Dell PowerConnect B-TI24X Quick Reference Guide

53-1002269-02 26 April 2011

PowerConnect B-Series TI24X

Configuration Guide

Reproduction of these materials in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.

Trademarks used in this text: Dell, the DELL logo, Dell OpenManage and PowerConnect are trademarks of Dell Inc.; Microsoft, Windows and Windows Server are either trademarks or registered trademarks of Microsoft Corporation in the United States and/ or other countries.

Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Inc. disclaims any proprietary interest in trademarks and trade names other than its own.

Regulatory Model Code: TurboIron 24X

Document History

Title Publication number Summary of changes Date

PowerConnect B-Series TI24X Configuration Guide

53-1002269-01 New document March 2011

53-1002269-02 Removed deprecated

April 2011 commands, web management and DVMRP references.

About This Document

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxi

Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxi

Document conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxi

Text formatting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxi

Command syntax conventions . . . . . . . . . . . . . . . . . . . . . . . . .xxxii

Notes, cautions, and danger notices . . . . . . . . . . . . . . . . . . . .xxxii

Notice to the reader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxxii

Related publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xxxii

Getting technical help or reporting errors . . . . . . . . . . . . . . . . . . . xxxiii

Contacting Dell. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxxiii

Chapter 1 Getting Familiar with Management Applications

Using the management port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

How the management port works. . . . . . . . . . . . . . . . . . . . . . . . . 1

CLI Commands for use with the management port. . . . . . . . . . . 1

Logging on through the CLI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

On-line help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Command completion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Scroll control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Line editing commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Using and port number with CLI commands. . . . . . . . . . . . . . . . . . . . 5

CLI nomenclature on PowerConnectdevices . . . . . . . . . . . . . . . . 5

Searching and filtering output from CLI commands . . . . . . . . . . 5

Using special characters in regular expressions . . . . . . . . . . . . . 7

Creating an alias for a CLI command . . . . . . . . . . . . . . . . . . . . . . 9

Logging on through Brocade Network Advisor . . . . . . . . . . . . . . . . .10

Chapter 2 Configuring Basic Software Features

Configuring basic system parameters . . . . . . . . . . . . . . . . . . . . . . . .11

Entering system administration information . . . . . . . . . . . . . . .12

Configuring Simple Network Management Protocol (SNMP)

parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Disabling Syslog messages and traps for CLI access . . . . . . . . 16

Configuring an interface as the source for all Telnet packets . 17

Cancelling an outbound Telnet session . . . . . . . . . . . . . . . . . . .18

Specifying a Simple Network Time Protocol (SNTP) server. . . . 18

Setting the system clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Limiting broadcast, multicast, and unknown unicast traffic. . . 21

PowerConnect B-Series TI24X Configuration Guide iii 53-1002269-02

Configuring basic port parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Assigning a port name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Modifying port speed and duplex mode. . . . . . . . . . . . . . . . . . .25

Auto speed detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Modifying port duplex mode . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Disabling or re-enabling a port . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Disabling or re-enabling flow control . . . . . . . . . . . . . . . . . . . . .27

Auto-negotiation and advertisement of flow control . . . . . . . . .28

Configuring the Interpacket Gap (IPG) . . . . . . . . . . . . . . . . . . . . 29

Changing the Gbps fiber negotiation mode . . . . . . . . . . . . . . . .30

Modifying port priority (QoS) . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Configuring port flap dampening . . . . . . . . . . . . . . . . . . . . . . . .30

Port loop detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Chapter 3 Operations, Administration, and Maintenance

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Determining the software versions installed and

running on a device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Determining the flash image version running on the device . . 39 Determining the image versions installed in flash memory . . . 40

Flash image verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Image file types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Upgrading software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Upgrading the boot code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Upgrading the flash code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Boot code synchronization feature. . . . . . . . . . . . . . . . . . . . . . . 43

Using SNMP to upgrade software . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Changing the block size for TFTP file transfers . . . . . . . . . . . . . . . . . 44

Rebooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Displaying the boot preference . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Loading and saving configuration files . . . . . . . . . . . . . . . . . . . . . . .45

Replacing the startup configuration with the

running configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Replacing the running configuration with the

startup configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Logging changes to the startup-config file. . . . . . . . . . . . . . . . .46

Copying a configuration file to or from a TFTP server . . . . . . . . 47

Dynamic configuration loading . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Maximum file sizes for startup-config file and running-config . 50

