................................................................................	450
Displaying IPv6 RDNSS Information......................................................................................................................	450
Secure Shell (SSH) Over an IPv6 Transport...............................................................................................................	451
Configuration Tasks for IPv6.........................................................................................................................................	451
Adjusting Your CAM-Profile.....................................................................................................................................	451
Assigning an IPv6 Address to an Interface...........................................................................................................	452
Assigning a Static IPv6 Route................................................................................................................................	453
Configuring Telnet with IPv6..................................................................................................................................	453
SNMP over IPv6......................................................................................................................................................	454
Displaying IPv6 Information....................................................................................................................................	454
Displaying an IPv6 Interface Information..............................................................................................................	454
Showing IPv6 Routes..............................................................................................................................................	455
Showing the Running-Configuration for an Interface.........................................................................................	456
Clearing IPv6 Routes...............................................................................................................................................	457
Disabling ND Entry Timeout...................................................................................................................................	457
Configuring IPv6 RA Guard..........................................................................................................................................	457
Configuring IPv6 RA Guard on an Interface.........................................................................................................	459
Monitoring IPv6 RA Guard.....................................................................................................................................	460
22 iSCSI Optimization...................................................................................................................................	461
iSCSI Optimization Overview........................................................................................................................................	461
Monitoring iSCSI Traffic Flows...............................................................................................................................	463
Application of Quality of Service to iSCSI Traffic Flows.....................................................................................	463
Information Monitored in iSCSI Traffic Flows.......................................................................................................	463
Detection and Auto-Configuration for Dell EqualLogic Arrays...........................................................................	464
Configuring Detection and Ports for Dell Compellent Arrays.............................................................................	464
Synchronizing iSCSI Sessions Learned on VLT-Lags with VLT-Peer.................................................................	465
Enable and Disable iSCSI Optimization.................................................................................................................	465
Default iSCSI Optimization Values...............................................................................................................................	466
iSCSI Optimization Prerequisites.................................................................................................................................	466
Configuring iSCSI Optimization...................................................................................................................................	466
Displaying iSCSI Optimization Information.................................................................................................................	468
23 Intermediate System to Intermediate System...........................................................................................	470
IS-IS Protocol Overview................................................................................................................................................	470
IS-IS Addressing.............................................................................................................................................................	470
Multi-Topology IS-IS.......................................................................................................................................................	471
Transition Mode........................................................................................................................................................	471

16 Contents

Interface Support.....................................................................................................................................................	472
Adjacencies...............................................................................................................................................................	472
Graceful Restart.............................................................................................................................................................	472
Timers........................................................................................................................................................................	472
Implementation Information..........................................................................................................................................	472
Configuration Information.............................................................................................................................................	473
Configuration Tasks for IS-IS..................................................................................................................................	474
Configuring the Distance of a Route......................................................................................................................	481
Changing the IS-Type..............................................................................................................................................	482
Redistributing IPv4 Routes.....................................................................................................................................	484
Redistributing IPv6 Routes.....................................................................................................................................	485
Configuring Authentication Passwords.................................................................................................................	486
Setting the Overload Bit.........................................................................................................................................	486
Debugging IS-IS.......................................................................................................................................................	487
IS-IS Metric Styles.........................................................................................................................................................	488
Configure Metric Values...............................................................................................................................................	488
Maximum Values in the Routing Table..................................................................................................................	488
Change the IS-IS Metric Style in One Level Only................................................................................................	488
Leaks from One Level to Another..........................................................................................................................	490
Sample Configurations...................................................................................................................................................	491
24 Link Aggregation Control Protocol (LACP)..............................................................................................	493
Introduction to Dynamic LAGs and LACP..................................................................................................................	493
Important Points to Remember.............................................................................................................................	493
LACP Modes............................................................................................................................................................	494
Configuring LACP Commands...............................................................................................................................	494
LACP Configuration Tasks............................................................................................................................................	495
Creating a LAG.........................................................................................................................................................	495
Configuring the LAG Interfaces as Dynamic........................................................................................................	495
Setting the LACP Long Timeout...........................................................................................................................	496
Monitoring and Debugging LACP..........................................................................................................................	496
Shared LAG State Tracking...........................................................................................................................................	497
Configuring Shared LAG State Tracking...............................................................................................................	497
Important Points about Shared LAG State Tracking...........................................................................................	499
LACP Basic Configuration Example............................................................................................................................	499
Configure a LAG on ALPHA...................................................................................................................................	499
25 Layer 2....................................................................................................................................................	508
Manage the MAC Address Table.................................................................................................................................	508
Clearing the MAC Address Table...........................................................................................................................	508
Setting the Aging Time for Dynamic Entries........................................................................................................	508
Configuring a Static MAC Address........................................................................................................................	509
Displaying the MAC Address Table........................................................................................................................	509
MAC Learning Limit.......................................................................................................................................................	509
Setting the MAC Learning Limit.............................................................................................................................	510
mac learning-limit Dynamic.....................................................................................................................................	510

