Dell Z9000 Configuration Manual

Dell Configuration Guide for the Z9000
System

9.7(0.0)

Notes, Cautions, and Warnings

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

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 © 2015 Dell Inc. All rights reserved. This product is protected by U.S. and international copyright and

intellectual property laws. Dell™ and the Dell logo are trademarks of Dell Inc. in the United States and/or other
jurisdictions. All other marks and names mentioned herein may be trademarks of their respective companies.

2015 - 02

Rev. A00

Contents

1 About this Guide..................................................................................................31

Audience.............................................................................................................................................. 31

Conventions.........................................................................................................................................31

Related Documents.............................................................................................................................31

2 Configuration Fundamentals........................................................................... 32

Accessing the Command Line............................................................................................................32

CLI Modes............................................................................................................................................32

Navigating CLI Modes................................................................................................................... 34

The do Command............................................................................................................................... 37

Undoing Commands...........................................................................................................................38

Obtaining Help.................................................................................................................................... 39

Entering and Editing Commands....................................................................................................... 39

Command History.............................................................................................................................. 40

Filtering show Command Outputs.....................................................................................................40

Multiple Users in Configuration Mode............................................................................................... 42

3 Getting Started....................................................................................................43

Console Access...................................................................................................................................43

Serial Console................................................................................................................................43

Accessing the CLI Interface and Running Scripts Using SSH............................................................44

Entering CLI commands Using an SSH Connection....................................................................45

Executing Local CLI Scripts Using an SSH Connection...............................................................45

Default Configuration......................................................................................................................... 46

Configuring a Host Name...................................................................................................................46

Accessing the System Remotely........................................................................................................ 46

Accessing the System Remotely...................................................................................................46

Configure the Management Port IP Address............................................................................... 46

Configure a Management Route.................................................................................................. 47

Configuring a Username and Password.......................................................................................47

Configuring the Enable Password...................................................................................................... 47

Configuration File Management.........................................................................................................48

Copy Files to and from the System.............................................................................................. 48

Mounting an NFS File System....................................................................................................... 49

Save the Running-Configuration.................................................................................................. 51

Configure the Overload Bit for a Startup Scenario...................................................................... 51

Viewing Files...................................................................................................................................51

Managing the File System................................................................................................................... 53

Enabling Software Features on Devices Using a Command Option................................................ 54

View Command History......................................................................................................................55

Upgrading Dell Networking OS.......................................................................................................... 55

Using HTTP for File Transfers............................................................................................................. 55

Using Hashes to Validate Software Images........................................................................................55

4 Management........................................................................................................57

Configuring Privilege Levels................................................................................................................57

Creating a Custom Privilege Level................................................................................................57

Removing a Command from EXEC Mode....................................................................................57

Moving a Command from EXEC Privilege Mode to EXEC Mode................................................ 58

Allowing Access to CONFIGURATION Mode Commands.......................................................... 58

Allowing Access to the Following Modes.................................................................................... 58

Applying a Privilege Level to a Username.................................................................................... 60

Applying a Privilege Level to a Terminal Line...............................................................................60

Configuring Logging...........................................................................................................................60

Audit and Security Logs.................................................................................................................61

Configuring Logging Format ...................................................................................................... 63

Setting Up a Secure Connection to a Syslog Server....................................................................63

Log Messages in the Internal Buffer...................................................................................................64

Configuration Task List for System Log Management................................................................ 64

Disabling System Logging.................................................................................................................. 64

Sending System Messages to a Syslog Server....................................................................................65

Configuring a UNIX System as a Syslog Server............................................................................65

Changing System Logging Settings....................................................................................................65

Display the Logging Buffer and the Logging Configuration............................................................. 66

Configuring a UNIX Logging Facility Level.........................................................................................67

Synchronizing Log Messages............................................................................................................. 68

Enabling Timestamp on Syslog Messages......................................................................................... 68

File Transfer Services.......................................................................................................................... 69

Configuration Task List for File Transfer Services........................................................................69

Enabling the FTP Server................................................................................................................ 69

Configuring FTP Server Parameters............................................................................................. 70

Configuring FTP Client Parameters..............................................................................................70

Terminal Lines......................................................................................................................................71

Denying and Permitting Access to a Terminal Line......................................................................71

Configuring Login Authentication for Terminal Lines..................................................................71

Setting Time Out of EXEC Privilege Mode..........................................................................................72

Using Telnet to get to Another Network Device................................................................................73

Lock CONFIGURATION Mode............................................................................................................74

Viewing the Configuration Lock Status........................................................................................ 74

Recovering from a Forgotten Password on the Z9000 System........................................................75

Recovering from a Forgotten Enable Password on the Z9000.................................................. 76

Recovering from a Failed Start on the Z9000 System.......................................................................77

Restoring the Factory Default Settings...............................................................................................78

Important Points to Remember....................................................................................................78

Restoring Factory Default Environment Variables....................................................................... 78

5 802.1X................................................................................................................... 81

The Port-Authentication Process.......................................................................................................82

EAP over RADIUS...........................................................................................................................84

Configuring 802.1X............................................................................................................................. 84

Related Configuration Tasks.........................................................................................................84

Important Points to Remember..........................................................................................................85

Enabling 802.1X...................................................................................................................................85

Configuring Request Identity Re-Transmissions............................................................................... 87

Configuring a Quiet Period after a Failed Authentication........................................................... 87

Forcibly Authorizing or Unauthorizing a Port....................................................................................88

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)............................................................................................................ 95

CAM Usage....................................................................................................................................96

Implementing ACLs on Dell Networking OS................................................................................97

IP Fragment Handling......................................................................................................................... 98

IP Fragments ACL Examples......................................................................................................... 98

Layer 4 ACL Rules Examples.........................................................................................................99

Configure a Standard IP ACL............................................................................................................100

Configuring a Standard IP ACL Filter.......................................................................................... 101

Configure an Extended IP ACL......................................................................................................... 102

Configuring Filters with a Sequence Number............................................................................102

Configuring Filters Without a Sequence Number......................................................................103

Configure Layer 2 and Layer 3 ACLs................................................................................................104

Assign an IP ACL to an Interface...................................................................................................... 105

Applying an IP ACL............................................................................................................................105

Counting ACL Hits.......................................................................................................................106

Configure Ingress ACLs.................................................................................................................... 106

Configure Egress ACLs......................................................................................................................107

Applying Egress Layer 3 ACLs (Control-Plane).......................................................................... 108

IP Prefix Lists......................................................................................................................................109

Implementation Information...................................................................................................... 109

Configuration Task List for Prefix Lists....................................................................................... 109

ACL Resequencing.............................................................................................................................113

Resequencing an ACL or Prefix List............................................................................................ 114

Route Maps........................................................................................................................................ 115

Implementation Information.......................................................................................................116

Important Points to Remember........................................................................................................ 116

Configuration Task List for Route Maps......................................................................................116

Configuring Match Routes.......................................................................................................... 118

Configuring Set Conditions........................................................................................................ 120

Configure a Route Map for Route Redistribution.......................................................................121

Configure a Route Map for Route Tagging................................................................................ 122

Continue Clause..........................................................................................................................122

Logging of ACL Processes................................................................................................................ 122

Guidelines for Configuring ACL Logging......................................................................................... 123

Configuring ACL Logging................................................................................................................. 124

Flow-Based Monitoring Support for ACLs....................................................................................... 125

Behavior of Flow-Based Monitoring...........................................................................................125

Enabling Flow-Based Monitoring..................................................................................................... 127

7 Access Control List (ACL) VLAN Groups and Content Addressable

Memory (CAM)......................................................................................................129

Optimizing CAM Utilization During the Attachment of ACLs to VLANs......................................... 129

Guidelines for Configuring ACL VLAN groups.................................................................................130