Scheduling a system reload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Reloading at a specific time . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Reloading after a specific amount of time. . . . . . . . . . . . . . . . . 51

Displaying the amount of time remaining

before a scheduled reload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Canceling a scheduled reload. . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Diagnostic error codes and remedies for TFTP transfers. . . . . . . . . 51

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Chapter 4 Monitoring Hardware Components

Hardware support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Digital optical monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Supported media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Media not supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Supported media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Media not supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Configuration limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Enabling digital optical monitoring . . . . . . . . . . . . . . . . . . . . . . .54

Setting the alarm interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Displaying information about installed media . . . . . . . . . . . . . .55

Viewing optical monitoring information . . . . . . . . . . . . . . . . . . .56

Syslog messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Chapter 5 Configuring IPv6 Connectivity

IPv6 addressing overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

IPv6 address types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

IPv6 stateless autoconfiguration . . . . . . . . . . . . . . . . . . . . . . . .62

IPv6 CLI command support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Configuring an IPv6 host address on a Layer 2 switch. . . . . . . . . . .63

Configuring a global or site-local IPv6 address with a

manually configured interface ID . . . . . . . . . . . . . . . . . . . . . . . .64

Configuring a link-local IPv6 address as a

system-wide address for a switch. . . . . . . . . . . . . . . . . . . . . . . .64

Configuring the management port for an IPv6 automatic address

configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Configuring basic IPv6 connectivity on a Layer 3 switch . . . . . . . . . 65

Configuring IPv6 on each router interface . . . . . . . . . . . . . . . . .65

IPv6 management (IPv6 host support) . . . . . . . . . . . . . . . . . . . . . . .68

Restricting SNMP access to an IPv6 node. . . . . . . . . . . . . . . . .68

Specifying an IPv6 SNMP trap receiver . . . . . . . . . . . . . . . . . . .68

SNMP V3 over IPv6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

SNTP over IPv6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

Secure Shell, SCP, and IPv6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

IPv6 Telnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

Configuring name-to-IPv6 address resolution using IPv6 DNS

resolver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Defining an IPv6 DNS entry. . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Using the IPv6 copy command . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Using the IPv6 ncopy command . . . . . . . . . . . . . . . . . . . . . . . . .73

IPv6 ping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Configuring an IPv6 Syslog server . . . . . . . . . . . . . . . . . . . . . . . 76

Viewing IPv6 SNMP server addresses . . . . . . . . . . . . . . . . . . . . 76

Disabling router advertisement and solicitation messages . . . 77

IPv6 debug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Disabling IPv6 on a Layer 2 switch. . . . . . . . . . . . . . . . . . . . . . . 77

PowerConnect B-Series TI24X Configuration Guide v 53-1002269-02

Configuring IPv6 neighbor discovery . . . . . . . . . . . . . . . . . . . . . . . . .77

Configuration notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Neighbor solicitation and advertisement messages . . . . . . . . .78

Configuring static neighbor entries . . . . . . . . . . . . . . . . . . . . . . . . . .79

Clearing global IPv6 information . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Clearing the IPv6 cache. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Clearing IPv6 neighbor information . . . . . . . . . . . . . . . . . . . . . .80

Clearing IPv6 traffic statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Displaying global IPv6 information. . . . . . . . . . . . . . . . . . . . . . . . . . .81

Displaying IPv6 cache information . . . . . . . . . . . . . . . . . . . . . . .81

Displaying IPv6 interface information. . . . . . . . . . . . . . . . . . . . .82

Displaying IPv6 neighbor information. . . . . . . . . . . . . . . . . . . . . 84

Displaying IPv6 TCP information . . . . . . . . . . . . . . . . . . . . . . . . . 85

Displaying IPv6 traffic statistics . . . . . . . . . . . . . . . . . . . . . . . . . 88

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

Chapter 6 Configuring Spanning Tree Protocol (STP) Related Features

STP overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

Configuring standard STP parameters. . . . . . . . . . . . . . . . . . . . . . . .93

STP parameters and defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Enabling or disabling the Spanning Tree Protocol (STP) . . . . . .95

Changing STP bridge and port parameters . . . . . . . . . . . . . . . .96

STP protection enhancement . . . . . . . . . . . . . . . . . . . . . . . . . . .98