Contents 17

mac learning-limit mac-address-sticky..................................................................................................................	510
mac learning-limit station-move..............................................................................................................................	511
mac learning-limit no-station-move........................................................................................................................	511
Learning Limit Violation Actions...............................................................................................................................	511
Setting Station Move Violation Actions.................................................................................................................	512
Recovering from Learning Limit and Station Move Violations............................................................................	512
NIC Teaming....................................................................................................................................................................	513
Configure Redundant Pairs...........................................................................................................................................	514
Important Points about Configuring Redundant Pairs.........................................................................................	516
Far-End Failure Detection..............................................................................................................................................	517
FEFD State Changes................................................................................................................................................	518
Configuring FEFD.....................................................................................................................................................	519
Enabling FEFD on an Interface...............................................................................................................................	519
Debugging FEFD......................................................................................................................................................	520
26 Link Layer Discovery Protocol (LLDP).....................................................................................................	522
802.1AB (LLDP) Overview............................................................................................................................................	522
Protocol Data Units.................................................................................................................................................	522
Optional TLVs.................................................................................................................................................................	523
Management TLVs...................................................................................................................................................	523
TIA-1057 (LLDP-MED) Overview................................................................................................................................	525
TIA Organizationally Specific TLVs........................................................................................................................	525
Configure LLDP.............................................................................................................................................................	529
Related Configuration Tasks...................................................................................................................................	529
Important Points to Remember.............................................................................................................................	529
LLDP Compatibility..................................................................................................................................................	530
CONFIGURATION versus INTERFACE Configurations............................................................................................	530
Enabling LLDP................................................................................................................................................................	530
Disabling and Undoing LLDP...................................................................................................................................	531
Enabling LLDP on Management Ports.........................................................................................................................	531
Disabling and Undoing LLDP on Management Ports...........................................................................................	531
Advertising TLVs.............................................................................................................................................................	531
Storing and Viewing Unrecognized LLDP TLVs.........................................................................................................	533
Reserved Unrecognized LLDP TLVs.....................................................................................................................	533
Organizational Specific Unrecognized LLDP TLVs..............................................................................................	533
Viewing Unrecognized LLDP TLVs........................................................................................................................	533
Viewing the LLDP Configuration.................................................................................................................................	534
Viewing Information Advertised by Adjacent LLDP Neighbors................................................................................	534
Examples of Viewing Information Advertised by Neighbors...............................................................................	534
Configuring LLDPDU Intervals.....................................................................................................................................	536
Configuring LLDP Notification Interval.......................................................................................................................	537
Configuring LLDP Notification Interval.......................................................................................................................	537
Configuring Transmit and Receive Mode....................................................................................................................	537
Configuring the Time to Live Value.............................................................................................................................	538
Debugging LLDP............................................................................................................................................................	539
Relevant Management Objects...................................................................................................................................	540

18 Contents

27 Microsoft Network Load Balancing..........................................................................................................	545
NLB Unicast Mode Scenario........................................................................................................................................	545
NLB Multicast Mode Scenario.....................................................................................................................................	545
Limitations of the NLB Feature....................................................................................................................................	546
Microsoft Clustering......................................................................................................................................................	546
Enable and Disable VLAN Flooding ............................................................................................................................	546
Configuring a Switch for NLB .....................................................................................................................................	546
Enabling a Switch for Multicast NLB....................................................................................................................	547
28 Multicast Source Discovery Protocol (MSDP).........................................................................................	548
Protocol Overview.........................................................................................................................................................	548
Anycast RP.....................................................................................................................................................................	549
Implementation Information.........................................................................................................................................	550
Configure Multicast Source Discovery Protocol........................................................................................................	550
Related Configuration Tasks...................................................................................................................................	550
Enable MSDP.................................................................................................................................................................	554
Manage the Source-Active Cache..............................................................................................................................	555
Viewing the Source-Active Cache........................................................................................................................	555
Limiting the Source-Active Cache........................................................................................................................	555
Clearing the Source-Active Cache........................................................................................................................	556
Enabling the Rejected Source-Active Cache.......................................................................................................	556
Accept Source-Active Messages that Fail the RFP Check.....................................................................................	556
Specifying Source-Active Messages...........................................................................................................................	559
Limiting the Source-Active Messages from a Peer...................................................................................................	560
Preventing MSDP from Caching a Local Source.......................................................................................................	560
Preventing MSDP from Caching a Remote Source...................................................................................................	561
Preventing MSDP from Advertising a Local Source..................................................................................................	561
Logging Changes in Peership States...........................................................................................................................	562
Terminating a Peership..................................................................................................................................................	562
Clearing Peer Statistics.................................................................................................................................................	563
Debugging MSDP..........................................................................................................................................................	563
MSDP with Anycast RP................................................................................................................................................	564
Configuring Anycast RP...............................................................................................................................................	565
Reducing Source-Active Message Flooding........................................................................................................	566
Specifying the RP Address Used in SA Messages..............................................................................................	566
MSDP Sample Configurations.....................................................................................................................................	568
32 Multicast Listener Discovery Protocol......................................................................................................	571
MLD Version 1.................................................................................................................................................................	571
MLD Querier Router.......................................................................................................................................................	571
Joining a Multicast Group.............................................................................................................................................	572
Leaving a Multicast Group............................................................................................................................................	572
MLD version 2................................................................................................................................................................	572
MLD timers.....................................................................................................................................................................	574
Reducing Host Response Burstiness....................................................................................................................	575