Configuring ACL VLAN Groups and Configuring FP Blocks for VLAN Parameters.........................131

Configuring ACL VLAN Groups................................................................................................... 131

Configuring FP Blocks for VLAN Parameters............................................................................. 132

Viewing CAM Usage.......................................................................................................................... 133

Allocating FP Blocks for VLAN Processes.........................................................................................134

8 Bidirectional Forwarding Detection (BFD)...................................................136

How BFD Works................................................................................................................................ 136

BFD Packet Format......................................................................................................................137

BFD Sessions................................................................................................................................139

BFD Three-Way Handshake........................................................................................................139

Session State Changes................................................................................................................140

Important Points to Remember........................................................................................................ 141

Configure BFD................................................................................................................................... 141

Configure BFD for Physical Ports............................................................................................... 142

Configure BFD for Static Routes.................................................................................................145

Configure BFD for OSPF..............................................................................................................147

Configure BFD for OSPFv3......................................................................................................... 150

Configure BFD for IS-IS............................................................................................................... 151

Configure BFD for BGP............................................................................................................... 154

Configure BFD for VRRP..............................................................................................................161

Configuring Protocol Liveness................................................................................................... 164

Troubleshooting BFD..................................................................................................................164

9 Border Gateway Protocol IPv4 (BGPv4).......................................................166

Autonomous Systems (AS)................................................................................................................166

Sessions and Peers............................................................................................................................168

Establish a Session.......................................................................................................................169

Route Reflectors................................................................................................................................169

BGP Attributes................................................................................................................................... 170

Best Path Selection Criteria......................................................................................................... 171

Weight.......................................................................................................................................... 173

Local Preference..........................................................................................................................173

Multi-Exit Discriminators (MEDs)................................................................................................ 174

Origin............................................................................................................................................175

AS Path......................................................................................................................................... 176

Next Hop......................................................................................................................................176

Multiprotocol BGP............................................................................................................................. 177

Implement BGP with Dell Networking OS........................................................................................177

Additional Path (Add-Path) Support............................................................................................177

Advertise IGP Cost as MED for Redistributed Routes.................................................................177

Ignore Router-ID for Some Best-Path Calculations..................................................................178

Four-Byte AS Numbers................................................................................................................178

AS4 Number Representation.......................................................................................................179

AS Number Migration..................................................................................................................180

BGP4 Management Information Base (MIB).............................................................................. 182

Important Points to Remember..................................................................................................182

Configuration Information................................................................................................................183

BGP Configuration............................................................................................................................ 183

Enabling BGP...............................................................................................................................184

Configuring AS4 Number Representations................................................................................188

Configuring Peer Groups............................................................................................................190

Configuring BGP Fast Fall-Over..................................................................................................192

Configuring Passive Peering....................................................................................................... 194

Maintaining Existing AS Numbers During an AS Migration........................................................195

Allowing an AS Number to Appear in its Own AS Path..............................................................196

Enabling Graceful Restart............................................................................................................197

Enabling Neighbor Graceful Restart...........................................................................................198

Filtering on an AS-Path Attribute................................................................................................198

Regular Expressions as Filters.................................................................................................... 200

Redistributing Routes..................................................................................................................201

Enabling Additional Paths...........................................................................................................202

Configuring IP Community Lists................................................................................................ 202

Configuring an IP Extended Community List............................................................................ 204

Filtering Routes with Community Lists...................................................................................... 205

Manipulating the COMMUNITY Attribute.................................................................................. 205

Changing MED Attributes........................................................................................................... 207

Changing the LOCAL_PREFERENCE Attribute.......................................................................... 207

Changing the NEXT_HOP Attribute...........................................................................................208

Changing the WEIGHT Attribute................................................................................................209

Enabling Multipath......................................................................................................................209

Filtering BGP Routes...................................................................................................................209

Filtering BGP Routes Using Route Maps.....................................................................................211

Filtering BGP Routes Using AS-PATH Information.................................................................... 212

Configuring BGP Route Reflectors.............................................................................................212

Aggregating Routes.....................................................................................................................213

Configuring BGP Confederations...............................................................................................214

Enabling Route Flap Dampening................................................................................................ 214

Changing BGP Timers................................................................................................................. 217

Enabling BGP Neighbor Soft-Reconfiguration...........................................................................217

Route Map Continue...................................................................................................................219

Enabling MBGP Configurations........................................................................................................ 219

BGP Regular Expression Optimization.............................................................................................220

Debugging BGP................................................................................................................................ 220

Storing Last and Bad PDUs..........................................................................................................221

Capturing PDUs...........................................................................................................................222

PDU Counters............................................................................................................................. 223

Sample Configurations..................................................................................................................... 223

10 Content Addressable Memory (CAM).........................................................230

CAM Allocation................................................................................................................................. 230

Test CAM Usage................................................................................................................................232

View CAM Profiles.............................................................................................................................232

View CAM-ACL Settings................................................................................................................... 233

View CAM Usage...............................................................................................................................235

CAM Optimization.............................................................................................................................235

Troubleshoot CAM Profiling.............................................................................................................236

CAM Profile Mismatches.............................................................................................................236

QoS CAM Region Limitation.......................................................................................................236

11 Control Plane Policing (CoPP)......................................................................237

Configure Control Plane Policing.................................................................................................... 238

Configuring CoPP for Protocols................................................................................................ 239

Configuring CoPP for CPU Queues........................................................................................... 241

CoPP for OSPFv3 Packets...........................................................................................................242

Configuring CoPP for OSPFv3....................................................................................................245

Show Commands....................................................................................................................... 246

12 Dynamic Host Configuration Protocol (DHCP)........................................248

DHCP Packet Format and Options.................................................................................................. 248

Assign an IP Address using DHCP....................................................................................................250

Implementation Information............................................................................................................ 251

Configure the System to be a DHCP Server.................................................................................... 252

Configuring the Server for Automatic Address Allocation........................................................ 252

Specifying a Default Gateway.....................................................................................................254

Configure a Method of Hostname Resolution.......................................................................... 254

Using DNS for Address Resolution.............................................................................................254

Using NetBIOS WINS for Address Resolution............................................................................ 254

Creating Manual Binding Entries................................................................................................ 254

Debugging the DHCP Server......................................................................................................255

Using DHCP Clear Commands...................................................................................................255

Configure the System to be a Relay Agent......................................................................................255

Configure the System to be a DHCP Client.....................................................................................257

DHCP Client on a Management Interface................................................................................. 258

DHCP Client Operation with Other Features............................................................................ 258

Configure the System for User Port Stacking (Option 230)............................................................259

Configure Secure DHCP...................................................................................................................259

Option 82....................................................................................................................................260

DHCP Snooping..........................................................................................................................260

Drop DHCP Packets on Snooped VLANs Only..........................................................................264

Dynamic ARP Inspection............................................................................................................ 264

Configuring Dynamic ARP Inspection........................................................................................265

Source Address Validation................................................................................................................266

Enabling IP Source Address Validation.......................................................................................267

DHCP MAC Source Address Validation......................................................................................267

Enabling IP+MAC Source Address Validation............................................................................ 267

Viewing the Number of SAV Dropped Packets..........................................................................268

Clearing the Number of SAV Dropped Packets.........................................................................269

13 Equal Cost Multi-Path (ECMP)..................................................................... 270

ECMP for Flow-Based Affinity.......................................................................................................... 270

Configuring the Hash Algorithm................................................................................................ 270

Enabling Deterministic ECMP Next Hop....................................................................................270

Configuring the Hash Algorithm Seed........................................................................................271

Link Bundle Monitoring..................................................................................................................... 271

Managing ECMP Group Paths.................................................................................................... 272

Creating an ECMP Group Bundle...............................................................................................272

Modifying the ECMP Group Threshold...................................................................................... 273