Displaying STP information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Configuring STP related features . . . . . . . . . . . . . . . . . . . . . . . . . . .106

802.1W Rapid Spanning Tree (RSTP) . . . . . . . . . . . . . . . . . . . .107

802.1W Draft 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144

Single Spanning Tree (SSTP) . . . . . . . . . . . . . . . . . . . . . . . . . . .148

PVST/PVST+ compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150

Overview of PVST and PVST+ . . . . . . . . . . . . . . . . . . . . . . . . . .151

VLAN tags and dual mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . .152

Configuring PVST+ support . . . . . . . . . . . . . . . . . . . . . . . . . . . .153

Displaying PVST+ support information. . . . . . . . . . . . . . . . . . .153

Configuration examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .154

PVRST compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157

BPDU guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157

Enabling BPDU protection by port. . . . . . . . . . . . . . . . . . . . . . .157

Re-enabling ports disabled by BPDU guard . . . . . . . . . . . . . . .158

Displaying the BPDU guard status . . . . . . . . . . . . . . . . . . . . . .158

Example console messages . . . . . . . . . . . . . . . . . . . . . . . . . . .159

Root guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .159

Enabling STP root guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160

Displaying the STP root guard . . . . . . . . . . . . . . . . . . . . . . . . . .160

Displaying the root guard by VLAN . . . . . . . . . . . . . . . . . . . . . .160

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802.1s Multiple Spanning Tree Protocol . . . . . . . . . . . . . . . . . . . . .161

Multiple spanning-tree regions . . . . . . . . . . . . . . . . . . . . . . . . . 161

Configuration notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .163

Configuring MSTP mode and scope . . . . . . . . . . . . . . . . . . . . .163

Configuring additional MSTP parameters . . . . . . . . . . . . . . . .164

Chapter 7 Configuring Basic Layer 2 Features

Enabling or disabling the Spanning Tree Protocol (STP). . . . . . . . .175

Modifying STP bridge and port parameters . . . . . . . . . . . . . . .175

Changing the MAC age time and disabling MAC address learning 176

Disabling the automatic learning of MAC addresses . . . . . . . 176

Displaying the MAC address table . . . . . . . . . . . . . . . . . . . . . .177

Configuring static MAC entries. . . . . . . . . . . . . . . . . . . . . . . . . . . . .177

Multi-port static MAC address. . . . . . . . . . . . . . . . . . . . . . . . . .178

Configuring VLAN-based static MAC entries . . . . . . . . . . . . . . . . . .179

Clearing MAC address entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . .179

Enabling port-based VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .180

Assigning IEEE 802.1Q tagging to a port . . . . . . . . . . . . . . . . .180

Defining MAC address filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .181

Configuration notes and limitations . . . . . . . . . . . . . . . . . . . . .181

Command syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .181

Enabling logging of management traffic

permitted by MAC filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .183

Displaying and modifying system parameter default settings . . . .184

Configuration considerations . . . . . . . . . . . . . . . . . . . . . . . . . .184

Displaying system parameter default values . . . . . . . . . . . . . .184

Modifying system parameter default values . . . . . . . . . . . . . .186

Egress buffer thresholds for QoS priorities . . . . . . . . . . . . . . . . . . .187

Cut-Through Switching Support on PowerConnect B-Series TI24X

Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .188

Default settings for egress buffer thresholds . . . . . . . . . . . . .188

Disabling and re-enabling the default settings

for egress buffer thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . .189

Setting the egress buffer threshold for all QoS

priorities on a port or group of ports . . . . . . . . . . . . . . . . . . . .189

Setting the egress buffer threshold for a specific

QoS priority on a port or group of ports . . . . . . . . . . . . . . . . . .190

Link Fault Signaling (LFS) for 10G . . . . . . . . . . . . . . . . . . . . . . . . . .190

Jumbo frame support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .191

PowerConnect B-Series TI24X Configuration Guide vii 53-1002269-02

Chapter 8 Configuring Metro Features

Topology groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .193

Master VLAN and member VLANs . . . . . . . . . . . . . . . . . . . . . .193

Control ports and free ports . . . . . . . . . . . . . . . . . . . . . . . . . . .194

Configuration considerations . . . . . . . . . . . . . . . . . . . . . . . . . .194

Configuring a topology group . . . . . . . . . . . . . . . . . . . . . . . . . .194