Contents 19

Clearing MLD groups.....................................................................................................................................................	575
Debugging MLD.............................................................................................................................................................	575
Explicit Tracking.............................................................................................................................................................	575
Reducing Leave Latency...............................................................................................................................................	575
Displaying MLD groups table........................................................................................................................................	576
Displaying MLD Interfaces............................................................................................................................................	576
30 Multiple Spanning Tree Protocol (MSTP).................................................................................................	577
Protocol Overview.........................................................................................................................................................	577
Spanning Tree Variations...............................................................................................................................................	578
Implementation Information....................................................................................................................................	578
Configure Multiple Spanning Tree Protocol................................................................................................................	578
Related Configuration Tasks...................................................................................................................................	579
Enable Multiple Spanning Tree Globally.......................................................................................................................	579
Adding and Removing Interfaces.................................................................................................................................	579
Creating Multiple Spanning Tree Instances................................................................................................................	580
Influencing MSTP Root Selection................................................................................................................................	581
Interoperate with Non-Dell Bridges.............................................................................................................................	582
Changing the Region Name or Revision.....................................................................................................................	582
Modifying Global Parameters.......................................................................................................................................	582
Modifying the Interface Parameters...........................................................................................................................	584
Configuring an EdgePort..............................................................................................................................................	585
Flush MAC Addresses after a Topology Change.......................................................................................................	585
MSTP Sample Configurations......................................................................................................................................	586
Router 1 Running-ConfigurationRouter 2 Running-ConfigurationRouter 3 Running-
ConfigurationSFTOS Example Running-Configuration.......................................................................................	586
Debugging and Verifying MSTP Configurations........................................................................................................	590
31 Multicast Features....................................................................................................................................	592
Enabling IP Multicast.....................................................................................................................................................	592
Implementation Information..........................................................................................................................................	592
Multicast Policies...........................................................................................................................................................	593
IPv4 Multicast Policies............................................................................................................................................	593
Understanding Multicast Traceroute (mtrace)..........................................................................................................	600
Important Points to Remember..............................................................................................................................	601
Printing Multicast Traceroute (mtrace) Paths............................................................................................................	601
Supported Error Codes.................................................................................................................................................	602
mtrace Scenarios...........................................................................................................................................................	603
32 Multicast Listener Discovery Protocol.....................................................................................................	609
MLD Version 1................................................................................................................................................................	609
MLD Querier Router......................................................................................................................................................	609
Joining a Multicast Group..............................................................................................................................................	610
Leaving a Multicast Group............................................................................................................................................	610
MLD version 2.................................................................................................................................................................	610
MLD timers......................................................................................................................................................................	612

20 Contents

Reducing Host Response Burstiness.....................................................................................................................	613
Clearing MLD groups.....................................................................................................................................................	613
Debugging MLD..............................................................................................................................................................	613
Explicit Tracking..............................................................................................................................................................	613
Reducing Leave Latency................................................................................................................................................	613
Displaying MLD groups table.........................................................................................................................................	614
Displaying MLD Interfaces.............................................................................................................................................	614
MLD Snooping................................................................................................................................................................	614
Enable MLD Snooping.............................................................................................................................................	614
Disable MLD Snooping.............................................................................................................................................	615
Configure the switch as a querier..........................................................................................................................	615
Specify port as connected to multicast router.....................................................................................................	615
Enable Snooping Explicit Tracking..........................................................................................................................	616
Display the MLD Snooping Table............................................................................................................................	616
33 Object Tracking........................................................................................................................................	617
Object Tracking Overview.............................................................................................................................................	617
Track Layer 2 Interfaces..........................................................................................................................................	618
Track Layer 3 Interfaces..........................................................................................................................................	618
Track IPv4 and IPv6 Routes....................................................................................................................................	619
Set Tracking Delays.................................................................................................................................................	620
VRRP Object Tracking............................................................................................................................................	620
Object Tracking Configuration.....................................................................................................................................	620
Tracking a Layer 2 Interface...................................................................................................................................	620
Tracking a Layer 3 Interface....................................................................................................................................	621
Track an IPv4/IPv6 Route......................................................................................................................................	623
Displaying Tracked Objects...........................................................................................................................................	626
34 Open Shortest Path First (OSPFv2 and OSPFv3)....................................................................................	628
Protocol Overview.........................................................................................................................................................	628
Autonomous System (AS) Areas...........................................................................................................................	628
Area Types................................................................................................................................................................	629
Networks and Neighbors........................................................................................................................................	630
Router Types............................................................................................................................................................	630
Designated and Backup Designated Routers.......................................................................................................	632
Link-State Advertisements (LSAs)........................................................................................................................	632
Router Priority and Cost.........................................................................................................................................	633
OSPF with Dell EMC Networking OS.........................................................................................................................	634
Graceful Restart......................................................................................................................................................	635
Fast Convergence (OSPFv2, IPv4 Only)..............................................................................................................	636
Multi-Process OSPFv2 with VRF..........................................................................................................................	636
RFC-2328 Compliant OSPF Flooding...................................................................................................................	636
OSPF ACK Packing..................................................................................................................................................	637
Setting OSPF Adjacency with Cisco Routers.......................................................................................................	637
Configuration Information.............................................................................................................................................	638
Configuration Task List for OSPFv2 (OSPF for IPv4)........................................................................................	638