14 Enabling FIPS Cryptography........................................................................ 274

Configuration Tasks..........................................................................................................................274

Preparing the System........................................................................................................................274

Enabling FIPS Mode.......................................................................................................................... 275

Generating Host-Keys.......................................................................................................................275

Monitoring FIPS Mode Status........................................................................................................... 276

Disabling FIPS Mode......................................................................................................................... 276

15 Force10 Resilient Ring Protocol (FRRP)..................................................... 278

Protocol Overview............................................................................................................................ 278

Ring Status...................................................................................................................................279

Multiple FRRP Rings....................................................................................................................280

Important FRRP Points............................................................................................................... 280

Important FRRP Concepts..........................................................................................................280

Implementing FRRP.......................................................................................................................... 282

FRRP Configuration.......................................................................................................................... 282

Creating the FRRP Group........................................................................................................... 282

Configuring the Control VLAN................................................................................................... 283

Configuring and Adding the Member VLANs............................................................................ 284

Setting the FRRP Timers............................................................................................................. 285

Clearing the FRRP Counters.......................................................................................................285

Viewing the FRRP Configuration................................................................................................286

Viewing the FRRP Information................................................................................................... 286

Troubleshooting FRRP......................................................................................................................286

Configuration Checks.................................................................................................................286

Sample Configuration and Topology.............................................................................................. 286

16 GARP VLAN Registration Protocol (GVRP)................................................289

Important Points to Remember....................................................................................................... 289

Configure GVRP................................................................................................................................290

Related Configuration Tasks...................................................................................................... 290

Enabling GVRP Globally....................................................................................................................291

Enabling GVRP on a Layer 2 Interface..............................................................................................291

Configure GVRP Registration........................................................................................................... 291

Configure a GARP Timer.................................................................................................................. 292

17 Internet Group Management Protocol (IGMP).........................................294

IGMP Implementation Information..................................................................................................294

IGMP Protocol Overview..................................................................................................................294

IGMP Version 2............................................................................................................................294

IGMP Version 3............................................................................................................................296

Configure IGMP................................................................................................................................ 299

Related Configuration Tasks...................................................................................................... 299

Viewing IGMP Enabled Interfaces....................................................................................................300

Selecting an IGMP Version...............................................................................................................300

Viewing IGMP Groups.......................................................................................................................301

Adjusting Timers................................................................................................................................301

Adjusting Query and Response Timers...................................................................................... 301

Adjusting the IGMP Querier Timeout Value...............................................................................302

Configuring a Static IGMP Group.................................................................................................... 302

Enabling IGMP Immediate-Leave.................................................................................................... 303

IGMP Snooping.................................................................................................................................303

IGMP Snooping Implementation Information...........................................................................303

Configuring IGMP Snooping...................................................................................................... 303

Removing a Group-Port Association.........................................................................................304

Disabling Multicast Flooding...................................................................................................... 304

Specifying a Port as Connected to a Multicast Router..............................................................305

Configuring the Switch as Querier.............................................................................................305

Fast Convergence after MSTP Topology Changes......................................................................... 306

Egress Interface Selection (EIS) for HTTP and IGMP Applications................................................. 306

Protocol Separation.................................................................................................................... 307

Enabling and Disabling Management Egress Interface Selection............................................ 308

Handling of Management Route Configuration........................................................................309

Handling of Switch-Initiated Traffic...........................................................................................309

Handling of Switch-Destined Traffic..........................................................................................310

Handling of Transit Traffic (Traffic Separation)...........................................................................311

Mapping of Management Applications and Traffic Type........................................................... 311

Behavior of Various Applications for Switch-Initiated Traffic ...................................................312

Behavior of Various Applications for Switch-Destined Traffic ................................................. 313

Interworking of EIS With Various Applications...........................................................................314

Designating a Multicast Router Interface......................................................................................... 315

18 Interfaces......................................................................................................... 316

Basic Interface Configuration...........................................................................................................316

Advanced Interface Configuration................................................................................................... 316

Interface Types.................................................................................................................................. 317

View Basic Interface Information......................................................................................................317

Enabling a Physical Interface............................................................................................................ 319

Physical Interfaces.............................................................................................................................319

Configuration Task List for Physical Interfaces..........................................................................320

Overview of Layer Modes...........................................................................................................320

Configuring Layer 2 (Data Link) Mode....................................................................................... 320

Configuring Layer 2 (Interface) Mode.........................................................................................321

Configuring Layer 3 (Network) Mode......................................................................................... 321

Configuring Layer 3 (Interface) Mode........................................................................................ 322

Egress Interface Selection (EIS)........................................................................................................ 322

Important Points to Remember..................................................................................................323

Configuring EIS........................................................................................................................... 323

Management Interfaces....................................................................................................................323

Configuring Management Interfaces......................................................................................... 323

Configuring Management Interfaces on the S-Series...............................................................324

VLAN Interfaces.................................................................................................................................325

Loopback Interfaces......................................................................................................................... 325

Null Interfaces...................................................................................................................................326

Port Channel Interfaces....................................................................................................................326

Port Channel Definition and Standards......................................................................................326

Port Channel Benefits................................................................................................................. 327

Port Channel Implementation.................................................................................................... 327

10/100/1000 Mbps Interfaces in Port Channels........................................................................328

Configuration Tasks for Port Channel Interfaces...................................................................... 328

Creating a Port Channel............................................................................................................. 328

Adding a Physical Interface to a Port Channel.......................................................................... 329

Reassigning an Interface to a New Port Channel...................................................................... 331

Configuring the Minimum Oper Up Links in a Port Channel.................................................... 332

..................................................................................................................................................... 332

Assigning an IP Address to a Port Channel................................................................................ 333

Deleting or Disabling a Port Channel.........................................................................................333

Load Balancing Through Port Channels.................................................................................... 333

Load-Balancing Method............................................................................................................. 333

Changing the Hash Algorithm....................................................................................................334

Bulk Configuration............................................................................................................................335

Interface Range........................................................................................................................... 335

Bulk Configuration Examples..................................................................................................... 336

Defining Interface Range Macros.....................................................................................................337

Define the Interface Range.........................................................................................................338

Choosing an Interface-Range Macro........................................................................................ 338

Monitoring and Maintaining Interfaces............................................................................................338

Maintenance Using TDR............................................................................................................. 339

Splitting QSFP Ports to SFP+ Ports.................................................................................................. 340

Converting a QSFP or QSFP+ Port to an SFP or SFP+ Port............................................................340

Important Points to Remember..................................................................................................341

Support for LM4 Optics.............................................................................................................. 342

Example Scenarios......................................................................................................................342

Link Dampening................................................................................................................................346

Important Points to Remember................................................................................................. 346

Enabling Link Dampening...........................................................................................................346

Link Bundle Monitoring.................................................................................................................... 348

Using Ethernet Pause Frames for Flow Control.............................................................................. 348

Enabling Pause Frames...............................................................................................................349

Configure the MTU Size on an Interface......................................................................................... 349

Port-Pipes......................................................................................................................................... 350

Auto-Negotiation on Ethernet Interfaces........................................................................................ 351

Setting the Speed and Duplex Mode of Ethernet Interfaces..................................................... 351

Set Auto-Negotiation Options....................................................................................................353

View Advanced Interface Information............................................................................................. 354

Configuring the Interface Sampling Size................................................................................... 354

Dynamic Counters............................................................................................................................356

Clearing Interface Counters....................................................................................................... 356

Enhanced Validation of Interface Ranges........................................................................................ 357

19 Internet Protocol Security (IPSec)...............................................................358

Configuring IPSec ............................................................................................................................ 359

20 IPv4 Routing................................................................................................... 360

IP Addresses......................................................................................................................................360

Implementation Information......................................................................................................360

Configuration Tasks for IP Addresses.............................................................................................. 360