Displaying topology group information . . . . . . . . . . . . . . . . . . .195

Metro Ring Protocol (MRP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .197

Configuration notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .199

MRP rings without shared interfaces (MRP Phase 1) . . . . . . .199

MRP rings with shared interfaces (MRP Phase 2). . . . . . . . . .200

Ring initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .202

How ring breaks are detected and healed . . . . . . . . . . . . . . . .205

Alarm RHP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208

Master VLANs and customer VLANs. . . . . . . . . . . . . . . . . . . . .209

Configuring MRP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .211

Using MRP diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213

Displaying MRP information . . . . . . . . . . . . . . . . . . . . . . . . . . .214

MRP CLI example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .216

Virtual Switch Redundancy Protocol (VSRP) . . . . . . . . . . . . . . . . . .218

Configuration notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220

Layer 2 and Layer 3 redundancy . . . . . . . . . . . . . . . . . . . . . . .220

Master election and failover . . . . . . . . . . . . . . . . . . . . . . . . . . .220

VSRP-Aware security features. . . . . . . . . . . . . . . . . . . . . . . . . .225

VSRP parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .225

Configuring basic VSRP parameters. . . . . . . . . . . . . . . . . . . . .228

Configuring optional VSRP parameters . . . . . . . . . . . . . . . . . .229

Displaying VSRP information. . . . . . . . . . . . . . . . . . . . . . . . . . .238

VSRP fast start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .241

VSRP and MRP signaling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .242

Chapter 9 Configuring Uni-Directional Link Detection (UDLD) and Protected

Link Groups

UDLD overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .245

Configuration considerations . . . . . . . . . . . . . . . . . . . . . . . . . .246

Enabling UDLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .246

Changing the Keepalive interval . . . . . . . . . . . . . . . . . . . . . . . .246

Changing the Keepalive retries . . . . . . . . . . . . . . . . . . . . . . . . .247

UDLD for tagged ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .247

Displaying UDLD information . . . . . . . . . . . . . . . . . . . . . . . . . . 247

Clearing UDLD statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .249

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Chapter 10 Configuring Virtual LANs (VLANs)

VLAN overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .251

Types of VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .251

Default VLAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .255

802.1Q tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256

Spanning Tree Protocol (STP) . . . . . . . . . . . . . . . . . . . . . . . . . .258

Virtual routing interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .259

VLAN and virtual routing interface groups . . . . . . . . . . . . . . . .260

Dynamic, static, and excluded port membership . . . . . . . . . .261

Super aggregated VLANs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .263

Trunk group ports and VLAN membership . . . . . . . . . . . . . . . .263

Routing between VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .263

Virtual routing interfaces (Layer 3 Switches only) . . . . . . . . . .263

Routing between VLANs using virtual routing

interfaces (Layer 3 Switches only) . . . . . . . . . . . . . . . . . . . . . .264

Dynamic port assignment (Layer 2 Switches

and Layer 3 Switches) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .265

Assigning a different VLAN ID to the default VLAN . . . . . . . . .265

Assigning different VLAN IDs to reserved VLANs 4091 and 4092265

Assigning trunk group ports . . . . . . . . . . . . . . . . . . . . . . . . . . .266

Configuring port-based VLANs . . . . . . . . . . . . . . . . . . . . . . . . .267

Modifying a port-based VLAN . . . . . . . . . . . . . . . . . . . . . . . . . .270

Enable spanning tree on a VLAN . . . . . . . . . . . . . . . . . . . . . . .271

Configuring IP subnet, IPX network andprotocol-based VLANs . . .272

Configuration example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .272

Configuring an IPv6 protocol VLAN . . . . . . . . . . . . . . . . . . . . . . . . . 274

Routing between VLANs using virtual routing

interfaces (Layer 3 Switches only) . . . . . . . . . . . . . . . . . . . . . . . . . .275

Configuring uplink ports within a port-based VLAN . . . . . . . . . . . .281

Configuration considerations . . . . . . . . . . . . . . . . . . . . . . . . . .281

Configuration syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .281

Configuring the same IP subnet address on multiple

port-based VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .282

Configuring VLAN groups and virtual routing interface groups . . .285

Configuring a VLAN group . . . . . . . . . . . . . . . . . . . . . . . . . . . . .285

Configuring a virtual routing interface group . . . . . . . . . . . . . .287

Displaying the VLAN group and virtual routing

interface group information . . . . . . . . . . . . . . . . . . . . . . . . . . .288