Contents 21

OSPFv3 NSSA...............................................................................................................................................................	652
NSSA Options..........................................................................................................................................................	652
Configuration Task List for OSPFv3 (OSPF for IPv6)..............................................................................................	653
Enabling IPv6 Unicast Routing...............................................................................................................................	653
Applying cost for OSPFv3......................................................................................................................................	654
Assigning IPv6 Addresses on an Interface...........................................................................................................	654
Assigning Area ID on an Interface..........................................................................................................................	654
Assigning OSPFv3 Process ID and Router ID Globally........................................................................................	655
Assigning OSPFv3 Process ID and Router ID to a VRF......................................................................................	655
Configuring Stub Areas...........................................................................................................................................	656
Configuring Passive-Interface................................................................................................................................	656
Redistributing Routes..............................................................................................................................................	656
Configuring a Default Route...................................................................................................................................	657
Enabling OSPFv3 Graceful Restart.......................................................................................................................	657
OSPFv3 Authentication Using IPsec.....................................................................................................................	659
Troubleshooting OSPFv3........................................................................................................................................	665
35 Policy-based Routing (PBR)....................................................................................................................	667
Overview.........................................................................................................................................................................	667
Implementing PBR.........................................................................................................................................................	668
Configuration Task List for Policy-based Routing......................................................................................................	668
PBR Exceptions (Permit).......................................................................................................................................	669
Create a Redirect List.............................................................................................................................................	669
Create a Rule for a Redirect-list.............................................................................................................................	669
Apply a Redirect-list to an Interface using a Redirect-group..............................................................................	671
Sample Configuration....................................................................................................................................................	673
Create the Redirect-List GOLDAssign Redirect-List GOLD to Interface 2/11View Redirect-List GOLD......	674
36 PIM Sparse-Mode (PIM-SM)..................................................................................................................	678
Implementation Information..........................................................................................................................................	678
Protocol Overview.........................................................................................................................................................	678
Requesting Multicast Traffic...................................................................................................................................	678
Refuse Multicast Traffic..........................................................................................................................................	679
Send Multicast Traffic.............................................................................................................................................	679
Configuring PIM-SM.....................................................................................................................................................	679
Related Configuration Tasks...................................................................................................................................	680
Enable PIM-SM..............................................................................................................................................................	680
Configuring S,G Expiry Timers.....................................................................................................................................	682
Configuring a Static Rendezvous Point......................................................................................................................	682
Overriding Bootstrap Router Updates..................................................................................................................	683
Configuring a Designated Router.................................................................................................................................	683
Creating Multicast Boundaries and Domains.............................................................................................................	685
37 PIM Source-Speci€c Mode (PIM-SSM)..................................................................................................	686
Implementation Information.........................................................................................................................................	686
Important Points to Remember.............................................................................................................................	686

22 Contents

Configure PIM-SSM......................................................................................................................................................	687
Related Configuration Tasks...................................................................................................................................	687
Enabling PIM-SSM........................................................................................................................................................	687
Use PIM-SSM with IGMP Version 2 Hosts................................................................................................................	687
Configuring PIM-SSM with IGMPv2.....................................................................................................................	688
Electing an RP using the BSR Mechanism.................................................................................................................	689
Enabling RP to Server Specific Multicast Groups...............................................................................................	689
38 Port Monitoring........................................................................................................................................	691
Important Points to Remember....................................................................................................................................	691
Port Monitoring..............................................................................................................................................................	692
Configuring Port Monitoring........................................................................................................................................	693
Configuring Monitor Multicast Queue........................................................................................................................	694
Enabling Flow-Based Monitoring.................................................................................................................................	695
Remote Port Mirroring..................................................................................................................................................	696
Remote Port Mirroring Example............................................................................................................................	696
Configuring Remote Port Mirroring.......................................................................................................................	697
Displaying Remote-Port Mirroring Configurations...............................................................................................	699
Configuring the Sample Remote Port Mirroring..................................................................................................	699
Encapsulated Remote Port Monitoring.......................................................................................................................	702
ERPM Behavior on a typical Dell EMC Networking OS ...........................................................................................	704
Decapsulation of ERPM packets at the Destination IP/ Analyzer.....................................................................	704
Port Monitoring on VLT.................................................................................................................................................	705
VLT Non-fail over Scenario.....................................................................................................................................	705
VLT Fail-over Scenario............................................................................................................................................	706
RPM over VLT Scenarios........................................................................................................................................	706
39 Per-VLAN Spanning Tree Plus (PVST+)...................................................................................................	708
Protocol Overview.........................................................................................................................................................	708
Implementation Information..........................................................................................................................................	709
Configure Per-VLAN Spanning Tree Plus....................................................................................................................	709
Related Configuration Tasks...................................................................................................................................	709
Enabling PVST+.............................................................................................................................................................	709
Disabling PVST+.............................................................................................................................................................	710
Influencing PVST+ Root Selection...............................................................................................................................	710
Modifying Global PVST+ Parameters...........................................................................................................................	712
Modifying Interface PVST+ Parameters......................................................................................................................	713
Configuring an EdgePort...............................................................................................................................................	714
PVST+ in Multi-Vendor Networks................................................................................................................................	714
Enabling PVST+ Extend System ID..............................................................................................................................	714
PVST+ Sample Configurations......................................................................................................................................	715
40 Quality of Service (QoS)..........................................................................................................................	718
Implementation Information..........................................................................................................................................	720
Port-Based QoS Configurations..................................................................................................................................	720
Setting dot1p Priorities for Incoming Traffic.........................................................................................................	720