Assigning IP Addresses to an Interface.............................................................................................361

Configuring Static Routes.................................................................................................................362

Configure Static Routes for the Management Interface.................................................................364

IPv4 Path MTU Discovery Overview.................................................................................................364

Using the Configured Source IP Address in ICMP Messages..........................................................365

Configuring the ICMP Source Interface.....................................................................................365

Configuring the Duration to Establish a TCP Connection..............................................................366

Enabling Directed Broadcast............................................................................................................366

Resolution of Host Names................................................................................................................367

Enabling Dynamic Resolution of Host Names.................................................................................367

Specifying the Local System Domain and a List of Domains..........................................................368

Configuring DNS with Traceroute................................................................................................... 368

ARP.................................................................................................................................................... 369

Configuration Tasks for ARP............................................................................................................ 369

Configuring Static ARP Entries......................................................................................................... 370

Enabling Proxy ARP...........................................................................................................................370

Clearing ARP Cache..........................................................................................................................370

ARP Learning via Gratuitous ARP......................................................................................................371

Enabling ARP Learning via Gratuitous ARP.......................................................................................371

ARP Learning via ARP Request..........................................................................................................372

Configuring ARP Retries....................................................................................................................372

ICMP.................................................................................................................................................. 373

Configuration Tasks for ICMP...........................................................................................................373

Enabling ICMP Unreachable Messages............................................................................................373

UDP Helper........................................................................................................................................374

Configure UDP Helper................................................................................................................ 374

Important Points to Remember..................................................................................................374

Enabling UDP Helper........................................................................................................................ 374

Configuring a Broadcast Address.....................................................................................................375

Configurations Using UDP Helper....................................................................................................375

UDP Helper with Broadcast-All Addresses...................................................................................... 376

UDP Helper with Subnet Broadcast Addresses................................................................................376

UDP Helper with Configured Broadcast Addresses.........................................................................377

UDP Helper with No Configured Broadcast Addresses.................................................................. 378

Troubleshooting UDP Helper...........................................................................................................378

21 IPv6 Routing.................................................................................................... 379

Protocol Overview............................................................................................................................ 379

Extended Address Space.............................................................................................................379

Stateless Autoconfiguration........................................................................................................379

IPv6 Headers............................................................................................................................... 380

IPv6 Header Fields.......................................................................................................................381

Extension Header Fields..............................................................................................................382

Addressing...................................................................................................................................383

Implementing IPv6 with Dell Networking OS..................................................................................385

ICMPv6.............................................................................................................................................. 387

Path MTU Discovery..........................................................................................................................387

IPv6 Neighbor Discovery..................................................................................................................388

IPv6 Neighbor Discovery of MTU Packets.................................................................................389

Configuration Task List for IPv6 RDNSS.......................................................................................... 389

Configuring the IPv6 Recursive DNS Server.............................................................................. 389

Debugging IPv6 RDNSS Information Sent to the Host ............................................................ 390

Displaying IPv6 RDNSS Information........................................................................................... 391

Secure Shell (SSH) Over an IPv6 Transport...................................................................................... 391

Configuration Tasks for IPv6............................................................................................................ 392

Adjusting Your CAM-Profile........................................................................................................392

Assigning an IPv6 Address to an Interface.................................................................................393

Assigning a Static IPv6 Route..................................................................................................... 393

Configuring Telnet with IPv6......................................................................................................394

SNMP over IPv6...........................................................................................................................394

Showing IPv6 Information..........................................................................................................394

Showing an IPv6 Interface..........................................................................................................395

Showing IPv6 Routes..................................................................................................................396

Showing the Running-Configuration for an Interface.............................................................. 397

Clearing IPv6 Routes...................................................................................................................397

Configuring IPv6 RA Guard.............................................................................................................. 398

Configuring IPv6 RA Guard on an Interface..............................................................................400

Monitoring IPv6 RA Guard..........................................................................................................400

22 Intermediate System to Intermediate System.......................................... 401

IS-IS Protocol Overview................................................................................................................... 401

IS-IS Addressing................................................................................................................................ 401

Multi-Topology IS-IS........................................................................................................................ 402

Transition Mode..........................................................................................................................403

Interface Support........................................................................................................................403

Adjacencies................................................................................................................................. 403

Graceful Restart................................................................................................................................403

Timers..........................................................................................................................................404

Implementation Information........................................................................................................... 404

Configuration Information............................................................................................................... 405

Configuration Tasks for IS-IS..................................................................................................... 405

Configuring the Distance of a Route..........................................................................................414

Changing the IS-Type................................................................................................................. 414

Redistributing IPv4 Routes.......................................................................................................... 417

Redistributing IPv6 Routes..........................................................................................................418

Configuring Authentication Passwords......................................................................................418

Setting the Overload Bit..............................................................................................................419

Debugging IS-IS..........................................................................................................................420

IS-IS Metric Styles..............................................................................................................................421

Configure Metric Values................................................................................................................... 421

Maximum Values in the Routing Table...................................................................................... 422

Change the IS-IS Metric Style in One Level Only...................................................................... 422

Leaks from One Level to Another.............................................................................................. 423

Sample Configurations.....................................................................................................................424

23 Link Aggregation Control Protocol (LACP)...............................................427

Introduction to Dynamic LAGs and LACP........................................................................................427

Important Points to Remember..................................................................................................427

LACP Modes................................................................................................................................428

Configuring LACP Commands...................................................................................................428

LACP Configuration Tasks................................................................................................................429

Creating a LAG............................................................................................................................ 429

Configuring the LAG Interfaces as Dynamic............................................................................. 430

Setting the LACP Long Timeout.................................................................................................430

Monitoring and Debugging LACP...............................................................................................431

Shared LAG State Tracking............................................................................................................... 431

Configuring Shared LAG State Tracking.................................................................................... 432

Important Points about Shared LAG State Tracking..................................................................433

LACP Basic Configuration Example................................................................................................. 434

Configure a LAG on ALPHA........................................................................................................434

Setting Up a Threshold for Utilization of High-Gigabit Port Channels...........................................441

Guidelines for Monitoring High-Gigabit Port Channels............................................................443

Enabling the Verification of Member Links Utilization in a High-Gigabit Port Channel................444

Viewing Buffer Utilization and Queue Statistics on High-Gigabit Ethernet Backplane Ports....... 444

24 Layer 2..............................................................................................................446

Manage the MAC Address Table......................................................................................................446

Clearing the MAC Address Table............................................................................................... 446

Setting the Aging Time for Dynamic Entries..............................................................................446

Configuring a Static MAC Address............................................................................................. 447

Displaying the MAC Address Table.............................................................................................447

MAC Learning Limit...........................................................................................................................447

Setting the MAC Learning Limit................................................................................................. 448

mac learning-limit Dynamic.......................................................................................................448

mac learning-limit mac-address-sticky.................................................................................... 449

mac learning-limit station-move...............................................................................................449

mac learning-limit no-station-move.........................................................................................449

Learning Limit Violation Actions................................................................................................ 450

Setting Station Move Violation Actions......................................................................................450

Recovering from Learning Limit and Station Move Violations.................................................. 451

NIC Teaming......................................................................................................................................451

Configure Redundant Pairs.............................................................................................................. 452

Important Points about Configuring Redundant Pairs..............................................................454

Far-End Failure Detection................................................................................................................ 455

FEFD State Changes....................................................................................................................456

Configuring FEFD........................................................................................................................ 457

Enabling FEFD on an Interface...................................................................................................458

Debugging FEFD......................................................................................................................... 459

25 Link Layer Discovery Protocol (LLDP)........................................................ 461

802.1AB (LLDP) Overview................................................................................................................. 461

Protocol Data Units.....................................................................................................................461

Optional TLVs....................................................................................................................................462

Management TLVs...................................................................................................................... 462