Allocating memory for more VLANs or virtual routing interfaces288

Configuring super aggregated VLANs . . . . . . . . . . . . . . . . . . . . . . .289

Configuration note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .292

Configuring aggregated VLANs . . . . . . . . . . . . . . . . . . . . . . . . .292

Verifying the configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . .293

Complete CLI examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .293

Configuring 802.1Q-in-Q tagging . . . . . . . . . . . . . . . . . . . . . . . . . . .296

Configuration rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .297

Enabling 802.1Q-in-Q tagging. . . . . . . . . . . . . . . . . . . . . . . . . .297

Example configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .298

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Configuring private VLANs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300

Configuration notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301

Configuration notes and limitations for PowerConnect

devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .302

Command syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .302

CLI example for Figure 71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .304

Enabling broadcast, unregistered multicast or unknown unicast traffic to the private VLAN on

PowerConnect device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .304

Dual-mode VLAN ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .305

Displaying VLAN information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .307

Displaying VLANs in alphanumeric order . . . . . . . . . . . . . . . . .307

Displaying system-wide VLAN information . . . . . . . . . . . . . . . .308

Displaying VLAN information for specific ports . . . . . . . . . . . .309

Chapter 11 Configuring Trunk Groups and Dynamic Link Aggregation

Trunk group overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311

Trunk group connectivity to a server. . . . . . . . . . . . . . . . . . . . .312

Trunk group rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .312

Trunk group configuration examples . . . . . . . . . . . . . . . . . . . .313

Flexible trunk group membership. . . . . . . . . . . . . . . . . . . . . . .314

Trunk group load sharing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314

Configuring a trunk group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316

CLI syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316

Example 1: Configuring the trunk groups shown in Figure 75 317 Example 2: Configuring a trunk group that spans

two Gbps Ethernet modules in a chassis device. . . . . . . . . . . 317

Example 3: Configuring a multi-slot trunk group

with one port per module . . . . . . . . . . . . . . . . . . . . . . . . . . . . .318

Example 4: Configuring a trunk group of 10 Gbps

Ethernet ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .318

Additional trunking options . . . . . . . . . . . . . . . . . . . . . . . . . . . .318

Displaying trunk group configuration information . . . . . . . . . . . . .323

Dynamic link aggregation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .324

Examples of valid LACP trunk groups . . . . . . . . . . . . . . . . . . . .325

Configuration notes and limitations . . . . . . . . . . . . . . . . . . . . .325

Adaptation to trunk disappearance . . . . . . . . . . . . . . . . . . . . .327

Flexible trunk eligibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .327

Enabling dynamic link aggregation. . . . . . . . . . . . . . . . . . . . . .328

How changing the VLAN membership of a port affects

trunk groups and dynamic keys . . . . . . . . . . . . . . . . . . . . . . . .330

Link aggregation parameters . . . . . . . . . . . . . . . . . . . . . . . . . .330

Displaying and determining the status of aggregate links . . . . . . .335

Events that affect the status of ports in an aggregate link. . .335

Displaying link aggregation and port status information . . . .336

Displaying LACP status information . . . . . . . . . . . . . . . . . . . . .338

Clearing the negotiated aggregate links table . . . . . . . . . . . . . . . .338

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Configuring single link LACP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .338

Configuration notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .339

CLI syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .339

Chapter 12 Configuring GARP VLAN Registration Protocol

GVRP overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .341

Application examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .341

Dynamic core and fixed edge . . . . . . . . . . . . . . . . . . . . . . . . . .342

Dynamic core and dynamic edge . . . . . . . . . . . . . . . . . . . . . . .343

Fixed core and dynamic edge . . . . . . . . . . . . . . . . . . . . . . . . . .343

Fixed core and fixed edge . . . . . . . . . . . . . . . . . . . . . . . . . . . . .343

VLAN names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .344

Configuration notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .344

Configuring GVRP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .345

Changing the GVRP base VLAN ID . . . . . . . . . . . . . . . . . . . . . .345

Increasing the maximum configurable value of the

Leaveall timer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346

Enabling GVRP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346

Disabling VLAN advertising . . . . . . . . . . . . . . . . . . . . . . . . . . . .347

Disabling VLAN learning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .347

Changing the GVRP timers . . . . . . . . . . . . . . . . . . . . . . . . . . . .347