Contents 23

Honoring dot1p Priorities on Ingress Traffic...........................................................................................................	721
Configuring Port-Based Rate Policing...................................................................................................................	722
Configuring Port-Based Rate Shaping..................................................................................................................	722
Policy-Based QoS Configurations................................................................................................................................	723
Classify Traffic..........................................................................................................................................................	723
Dot1p to Queue Mapping Requirement.................................................................................................................	727
Create a QoS Policy.................................................................................................................................................	727
DSCP Color Maps....................................................................................................................................................	730
Create Policy Maps..................................................................................................................................................	732
Enabling QoS Rate Adjustment....................................................................................................................................	735
Enabling Strict-Priority Queueing................................................................................................................................	736
Queue Classification Requirements for PFC Functionality.......................................................................................	736
Support for marking dot1p value in L3 Input Qos Policy...........................................................................................	736
Weighted Random Early Detection..............................................................................................................................	737
Creating WRED Profiles..........................................................................................................................................	738
Applying a WRED Profile to Traffic........................................................................................................................	738
Displaying Default and Configured WRED Profiles..............................................................................................	739
Displaying WRED Drop Statistics...........................................................................................................................	739
Displaying egress–queue Statistics.......................................................................................................................	739
Pre-Calculating Available QoS CAM Space................................................................................................................	740
Specifying Policy-Based Rate Shaping in Packets Per Second................................................................................	741
Configuring Policy-Based Rate Shaping......................................................................................................................	741
Configuring Weights and ECN for WRED ..................................................................................................................	742
Global Service Pools With WRED and ECN Settings..........................................................................................	742
Configuring WRED and ECN Attributes......................................................................................................................	743
Guidelines for Configuring ECN for Classifying and Color-Marking Packets.........................................................	744
Sample configuration to mark non-ecn packets as “yellow” with Multiple traffic class..................................	745
Classifying Incoming Packets Using ECN and Color-Marking............................................................................	745
Sample configuration to mark non-ecn packets as “yellow” with single traffic class......................................	747
Applying Layer 2 Match Criteria on a Layer 3 Interface............................................................................................	748
Managing Hardware Buffer Statistics....................................................................................................................	748
Enabling Buffer Statistics Tracking .............................................................................................................................	749
41 Routing Information Protocol (RIP)..........................................................................................................	752
Protocol Overview.........................................................................................................................................................	752
RIPv1..........................................................................................................................................................................	752
RIPv2.........................................................................................................................................................................	752
Implementation Information..........................................................................................................................................	753
Configuration Information.............................................................................................................................................	753
Configuration Task List............................................................................................................................................	753
RIP Configuration Example.....................................................................................................................................	760
42 Remote Monitoring (RMON)...................................................................................................................	765
Implementation Information..........................................................................................................................................	765
Fault Recovery...............................................................................................................................................................	765
Setting the RMON Alarm........................................................................................................................................	766