TIA-1057 (LLDP-MED) Overview......................................................................................................464

TIA Organizationally Specific TLVs.............................................................................................465

Configure LLDP................................................................................................................................ 469

Related Configuration Tasks...................................................................................................... 469

Important Points to Remember................................................................................................. 470

LLDP Compatibility..................................................................................................................... 470

CONFIGURATION versus INTERFACE Configurations....................................................................470

Enabling LLDP....................................................................................................................................471

Disabling and Undoing LLDP...................................................................................................... 471

Enabling LLDP on Management Ports..............................................................................................471

Disabling and Undoing LLDP on Management Ports................................................................ 471

Advertising TLVs................................................................................................................................472

Viewing the LLDP Configuration......................................................................................................473

Viewing Information Advertised by Adjacent LLDP Agents.............................................................474

Configuring LLDPDU Intervals..........................................................................................................475

Configuring Transmit and Receive Mode........................................................................................ 475

Configuring a Time to Live............................................................................................................... 476

Debugging LLDP............................................................................................................................... 477

Relevant Management Objects........................................................................................................478

26 Microsoft Network Load Balancing........................................................... 484

NLB Unicast Mode Scenario............................................................................................................ 484

NLB Multicast Mode Scenario.......................................................................................................... 485

Limitations With Enabling NLB on Switches....................................................................................485

Benefits and Working of Microsoft Clustering................................................................................ 485

Enable and Disable VLAN Flooding .................................................................................................486

Configuring a Switch for NLB ......................................................................................................... 486

.....................................................................................................................................................486

27 Multicast Source Discovery Protocol (MSDP)...........................................487

Protocol Overview............................................................................................................................487

Anycast RP........................................................................................................................................ 489

Implementation Information............................................................................................................489

Configure Multicast Source Discovery Protocol.............................................................................489

Related Configuration Tasks...................................................................................................... 489

Enable MSDP.....................................................................................................................................493

Manage the Source-Active Cache...................................................................................................494

Viewing the Source-Active Cache............................................................................................. 494

Limiting the Source-Active Cache............................................................................................. 495

Clearing the Source-Active Cache.............................................................................................495

Enabling the Rejected Source-Active Cache.............................................................................495

Accept Source-Active Messages that Fail the RFP Check.............................................................. 495

Specifying Source-Active Messages................................................................................................ 499

Limiting the Source-Active Messages from a Peer......................................................................... 500

Preventing MSDP from Caching a Local Source.............................................................................500

Preventing MSDP from Caching a Remote Source.........................................................................501

Preventing MSDP from Advertising a Local Source........................................................................ 502

Logging Changes in Peership States................................................................................................503

Terminating a Peership.....................................................................................................................503

Clearing Peer Statistics..................................................................................................................... 503

Debugging MSDP............................................................................................................................. 504

MSDP with Anycast RP..................................................................................................................... 504

Configuring Anycast RP....................................................................................................................506

Reducing Source-Active Message Flooding..............................................................................506

Specifying the RP Address Used in SA Messages...................................................................... 506

MSDP Sample Configurations..........................................................................................................509

28 Multiple Spanning Tree Protocol (MSTP)...................................................513

Protocol Overview.............................................................................................................................513

Spanning Tree Variations.................................................................................................................. 514

Implementation Information...................................................................................................... 514

Configure Multiple Spanning Tree Protocol.................................................................................... 514

Related Configuration Tasks.......................................................................................................514

Enable Multiple Spanning Tree Globally...........................................................................................515

Adding and Removing Interfaces......................................................................................................515

Creating Multiple Spanning Tree Instances......................................................................................515

Influencing MSTP Root Selection..................................................................................................... 517

Interoperate with Non-Dell Networking OS Bridges.......................................................................517

Changing the Region Name or Revision..........................................................................................518

Modifying Global Parameters........................................................................................................... 518

Modifying the Interface Parameters................................................................................................. 519

Configuring an EdgePort..................................................................................................................520

Flush MAC Addresses after a Topology Change..............................................................................521

MSTP Sample Configurations........................................................................................................... 521

Router 1 Running-ConfigurationRouter 2 Running-ConfigurationRouter 3 Running-

ConfigurationSFTOS Example Running-Configuration............................................................ 522

Debugging and Verifying MSTP Configurations.............................................................................. 525

29 Multicast Features..........................................................................................528

Enabling IP Multicast.........................................................................................................................528

Multicast with ECMP.........................................................................................................................528

Implementation Information............................................................................................................529

First Packet Forwarding for Lossless Multicast................................................................................530

Multicast Policies.............................................................................................................................. 530

IPv4 Multicast Policies................................................................................................................ 530

30 Object Tracking..............................................................................................538

Object Tracking Overview................................................................................................................538

Track Layer 2 Interfaces..............................................................................................................539

Track Layer 3 Interfaces..............................................................................................................539

Track IPv4 and IPv6 Routes........................................................................................................540

Set Tracking Delays..................................................................................................................... 541

VRRP Object Tracking................................................................................................................. 541

Object Tracking Configuration.........................................................................................................541

Tracking a Layer 2 Interface........................................................................................................541

Tracking a Layer 3 Interface....................................................................................................... 543

Track an IPv4/IPv6 Route........................................................................................................... 544

Displaying Tracked Objects..............................................................................................................548

31 Open Shortest Path First (OSPFv2 and OSPFv3).......................................550

Protocol Overview............................................................................................................................550

Autonomous System (AS) Areas................................................................................................. 550

Area Types....................................................................................................................................551

Networks and Neighbors............................................................................................................552

Router Types............................................................................................................................... 552

Designated and Backup Designated Routers............................................................................ 554

Link-State Advertisements (LSAs)............................................................................................... 554

Router Priority and Cost............................................................................................................. 556

OSPF with Dell Networking OS........................................................................................................ 556

Graceful Restart...........................................................................................................................557

Fast Convergence (OSPFv2, IPv4 Only)..................................................................................... 558

Multi-Process OSPFv2 (IPv4 only)..............................................................................................558

RFC-2328 Compliant OSPF Flooding........................................................................................ 559

OSPF ACK Packing......................................................................................................................560

Setting OSPF Adjacency with Cisco Routers.............................................................................560

Configuration Information................................................................................................................561

Configuration Task List for OSPFv2 (OSPF for IPv4).................................................................. 561

Sample Configurations for OSPFv2..................................................................................................576

Basic OSPFv2 Router Topology..................................................................................................576

OSPF Area 0 — Te 1/1 and 1/2.................................................................................................... 576

OSPF Area 0 — Te 3/1 and 3/2....................................................................................................577

OSPF Area 0 — Te 2/1 and 2/2....................................................................................................577

Configuration Task List for OSPFv3 (OSPF for IPv6)........................................................................577

Enabling IPv6 Unicast Routing....................................................................................................578

Assigning IPv6 Addresses on an Interface..................................................................................578

Assigning Area ID on an Interface.............................................................................................. 578

Assigning OSPFv3 Process ID and Router ID Globally...............................................................579

Configuring Stub Areas............................................................................................................... 579

Configuring Passive-Interface.................................................................................................... 579

Redistributing Routes................................................................................................................. 580

Configuring a Default Route...................................................................................................... 580

Enabling OSPFv3 Graceful Restart..............................................................................................581

OSPFv3 Authentication Using IPsec...........................................................................................583

Troubleshooting OSPFv3............................................................................................................590

32 Policy-based Routing (PBR)......................................................................... 592

Overview........................................................................................................................................... 592

Implementing Policy-based Routing with Dell Networking OS.....................................................594

Configuration Task List for Policy-based Routing.......................................................................... 594

PBR Exceptions (Permit)..............................................................................................................597

Sample Configuration...................................................................................................................... 600