Converting a VLAN created by GVRP into a statically-configured

VLAN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .349

Displaying GVRP information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .349

Displaying GVRP configuration information . . . . . . . . . . . . . . .350

Displaying GVRP VLAN information. . . . . . . . . . . . . . . . . . . . . .352

Displaying GVRP statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . .354

Displaying CPU utilization statistics . . . . . . . . . . . . . . . . . . . . .355

Displaying GVRP diagnostic information . . . . . . . . . . . . . . . . .356

Clearing GVRP statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .357

CLI examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .357

Dynamic core and fixed edge . . . . . . . . . . . . . . . . . . . . . . . . . .357

Dynamic core and dynamic edge . . . . . . . . . . . . . . . . . . . . . . .359

Fixed core and dynamic edge . . . . . . . . . . . . . . . . . . . . . . . . . .359

Fixed core and fixed edge . . . . . . . . . . . . . . . . . . . . . . . . . . . . .359

Chapter 13 Configuring Rule-Based IP Access Control Lists

ACL overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .361

Types of IP ACLs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .361

ACL IDs and entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .361

Numbered and named ACLs . . . . . . . . . . . . . . . . . . . . . . . . . . .362

Default ACL action . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .362

How hardware-based ACLs work . . . . . . . . . . . . . . . . . . . . . . . . . . .363

How fragmented packets are processed . . . . . . . . . . . . . . . . .363

Hardware aging of Layer 4 CAM entries . . . . . . . . . . . . . . . . . .363

Configuration considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .363

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Configuring standard numbered ACLs. . . . . . . . . . . . . . . . . . . . . . .364

Standard numbered ACL syntax . . . . . . . . . . . . . . . . . . . . . . . .364

Configuration example for standard numbered ACLs . . . . . . .366

Configuring standard named ACLs . . . . . . . . . . . . . . . . . . . . . . . . .366

Standard named ACL syntax. . . . . . . . . . . . . . . . . . . . . . . . . . .366

Configuration example for standard named ACLs. . . . . . . . . .368

Configuring extended numbered ACLs . . . . . . . . . . . . . . . . . . . . . .368

Extended numbered ACL syntax . . . . . . . . . . . . . . . . . . . . . . . .369

Configuration examples for extended numbered ACLs . . . . . .373

Configuring extended named ACLs . . . . . . . . . . . . . . . . . . . . . . . . . 374

Extended named ACL syntax. . . . . . . . . . . . . . . . . . . . . . . . . . .375

Configuration example for extended named ACLs. . . . . . . . . .379

Preserving user input for ACL TCP/UDP port numbers. . . . . . . . . .379

Managing ACL comment text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .379

Adding a comment to an entry in a numbered ACL. . . . . . . . .380

Applying an ACL to a virtual interface in a protocol-

or subnet-based VLAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .380

Enabling ACL logging. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .381

Enabling strict control of ACL filtering of fragmented packets. . . .383

Enabling ACL support for switched traffic in the router image . . .384

Enabling ACL filtering based on VLAN membership or VE port

membership . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .384

Applying an IPv4 ACL to specific VLAN members on

a port (Layer 2 devices only) . . . . . . . . . . . . . . . . . . . . . . . . . . .385

Applying an IPv4 ACL to a subset of ports on a virtual

interface (Layer 3 devices only) . . . . . . . . . . . . . . . . . . . . . . . .385

Filtering on IP precedence and ToS values . . . . . . . . . . . . . . . . . . .386

QoS options for IP ACLs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .387

Using an IP ACL to mark DSCP values (DSCP marking). . . . . .387

DSCP matching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .389

ACL-based rate limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .389

Using ACLs to control multicast features. . . . . . . . . . . . . . . . . . . . .390

Enabling and viewing hardware usage statistics for an ACL . . . . .391

Displaying ACL information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .391

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .392

Enabling and viewing hardware usage statistics for an ACL . . . . .392

Displaying ACL information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .392

Troubleshooting ACLs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .392

Chapter 14 Configuring Port Mirroring and Monitoring

Mirroring support by platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . .395

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Configuring port mirroring and monitoring . . . . . . . . . . . . . . . . . . .395