24 Contents

Configuring an RMON Event.................................................................................................................................	766
Configuring RMON Collection Statistics...............................................................................................................	767
Configuring the RMON Collection History............................................................................................................	767
43 Rapid Spanning Tree Protocol (RSTP).....................................................................................................	769
Protocol Overview.........................................................................................................................................................	769
Configuring Rapid Spanning Tree.................................................................................................................................	769
Related Configuration Tasks...................................................................................................................................	769
Important Points to Remember....................................................................................................................................	769
RSTP and VLT..........................................................................................................................................................	770
Configuring Interfaces for Layer 2 Mode....................................................................................................................	770
Enabling Rapid Spanning Tree Protocol Globally.........................................................................................................	771
Adding and Removing Interfaces.................................................................................................................................	773
Modifying Global Parameters........................................................................................................................................	773
Enabling SNMP Traps for Root Elections and Topology Changes.....................................................................	775
Modifying Interface Parameters...................................................................................................................................	775
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................	775
Influencing RSTP Root Selection.................................................................................................................................	775
Configuring an EdgePort...............................................................................................................................................	776
Configuring Fast Hellos for Link State Detection.......................................................................................................	777
44 Software-De€ned Networking (SDN)......................................................................................................	778
45 Security...................................................................................................................................................	779
AAA Accounting.............................................................................................................................................................	779
Configuration Task List for AAA Accounting........................................................................................................	779
AAA Authentication........................................................................................................................................................	781
Configuration Task List for AAA Authentication...................................................................................................	782
Obscuring Passwords and Keys...................................................................................................................................	785
AAA Authorization.........................................................................................................................................................	785
Privilege Levels Overview.......................................................................................................................................	785
Configuration Task List for Privilege Levels..........................................................................................................	786
RADIUS...........................................................................................................................................................................	790
RADIUS Authentication...........................................................................................................................................	790
Configuration Task List for RADIUS.......................................................................................................................	791
Support for Change of Authorization and Disconnect Messages packets......................................................	795
TACACS+........................................................................................................................................................................	806
Configuration Task List for TACACS+...................................................................................................................	806
TACACS+ Remote Authentication........................................................................................................................	808
Command Authorization.........................................................................................................................................	809
Protection from TCP Tiny and Overlapping Fragment Attacks...............................................................................	809
Enabling SCP and SSH.................................................................................................................................................	809
Using SCP with SSH to Copy a Software Image.................................................................................................	810
Removing the RSA Host Keys and Zeroizing Storage .........................................................................................	811
Configuring When to Re-generate an SSH Key ...................................................................................................	811
Configuring the SSH Server Key Exchange Algorithm........................................................................................	812

Contents 25

Configuring the HMAC Algorithm for the SSH Server........................................................................................	812
Configuring the SSH Server Cipher List................................................................................................................	813
Configuring DNS in the SSH Server......................................................................................................................	813
Secure Shell Authentication....................................................................................................................................	814
Troubleshooting SSH................................................................................................................................................	816
Telnet................................................................................................................................................................................	816
VTY Line and Access-Class Configuration..................................................................................................................	817
VTY Line Local Authentication and Authorization................................................................................................	817
VTY Line Remote Authentication and Authorization...........................................................................................	818
VTY MAC-SA Filter Support...................................................................................................................................	818
Role-Based Access Control...........................................................................................................................................	818
Overview of RBAC...................................................................................................................................................	819
User Roles.................................................................................................................................................................	821
AAA Authentication and Authorization for Roles.................................................................................................	824
Role Accounting.......................................................................................................................................................	827
Display Information About User Roles...................................................................................................................	828
Two Factor Authentication (2FA)................................................................................................................................	829
Handling Access-Challenge Message...................................................................................................................	829
Configuring Challenge Response Authentication for SSHv2.............................................................................	829
SMS-OTP Mechanism............................................................................................................................................	830
Configuring the System to Drop Certain ICMP Reply Messages............................................................................	830
Dell EMC Networking OS Security Hardening...........................................................................................................	832
Dell EMC Networking OS Image Verification.......................................................................................................	832
Startup Configuration Verification.........................................................................................................................	833
Configuring the root User Password.....................................................................................................................	834
Locking Access to GRUB Interface.......................................................................................................................	835
Enabling User Lockout for Failed Login Attempts...............................................................................................	836
46 Service Provider Bridging........................................................................................................................	837
VLAN Stacking...............................................................................................................................................................	837
Important Points to Remember.............................................................................................................................	838
Configure VLAN Stacking.......................................................................................................................................	838
Creating Access and Trunk Ports..........................................................................................................................	839
Enable VLAN-Stacking for a VLAN.......................................................................................................................	840
Configuring the Protocol Type Value for the Outer VLAN Tag..........................................................................	840
Configuring Dell EMC Networking OS Options for Trunk Ports........................................................................	840
Debugging VLAN Stacking......................................................................................................................................	841
VLAN Stacking in Multi-Vendor Networks...........................................................................................................	842
VLAN Stacking Packet Drop Precedence..................................................................................................................	845
Enabling Drop Eligibility...........................................................................................................................................	845
Honoring the Incoming DEI Value..........................................................................................................................	846
Marking Egress Packets with a DEI Value............................................................................................................	847
Dynamic Mode CoS for VLAN Stacking.....................................................................................................................	847
Mapping C-Tag to S-Tag dot1p Values...................................................................................................................	848
Layer 2 Protocol Tunneling...........................................................................................................................................	849
Implementation Information....................................................................................................................................	851