Create the Redirect-List GOLDAssign Redirect-List GOLD to Interface 2/11View

Redirect-List GOLD.....................................................................................................................601

33 PIM Sparse-Mode (PIM-SM)......................................................................... 605

Implementation Information............................................................................................................605

Protocol Overview............................................................................................................................605

Requesting Multicast Traffic.......................................................................................................605

Refuse Multicast Traffic.............................................................................................................. 606

Send Multicast Traffic................................................................................................................. 606

Configuring PIM-SM.........................................................................................................................607

Related Configuration Tasks.......................................................................................................607

Enable PIM-SM..................................................................................................................................607

Configuring S,G Expiry Timers.........................................................................................................608

Configuring a Static Rendezvous Point...........................................................................................609

Overriding Bootstrap Router Updates....................................................................................... 609

Configuring a Designated Router.....................................................................................................610

Creating Multicast Boundaries and Domains.................................................................................. 610

Enabling PIM-SM Graceful Restart....................................................................................................611

34 PIM Source-Specific Mode (PIM-SSM)....................................................... 612

Implementation Information............................................................................................................ 612

Important Points to Remember..................................................................................................612

Configure PIM-SMM......................................................................................................................... 613

Related Configuration Tasks.......................................................................................................613

Enabling PIM-SSM.............................................................................................................................613

Use PIM-SSM with IGMP Version 2 Hosts........................................................................................613

Configuring PIM-SSM with IGMPv2............................................................................................614

35 Port Monitoring.............................................................................................. 616

Important Points to Remember........................................................................................................616

Port Monitoring................................................................................................................................. 617

Configuring Port Monitoring............................................................................................................ 618

Enabling Flow-Based Monitoring.................................................................................................... 620

Remote Port Mirroring...................................................................................................................... 621

Remote Port Mirroring Example................................................................................................. 621

Configuring Remote Port Mirroring........................................................................................... 622

Displaying Remote-Port Mirroring Configurations................................................................... 624

Configuring the Sample Remote Port Mirroring....................................................................... 624

Configuring the Encapsulated Remote Port Mirroring................................................................... 628

Changes to Default BehaviorConfiguration steps for ERPM ................................................... 628

ERPM Behavior on a typical Dell Networking OS ...........................................................................630

Decapsulation of ERPM packets at the Destination IP/ Analyzer............................................. 630

36 Private VLANs (PVLAN)..................................................................................632

Private VLAN Concepts.....................................................................................................................632

Using the Private VLAN Commands.................................................................................................633

Configuration Task List.....................................................................................................................634

Creating PVLAN ports.................................................................................................................634

Creating a Primary VLAN............................................................................................................ 635

Creating a Community VLAN..................................................................................................... 636

Creating an Isolated VLAN..........................................................................................................637

Private VLAN Configuration Example.............................................................................................. 638

Inspecting the Private VLAN Configuration.....................................................................................639

37 Per-VLAN Spanning Tree Plus (PVST+)...................................................... 642

Protocol Overview............................................................................................................................642

Implementation Information............................................................................................................643

Configure Per-VLAN Spanning Tree Plus........................................................................................ 643

Related Configuration Tasks...................................................................................................... 643

Enabling PVST+.................................................................................................................................643

Disabling PVST+............................................................................................................................... 644

Influencing PVST+ Root Selection...................................................................................................644

Modifying Global PVST+ Parameters...............................................................................................646

Modifying Interface PVST+ Parameters...........................................................................................647

Configuring an EdgePort..................................................................................................................648

PVST+ in Multi-Vendor Networks....................................................................................................649

Enabling PVST+ Extend System ID.................................................................................................. 649

PVST+ Sample Configurations.........................................................................................................650

38 Quality of Service (QoS)................................................................................652

Implementation Information............................................................................................................654

Port-Based QoS Configurations...................................................................................................... 654

Setting dot1p Priorities for Incoming Traffic..............................................................................655

Honoring dot1p Priorities on Ingress Traffic..............................................................................655

Configuring Port-Based Rate Policing.......................................................................................656

Configuring Port-Based Rate Shaping.......................................................................................656

Policy-Based QoS Configurations....................................................................................................657

Classify Traffic.............................................................................................................................658

Create a QoS Policy.................................................................................................................... 661

Create Policy Maps..................................................................................................................... 663

Enabling QoS Rate Adjustment........................................................................................................669

Enabling Strict-Priority Queueing.................................................................................................... 670

Weighted Random Early Detection..................................................................................................670

Creating WRED Profiles...............................................................................................................671

Applying a WRED Profile to Traffic............................................................................................. 671

Displaying Default and Configured WRED Profiles....................................................................672

Displaying WRED Drop Statistics................................................................................................ 672

Pre-Calculating Available QoS CAM Space..................................................................................... 672

Configuring Weights and ECN for WRED ....................................................................................... 673

Global Service Pools With WRED and ECN Settings................................................................. 674

Configuring WRED and ECN Attributes........................................................................................... 675

Guidelines for Configuring ECN for Classifying and Color-Marking Packets................................676

Sample configuration to mark non-ecn packets as “yellow” with Multiple traffic class.......... 677

Classifying Incoming Packets Using ECN and Color-Marking..................................................677

Sample configuration to mark non-ecn packets as “yellow” with single traffic class.............680

Applying Layer 2 Match Criteria on a Layer 3 Interface...................................................................681

Applying DSCP and VLAN Match Criteria on a Service Queue....................................................... 681

39 Routing Information Protocol (RIP)........................................................... 683

Protocol Overview............................................................................................................................683

RIPv1............................................................................................................................................ 683

RIPv2............................................................................................................................................683

Implementation Information............................................................................................................684

Configuration Information............................................................................................................... 684

Configuration Task List...............................................................................................................684

RIP Configuration Example.........................................................................................................691

40 Remote Monitoring (RMON)........................................................................697

Implementation Information............................................................................................................697

Fault Recovery...................................................................................................................................697

Setting the rmon Alarm.............................................................................................................. 698

Configuring an RMON Event......................................................................................................699

Configuring RMON Collection Statistics................................................................................... 700

Configuring the RMON Collection History................................................................................700

41 Rapid Spanning Tree Protocol (RSTP)........................................................702

Protocol Overview............................................................................................................................702

Configuring Rapid Spanning Tree.................................................................................................... 702

Related Configuration Tasks.......................................................................................................702

Important Points to Remember....................................................................................................... 703

RSTP and VLT.............................................................................................................................. 703

Configuring Interfaces for Layer 2 Mode.........................................................................................703

Enabling Rapid Spanning Tree Protocol Globally........................................................................... 704

Adding and Removing Interfaces.....................................................................................................706

Modifying Global Parameters........................................................................................................... 707

Enabling SNMP Traps for Root Elections and Topology Changes........................................... 708

Modifying Interface Parameters.......................................................................................................708

Enabling SNMP Traps for Root Elections and Topology Changes................................................. 709

Influencing RSTP Root Selection..................................................................................................... 709

Configuring an EdgePort..................................................................................................................709

Configuring Fast Hellos for Link State Detection.............................................................................710

42 Software-Defined Networking (SDN)......................................................... 712

43 Security.............................................................................................................713

AAA Accounting.................................................................................................................................713

Configuration Task List for AAA Accounting.............................................................................. 713

AAA Authentication............................................................................................................................715

Configuration Task List for AAA Authentication.........................................................................716

Obscuring Passwords and Keys........................................................................................................718

AAA Authorization............................................................................................................................. 719

Privilege Levels Overview............................................................................................................719

Configuration Task List for Privilege Levels................................................................................719

RADIUS.............................................................................................................................................. 725

RADIUS Authentication............................................................................................................... 725

Configuration Task List for RADIUS............................................................................................726

TACACS+...........................................................................................................................................729

Configuration Task List for TACACS+........................................................................................ 729