Configuration notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .395

Monitoring a port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .397

Monitoring an individual trunk port . . . . . . . . . . . . . . . . . . . . .397

ACL-based inbound mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .398

Creating an ACL-based inbound mirror clause for

PowerConnect B-Series TI24X devices . . . . . . . . . . . . . . . . . . .398

MAC filter-based mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .402

Configuring MAC filter-based mirroring on

PowerConnect B-Series TI24X devices . . . . . . . . . . . . . . . . . . .402

Chapter 15 Configuring Quality of Service

Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .405

Processing of classified traffic . . . . . . . . . . . . . . . . . . . . . . . . .405

QoS queues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .408

Assigning QoS priorities to traffic . . . . . . . . . . . . . . . . . . . . . . .408

Buffer allocation/threshold for QoS queues . . . . . . . . . . . . . .410

Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .410

Configuring DSCP-based QoS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .410

Application notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .411

Using ACLs to honor DSCP-based QoS . . . . . . . . . . . . . . . . . . .411

Configuring the QoS mappings. . . . . . . . . . . . . . . . . . . . . . . . . . . . .411

Default DSCP –> Internal forwarding priority mappings . . . . .411

Changing the DSCP –> internal forwarding priority mappings412 Changing the internal forwarding priority –> hardware

forwarding queue mappings . . . . . . . . . . . . . . . . . . . . . . . . . . .413

Scheduling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .414

QoS Queuing methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414

Selecting the QoS queuing method . . . . . . . . . . . . . . . . . . . . .415

Configuring the QoS queues . . . . . . . . . . . . . . . . . . . . . . . . . . .415

Viewing QoS settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .418

Viewing DSCP-based QoS settings. . . . . . . . . . . . . . . . . . . . . . . . . .418

Chapter 16 Configuring Rate Limiting and Rate Shaping on the PowerConnect B-

Series TI24X

Rate limiting overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .421

Rate limiting in hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .421

How Fixed Rate Limiting works . . . . . . . . . . . . . . . . . . . . . . . . .421

Configuration notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .422

Configuring a port-based rate limiting policy . . . . . . . . . . . . . .422

Configuring an ACL-based rate limiting policy . . . . . . . . . . . . .423

Displaying the fixed rate limiting configuration . . . . . . . . . . . .423

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Rate shaping overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .424

Configuration notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .424

Configuring outbound rate shaping for a port . . . . . . . . . . . . .424

Configuring outbound rate shaping for a specific priority. . . .425

Configuring outbound rate shaping for a trunk port . . . . . . . .425

Displaying rate shaping configurations . . . . . . . . . . . . . . . . . .425

Chapter 17 Configuring Traffic Policies

About traffic policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .427

Configuration notes and feature limitations . . . . . . . . . . . . . . . . . .427

Maximum number of traffic policies supported on a device . . . . .428

Setting the maximum number of traffic policies supported

on a Layer 3 device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .429

ACL-based rate limiting using traffic policies. . . . . . . . . . . . . . . . . .429

Support for fixed rate limiting and adaptive rate limiting . . . .430

Configuring ACL-based fixed rate limiting . . . . . . . . . . . . . . . . .430

Configuring ACL-based adaptive rate limiting . . . . . . . . . . . . .431

Specifying the action to be taken for packets that are

over the limit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .433

ACL and rate limit counting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .434

Enabling ACL statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .434

Enabling ACL statistics with rate limiting traffic policies. . . . .435

Viewing ACL and rate limit counters . . . . . . . . . . . . . . . . . . . . .436

Clearing ACL and rate limit counters . . . . . . . . . . . . . . . . . . . .437

Viewing traffic policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .437

Chapter 18 Configuring IP Multicast Traffic Reduction for PowerConnect B-

Series TI24X Switches

IGMP snooping overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .439

IGMP V1, V2, and V3 snooping support . . . . . . . . . . . . . . . . . .440

Queriers and non-queriers . . . . . . . . . . . . . . . . . . . . . . . . . . . .440

IGMP snooping enhancements. . . . . . . . . . . . . . . . . . . . . . . . .441

Configuration notes and feature limitations for

PowerConnect B-Series TI24X devices . . . . . . . . . . . . . . . . . . .441

PIM SM traffic snooping overview . . . . . . . . . . . . . . . . . . . . . . . . . .442

PIM SM snooping support . . . . . . . . . . . . . . . . . . . . . . . . . . . . .443

Application examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .443

Configuration notes and limitations . . . . . . . . . . . . . . . . . . . . .444

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Configuring IGMP snooping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .445