26 Contents

Enabling Layer 2 Protocol Tunneling......................................................................................................................	851
Specifying a Destination MAC Address for BPDUs.............................................................................................	852
Setting Rate-Limit BPDUs......................................................................................................................................	852
Debugging Layer 2 Protocol Tunneling..................................................................................................................	853
Provider Backbone Bridging.........................................................................................................................................	853
47 sFlow.......................................................................................................................................................	854
Overview.........................................................................................................................................................................	854
Implementation Information..........................................................................................................................................	854
Important Points to Remember.............................................................................................................................	855
Enabling Extended sFlow..............................................................................................................................................	855
Enabling and Disabling sFlow on an Interface............................................................................................................	856
Enabling sFlow Max-Header Size Extended..............................................................................................................	856
sFlow Show Commands...............................................................................................................................................	857
Displaying Show sFlow Global................................................................................................................................	857
Displaying Show sFlow on an Interface................................................................................................................	858
Displaying Show sFlow on a Stack-unit................................................................................................................	858
Configuring Specify Collectors....................................................................................................................................	859
Changing the Polling Intervals......................................................................................................................................	859
Back-Off Mechanism....................................................................................................................................................	859
sFlow on LAG ports.......................................................................................................................................................	860
Enabling Extended sFlow..............................................................................................................................................	860
Important Points to Remember..............................................................................................................................	861
48 Simple Network Management Protocol (SNMP).....................................................................................	862
Protocol Overview.........................................................................................................................................................	863
Implementation Information..........................................................................................................................................	863
SNMPv3 Compliance With FIPS.................................................................................................................................	863
Configuration Task List for SNMP...............................................................................................................................	864
Related Configuration Tasks...................................................................................................................................	864
Important Points to Remember...................................................................................................................................	865
Set up SNMP.................................................................................................................................................................	865
Creating a Community............................................................................................................................................	865
Setting Up User-Based Security (SNMPv3).......................................................................................................	865
Reading Managed Object Values.................................................................................................................................	867
Writing Managed Object Values...................................................................................................................................	867
Configuring Contact and Location Information using SNMP...................................................................................	868
Subscribing to Managed Object Value Updates using SNMP.................................................................................	868
Enabling a Subset of SNMP Traps..............................................................................................................................	869
Enabling an SNMP Agent to Notify Syslog Server Failure........................................................................................	873
Copy Configuration Files Using SNMP........................................................................................................................	874
Copying a Configuration File...................................................................................................................................	875
Copying Configuration Files via SNMP.................................................................................................................	876
Copying the Startup-Config Files to the Running-Config..................................................................................	876
Copying the Startup-Config Files to the Server via FTP....................................................................................	877
Copying the Startup-Config Files to the Server via TFTP..................................................................................	877

Contents 27

Copy a Binary File to the Startup-Configuration..................................................................................................	878
Additional MIB Objects to View Copy Statistics..................................................................................................	878
Obtaining a Value for MIB Objects.........................................................................................................................	879
MIB Support to Display Reason for Last System Reboot.........................................................................................	879
Viewing the Reason for Last System Reboot Using SNMP...............................................................................	880
MIB Support for Power Monitoring.............................................................................................................................	880
MIB Support to Display the Available Memory Size on Flash...................................................................................	881
Viewing the Available Flash Memory Size.............................................................................................................	881
MIB Support to Display the Software Core Files Generated by the System..........................................................	881
Viewing the Software Core Files Generated by the System..............................................................................	882
SNMP Support for WRED Green/Yellow/Red Drop Counters................................................................................	882
MIB Support to Display the Available Partitions on Flash.........................................................................................	883
Viewing the Available Partitions on Flash.............................................................................................................	884
MIB Support to Display Egress Queue Statistics.......................................................................................................	885
MIB Support to ECMP Group Count..........................................................................................................................	885
Viewing the ECMP Group Count Information......................................................................................................	885
MIB Support for entAliasMappingTable .....................................................................................................................	888
Viewing the entAliasMappingTable MIB................................................................................................................	888
MIB Support for LAG....................................................................................................................................................	888
Viewing the LAG MIB..............................................................................................................................................	890
MIB Support to Display Unrecognized LLDP TLVs...................................................................................................	890
MIB Support to Display Reserved Unrecognized LLDP TLVs............................................................................	890
MIB Support to Display Organizational Specific Unrecognized LLDP TLVs......................................................	891
MIB Support to Display Unrecognized LLDP TLVs....................................................................................................	892
Viewing the Details of Reserved Unrecognized LLDP TLVs..............................................................................	892
MIB Support for LLDP Notification Interval...............................................................................................................	893
Manage VLANs using SNMP.......................................................................................................................................	893
Creating a VLAN......................................................................................................................................................	893
Assigning a VLAN Alias...........................................................................................................................................	893
Displaying the Ports in a VLAN..............................................................................................................................	894
Add Tagged and Untagged Ports to a VLAN.......................................................................................................	894
Managing Overload on Startup....................................................................................................................................	895
Enabling and Disabling a Port using SNMP................................................................................................................	895
Fetch Dynamic MAC Entries using SNMP.................................................................................................................	896
Example of Deriving the Interface Index Number......................................................................................................	897
MIB Objects for Viewing the System Image on Flash Partitions.......................................................................	897
Monitoring BGP sessions via SNMP...........................................................................................................................	897
Monitor Port-Channels.................................................................................................................................................	899
Troubleshooting SNMP Operation..............................................................................................................................	900
Transceiver Monitoring..................................................................................................................................................	901
49 Stacking..................................................................................................................................................	903
Stacking Overview........................................................................................................................................................	903
Stack Management Roles.......................................................................................................................................	903
Stack Master Election.............................................................................................................................................	904
Virtual IP...................................................................................................................................................................	905