TACACS+ Remote Authentication..............................................................................................731

Command Authorization............................................................................................................ 732

Protection from TCP Tiny and Overlapping Fragment Attacks.......................................................732

Enabling SCP and SSH...................................................................................................................... 732

Using SCP with SSH to Copy a Software Image........................................................................ 733

Removing the RSA Host Keys and Zeroizing Storage ...............................................................733

Configuring When to Re-generate an SSH Key ........................................................................734

Configuring the SSH Server Key Exchange Algorithm...............................................................734

Configuring the HMAC Algorithm for the SSH Server............................................................... 735

Configuring the SSH Server Cipher List......................................................................................735

Secure Shell Authentication........................................................................................................736

Troubleshooting SSH.................................................................................................................. 739

Telnet.................................................................................................................................................739

VTY Line and Access-Class Configuration.......................................................................................739

VTY Line Local Authentication and Authorization.....................................................................740

VTY Line Remote Authentication and Authorization.................................................................740

VTY MAC-SA Filter Support.........................................................................................................741

Role-Based Access Control.............................................................................................................. 741

Overview of RBAC.......................................................................................................................742

User Roles....................................................................................................................................744

AAA Authentication and Authorization for Roles.......................................................................748

Role Accounting.......................................................................................................................... 751

Display Information About User Roles....................................................................................... 752

44 Service Provider Bridging.............................................................................754

VLAN Stacking...................................................................................................................................754

Important Points to Remember..................................................................................................755

Configure VLAN Stacking............................................................................................................756

Creating Access and Trunk Ports............................................................................................... 756

Enable VLAN-Stacking for a VLAN..............................................................................................757

Configuring the Protocol Type Value for the Outer VLAN Tag.................................................757

Configuring Dell Networking OS Options for Trunk Ports........................................................757

Debugging VLAN Stacking..........................................................................................................758

VLAN Stacking in Multi-Vendor Networks................................................................................. 759

VLAN Stacking Packet Drop Precedence.........................................................................................762

Enabling Drop Eligibility.............................................................................................................. 762

Honoring the Incoming DEI Value............................................................................................. 763

Marking Egress Packets with a DEI Value...................................................................................764

Dynamic Mode CoS for VLAN Stacking........................................................................................... 764

Mapping C-Tag to S-Tag dot1p Values......................................................................................766

Layer 2 Protocol Tunneling.............................................................................................................. 766

Implementation Information...................................................................................................... 768

Enabling Layer 2 Protocol Tunneling.........................................................................................769

Specifying a Destination MAC Address for BPDUs.................................................................... 769

Setting Rate-Limit BPDUs...........................................................................................................769

Debugging Layer 2 Protocol Tunneling..................................................................................... 770

Provider Backbone Bridging.............................................................................................................770

45 sFlow................................................................................................................. 771

Overview............................................................................................................................................ 771

Implementation Information.............................................................................................................771

Important Points to Remember..................................................................................................772

Enabling Extended sFlow..................................................................................................................772

Enabling and Disabling sFlow on an Interface.................................................................................773

Enabling sFlow Max-Header Size Extended.....................................................................................773

sFlow Show Commands................................................................................................................... 774

Displaying Show sFlow Global....................................................................................................774

Displaying Show sFlow on an Interface......................................................................................775

Displaying Show sFlow on a Stack-unit..................................................................................... 776

Configuring Specify Collectors.........................................................................................................776

Changing the Polling Intervals..........................................................................................................776

Back-Off Mechanism........................................................................................................................ 777

sFlow on LAG ports........................................................................................................................... 777

Enabling Extended sFlow.................................................................................................................. 777

Important Points to Remember..................................................................................................778

46 Simple Network Management Protocol (SNMP)..................................... 780

Protocol Overview............................................................................................................................780

Implementation Information............................................................................................................780

SNMPv3 Compliance With FIPS....................................................................................................... 780

Configuration Task List for SNMP.................................................................................................... 782

Related Configuration Tasks.......................................................................................................782

Important Points to Remember....................................................................................................... 782

Set up SNMP......................................................................................................................................782

Creating a Community............................................................................................................... 783

Setting Up User-Based Security (SNMPv3).................................................................................783

Reading Managed Object Values..................................................................................................... 784

Writing Managed Object Values.......................................................................................................785

Configuring Contact and Location Information using SNMP.........................................................786

Subscribing to Managed Object Value Updates using SNMP......................................................... 787

Enabling a Subset of SNMP Traps.................................................................................................... 788

Copy Configuration Files Using SNMP............................................................................................ 790

Copying a Configuration File......................................................................................................792

Copying Configuration Files via SNMP.......................................................................................792

Copying the Startup-Config Files to the Running-Config........................................................ 793

Copying the Startup-Config Files to the Server via FTP............................................................793

Copying the Startup-Config Files to the Server via TFTP..........................................................794

Copy a Binary File to the Startup-Configuration.......................................................................794

Additional MIB Objects to View Copy Statistics.........................................................................795

Obtaining a Value for MIB Objects.............................................................................................795

MIB Support to Display the Available Memory Size on Flash..........................................................796

Viewing the Available Flash Memory Size.................................................................................. 796

MIB Support to Display the Software Core Files Generated by the System................................... 797

Viewing the Software Core Files Generated by the System......................................................797

Manage VLANs using SNMP............................................................................................................. 798

Creating a VLAN..........................................................................................................................798

Assigning a VLAN Alias................................................................................................................798

Displaying the Ports in a VLAN................................................................................................... 799

Add Tagged and Untagged Ports to a VLAN..............................................................................799

Managing Overload on Startup........................................................................................................800

Enabling and Disabling a Port using SNMP..................................................................................... 800

Fetch Dynamic MAC Entries using SNMP........................................................................................ 801

Deriving Interface Indices................................................................................................................ 802

Monitor Port-Channels.................................................................................................................... 803

Troubleshooting SNMP Operation.................................................................................................. 804

47 Storm Control.................................................................................................806

Configure Storm Control................................................................................................................. 806

Configuring Storm Control from INTERFACE Mode.................................................................806

Configuring Storm Control from CONFIGURATION Mode......................................................806

48 Spanning Tree Protocol (STP)..................................................................... 807

Protocol Overview............................................................................................................................807

Configure Spanning Tree................................................................................................................. 807

Related Configuration Tasks...................................................................................................... 807

Important Points to Remember.......................................................................................................808

Configuring Interfaces for Layer 2 Mode........................................................................................ 808

Enabling Spanning Tree Protocol Globally..................................................................................... 809

Adding an Interface to the Spanning Tree Group............................................................................811

Modifying Global Parameters........................................................................................................... 812

Modifying Interface STP Parameters................................................................................................ 813

Enabling PortFast...............................................................................................................................813

Prevent Network Disruptions with BPDU Guard........................................................................814

Selecting STP Root............................................................................................................................816

STP Root Guard.................................................................................................................................817

Root Guard Scenario...................................................................................................................817

Configuring Root Guard............................................................................................................. 818

Enabling SNMP Traps for Root Elections and Topology Changes................................................. 819

Configuring Spanning Trees as Hitless.............................................................................................819

STP Loop Guard................................................................................................................................820

Configuring Loop Guard.............................................................................................................821

Displaying STP Guard Configuration............................................................................................... 822

49 System Time and Date.................................................................................. 823

Network Time Protocol....................................................................................................................823

Protocol Overview......................................................................................................................824

Configure the Network Time Protocol...................................................................................... 825

Enabling NTP...............................................................................................................................825

Configuring NTP Broadcasts...................................................................................................... 825

Disabling NTP on an Interface....................................................................................................826

Configuring a Source IP Address for NTP Packets....................................................................826

Configuring NTP Authentication................................................................................................826

Dell Networking OS Time and Date.................................................................................................830

Configuration Task List ..............................................................................................................830