28 Contents

Failover Roles...........................................................................................................................................................	905
MAC Addressing on Stacks....................................................................................................................................	905
Stacking LAG...........................................................................................................................................................	906
Supported Stacking Topologies.............................................................................................................................	906
High Availability on Stacks......................................................................................................................................	907
Management Access on Stacks.............................................................................................................................	907
Important Points to Remember...................................................................................................................................	908
Stacking Installation Tasks............................................................................................................................................	908
Create a Stack.........................................................................................................................................................	908
Add Units to an Existing Stack...............................................................................................................................	912
Split a Stack..............................................................................................................................................................	914
Stacking Configuration Tasks........................................................................................................................................	914
Assigning Unit Numbers to Units in an Stack.......................................................................................................	915
Creating a Virtual Stack Unit on a Stack...............................................................................................................	915
Displaying Information about a Stack.....................................................................................................................	915
Influencing Management Unit Selection on a Stack............................................................................................	917
Managing Redundancy on a Stack.........................................................................................................................	917
Resetting a Unit on a Stack....................................................................................................................................	918
Verify a Stack Configuration.........................................................................................................................................	918
Displaying the Status of Stacking Ports................................................................................................................	918
Remove Units or Front End Ports from a Stack.........................................................................................................	919
Removing a Unit from a Stack................................................................................................................................	919
Removing Front End Port Stacking.......................................................................................................................	919
Troubleshoot a Stack.....................................................................................................................................................	920
Recover from Stack Link Flaps..............................................................................................................................	920
Recover from a Card Problem State on a Stack..................................................................................................	920
50 Storm Control..........................................................................................................................................	921
Configure Storm Control...............................................................................................................................................	921
Configuring Storm Control from INTERFACE Mode............................................................................................	921
Configuring Storm Control from CONFIGURATION Mode................................................................................	922
Detect PFC Storm.........................................................................................................................................................	922
Restore Queue Drop State...........................................................................................................................................	923
PFC Storm......................................................................................................................................................................	923
View Details of Storm Control PFC.............................................................................................................................	923
51 Spanning Tree Protocol (STP)..................................................................................................................	925
Protocol Overview.........................................................................................................................................................	925
Configure Spanning Tree...............................................................................................................................................	926
Related Configuration Tasks...................................................................................................................................	926
Important Points to Remember...................................................................................................................................	926
Configuring Interfaces for Layer 2 Mode....................................................................................................................	927
Enabling Spanning Tree Protocol Globally...................................................................................................................	928
Adding an Interface to the Spanning Tree Group......................................................................................................	930
Modifying Global Parameters.......................................................................................................................................	930
Modifying Interface STP Parameters...........................................................................................................................	931

Contents 29

Enabling PortFast...........................................................................................................................................................	931
Prevent Network Disruptions with BPDU Guard.................................................................................................	932
Selecting STP Root.......................................................................................................................................................	934
STP Root Guard.............................................................................................................................................................	934
Root Guard Scenario...............................................................................................................................................	934
Configuring Root Guard..........................................................................................................................................	935
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................	936
Configuring Spanning Trees as Hitless........................................................................................................................	936
STP Loop Guard.............................................................................................................................................................	936
Configuring Loop Guard..........................................................................................................................................	938
Displaying STP Guard Configuration...........................................................................................................................	938
52 SupportAssist..........................................................................................................................................	940
Configuring SupportAssist Using a Configuration Wizard.........................................................................................	941
Configuring SupportAssist Manually............................................................................................................................	941
Configuring SupportAssist Activity.............................................................................................................................	943
Configuring SupportAssist Company..........................................................................................................................	944
Configuring SupportAssist Person..............................................................................................................................	945
Configuring SupportAssist Server...............................................................................................................................	945
Viewing SupportAssist Configuration.........................................................................................................................	946
53 System Time and Date.............................................................................................................................	948
Network Time Protocol.................................................................................................................................................	948
Protocol Overview...................................................................................................................................................	949
Configure the Network Time Protocol..................................................................................................................	949
Enabling NTP...........................................................................................................................................................	950
Configuring NTP Broadcasts.................................................................................................................................	950
Disabling NTP on an Interface................................................................................................................................	951
Configuring a Source IP Address for NTP Packets..............................................................................................	951
Configuring NTP Authentication............................................................................................................................	951
Configuring NTP control key password................................................................................................................	954
Dell EMC Networking OS Time and Date...................................................................................................................	954
Configuration Task List ..........................................................................................................................................	954
Setting the Time and Date for the Switch Software Clock...............................................................................	954
Setting the Timezone..............................................................................................................................................	955
Set Daylight Saving Time........................................................................................................................................	955
Setting Daylight Saving Time Once.......................................................................................................................	955
Setting Recurring Daylight Saving Time...............................................................................................................	956
54 Tunneling.................................................................................................................................................	958
Configuring a Tunnel.....................................................................................................................................................	958
Configuring Tunnel Keepalive Settings........................................................................................................................	959
Configuring a Tunnel Interface.....................................................................................................................................	960
Configuring Tunnel Allow-Remote Decapsulation......................................................................................................	960
Configuring Tunnel source anylocal Decapsulation....................................................................................................	961
Guidelines for Configuring Multipoint Receive-Only Tunnels....................................................................................	961

30 Contents