Setting the Time and Date for the Switch Software Clock....................................................... 830

Setting the Timezone................................................................................................................. 830

Set Daylight Saving Time.............................................................................................................831

Setting Daylight Saving Time Once............................................................................................ 831

Setting Recurring Daylight Saving Time.....................................................................................832

50 Tunneling ....................................................................................................... 834

Configuring a Tunnel........................................................................................................................834

Configuring Tunnel Keepalive Settings............................................................................................835

Configuring a Tunnel Interface........................................................................................................836

Configuring Tunnel allow-remote Decapsulation..........................................................................836

Configuring Tunnel source anylocal Decapsulation.......................................................................837

Guidelines for Configuring Multipoint Receive-Only Tunnels........................................................837

Multipoint Receive-Only Type and IP Unnumbered Interfaces for Tunnels..................................838

51 Upgrade Procedures......................................................................................839

Get Help with Upgrades................................................................................................................... 839

52 Virtual LANs (VLANs)..................................................................................... 840

Default VLAN.................................................................................................................................... 840

Port-Based VLANs.............................................................................................................................841

VLANs and Port Tagging...................................................................................................................842

Configuration Task List.....................................................................................................................842

Creating a Port-Based VLAN...................................................................................................... 842

Assigning Interfaces to a VLAN.................................................................................................. 843

Moving Untagged Interfaces...................................................................................................... 845

Assigning an IP Address to a VLAN............................................................................................ 846

Configuring Native VLANs................................................................................................................846

Enabling Null VLAN as the Default VLAN.........................................................................................847

53 Virtual Link Trunking (VLT).......................................................................... 848

Overview...........................................................................................................................................848

VLT on Core Switches................................................................................................................ 849

Enhanced VLT.............................................................................................................................849

VLT Terminology.............................................................................................................................. 850

Configure Virtual Link Trunking........................................................................................................851

Important Points to Remember..................................................................................................851

Configuration Notes................................................................................................................... 852

Primary and Secondary VLT Peers............................................................................................. 856

RSTP and VLT..............................................................................................................................856

VLT Bandwidth Monitoring.........................................................................................................856

VLT and IGMP Snooping.............................................................................................................857

VLT IPv6.......................................................................................................................................857

VLT Port Delayed Restoration.....................................................................................................857

PIM-Sparse Mode Support on VLT.............................................................................................857

VLT Routing ................................................................................................................................859

Non-VLT ARP Sync......................................................................................................................861

RSTP Configuration...........................................................................................................................861

Preventing Forwarding Loops in a VLT Domain........................................................................862

Sample RSTP Configuration....................................................................................................... 862

Configuring VLT..........................................................................................................................863

PVST+ Configuration........................................................................................................................874

Sample PVST+ Configuration.....................................................................................................874

eVLT Configuration Example............................................................................................................875

eVLT Configuration Step Examples............................................................................................876

PIM-Sparse Mode Configuration Example...................................................................................... 878

Verifying a VLT Configuration.......................................................................................................... 879

Additional VLT Sample Configurations............................................................................................882

Configuring Virtual Link Trunking (VLT Peer 1)Configuring Virtual Link Trunking (VLT Peer

2)Verifying a Port-Channel Connection to a VLT Domain (From an Attached Access

Switch).........................................................................................................................................883

Troubleshooting VLT........................................................................................................................885

Reconfiguring Stacked Switches as VLT..........................................................................................886

Specifying VLT Nodes in a PVLAN....................................................................................................887

Association of VLTi as a Member of a PVLAN........................................................................... 888

MAC Synchronization for VLT Nodes in a PVLAN.....................................................................888

PVLAN Operations When One VLT Peer is Down.....................................................................888

PVLAN Operations When a VLT Peer is Restarted.....................................................................889

Interoperation of VLT Nodes in a PVLAN with ARP Requests...................................................889

Scenarios for VLAN Membership and MAC Synchronization With VLT Nodes in PVLAN....... 889

Configuring a VLT VLAN or LAG in a PVLAN....................................................................................891

Creating a VLT LAG or a VLT VLAN............................................................................................ 891

Associating the VLT LAG or VLT VLAN in a PVLAN....................................................................892

Proxy ARP Capability on VLT Peer Nodes........................................................................................893

Working of Proxy ARP for VLT Peer Nodes............................................................................... 894

VLT Nodes as Rendezvous Points for Multicast Resiliency.............................................................895

Configuring VLAN-Stack over VLT...................................................................................................895

54 VLT Proxy Gateway....................................................................................... 900

Proxy Gateway in VLT Domains.......................................................................................................900

Guidelines for Enabling the VLT Proxy Gateway....................................................................... 901

Enabling the VLT Proxy Gateway............................................................................................... 902

LLDP Organizational TLV for Proxy Gateway............................................................................ 903

Sample Configurations for LLDP VLT Proxy Gateway...............................................................903

Sample Configurations for Static VLT Proxy Gateway..............................................................904

Sample Scenario for VLT Proxy Gateway.................................................................................. 904

Configuring an LLDP VLT Proxy Gateway....................................................................................... 905

55 Virtual Router Redundancy Protocol (VRRP)............................................907

VRRP Overview................................................................................................................................. 907

VRRP Benefits................................................................................................................................... 908

VRRP Implementation...................................................................................................................... 908

VRRP Configuration..........................................................................................................................909

Configuration Task List...............................................................................................................909

Setting VRRP Initialization Delay.................................................................................................919

Sample Configurations..................................................................................................................... 919

VRRP for an IPv4 Configuration..................................................................................................919

VRRP in a VRF Configuration......................................................................................................924

VRRP for IPv6 Configuration...................................................................................................... 930

56 Z-Series Debugging and Diagnostics.........................................................935

Offline Diagnostics............................................................................................................................935

Important Points to Remember................................................................................................. 935

Running Offline Diagnostics.......................................................................................................935

TRACE Logs.......................................................................................................................................939

Auto Save on Crash or Rollover................................................................................................. 940

Last Restart Reason.......................................................................................................................... 940

Line Card Restart Causes and Reasons..................................................................................... 940

Hardware Watchdog Timer..............................................................................................................940

show hardware Commands.............................................................................................................940

Environmental Monitoring............................................................................................................... 943

.....................................................................................................................................................943

Recognize an Over-Temperature Condition.............................................................................943

Troubleshoot an Over-Temperature Condition....................................................................... 944

Recognize an Under-Voltage Condition...................................................................................944

Troubleshoot an Under-Voltage Condition.............................................................................. 944

Buffer Tuning.................................................................................................................................... 945

Buffer Tuning Points...................................................................................................................946

Decide to Tune Buffers...............................................................................................................947

Using the Buffer Tuning Commands......................................................................................... 947

Sample Buffer Profile Configuration..........................................................................................949

Troubleshooting Packet Loss...........................................................................................................950

Displaying Drop Counters.......................................................................................................... 950

Displaying Dataplane Statistics................................................................................................... 951

Displaying Stack Member Counters...........................................................................................952

Enabling Application Core Dumps...................................................................................................952

Mini Core Dumps..............................................................................................................................953

Enabling TCP Dumps........................................................................................................................953

57 Standards Compliance.................................................................................. 955

IEEE Compliance...............................................................................................................................955

RFC and I-D Compliance................................................................................................................. 956

General Internet Protocols.........................................................................................................956

General IPv4 Protocols............................................................................................................... 957

General IPv6 Protocols...............................................................................................................958

Border Gateway Protocol (BGP).................................................................................................958

Open Shortest Path First (OSPF).................................................................................................959

Intermediate System to Intermediate System (IS-IS)................................................................ 960

Routing Information Protocol (RIP)........................................................................................... 960

Multicast...................................................................................................................................... 961

Network Management................................................................................................................ 961

MIB Location.....................................................................................................................................968