Enabling IGMP snooping globally on the device . . . . . . . . . . .447

Configuring the IGMP mode . . . . . . . . . . . . . . . . . . . . . . . . . . .447

Configuring the IGMP version . . . . . . . . . . . . . . . . . . . . . . . . . .448

Disabling IGMP snooping on a VLAN . . . . . . . . . . . . . . . . . . . .448

Disabling transmission and receipt of IGMP packets

on a port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .449

Modifying the age interval for group membership entries . . .449 Modifying the query interval (active IGMP snooping

mode only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .449

Modifying the maximum response time. . . . . . . . . . . . . . . . . .450

Configuring report control . . . . . . . . . . . . . . . . . . . . . . . . . . . . .450

Modifying the wait time before stopping traffic when receiving a

leave message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .450

Modifying the multicast cache age time . . . . . . . . . . . . . . . . .451

Enabling or disabling error and warning messages . . . . . . . .451

Configuring static router ports . . . . . . . . . . . . . . . . . . . . . . . . .451

Turning off static group proxy . . . . . . . . . . . . . . . . . . . . . . . . . .451

IGMP V3 membership tracking and fast leave . . . . . . . . . . . .452

Fast leave for IGMP V2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .452

Fast convergence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .453

Configuring PIM SM snooping . . . . . . . . . . . . . . . . . . . . . . . . . . . . .453

Enabling or disabling PIM SM snooping. . . . . . . . . . . . . . . . . .453

Enabling PIM SM snooping on a VLAN . . . . . . . . . . . . . . . . . . .454

Disabling PIM SM snooping on a VLAN . . . . . . . . . . . . . . . . . .454

IGMP snooping show commands. . . . . . . . . . . . . . . . . . . . . . . . . . .454

Displaying the IGMP snooping configuration . . . . . . . . . . . . . .454

Displaying IGMP snooping errors . . . . . . . . . . . . . . . . . . . . . . .455

Displaying IGMP group information . . . . . . . . . . . . . . . . . . . . .456

Displaying IGMP snooping mcache information . . . . . . . . . . .457

Displaying software resource usage for VLANs . . . . . . . . . . . .458

Displaying the status of IGMP snooping traffic . . . . . . . . . . . .459

PIM SM snooping show commands. . . . . . . . . . . . . . . . . . . . . . . . .460

Displaying PIM SM snooping information. . . . . . . . . . . . . . . . .460

Displaying PIM SM snooping information on a Layer 2 switch460 Displaying PIM SM snooping information for a specific

group or source group pair . . . . . . . . . . . . . . . . . . . . . . . . . . . .461

Clear commands for IGMP snooping . . . . . . . . . . . . . . . . . . . . . . . .462

Clearing the IGMP mcache . . . . . . . . . . . . . . . . . . . . . . . . . . . .462

Clearing the mcache on a specific VLAN . . . . . . . . . . . . . . . . .462

Clearing traffic on a specific VLAN . . . . . . . . . . . . . . . . . . . . . .463

Clearing IGMP counters on VLANs . . . . . . . . . . . . . . . . . . . . . .463

Chapter 19 Configuring IP Multicast Protocols

Overview of IP multicasting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .465

IPv4 multicast group addresses . . . . . . . . . . . . . . . . . . . . . . . .465

Mapping of IPv4 Multicast group addresses to

Ethernet MAC addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .466

Supported Layer 3 multicast routing protocols . . . . . . . . . . . .466

Multicast terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .466

PowerConnect B-Series TI24X Configuration Guide xv 53-1002269-02

Changing global IP multicast parameters . . . . . . . . . . . . . . . . . . . .467

Changing dynamic memory allocation for IP multicast groups467

Changing IGMP V1 and V2 parameters . . . . . . . . . . . . . . . . . .468

PIM Dense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .470

Initiating PIM multicasts on a network . . . . . . . . . . . . . . . . . . .470

Pruning a multicast tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .470

Grafts to a multicast Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . .472

PIM DM versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .472

Configuring PIM DM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .473

Failover time in a multi-path topology . . . . . . . . . . . . . . . . . . . 477

Modifying the TTL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .477

PIM Sparse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .478

PIM Sparse switch types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .478

RP paths and SPT paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .479

Configuring PIM Sparse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .479

Displaying PIM Sparse configuration information

and statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .489

Passive multicast route insertion. . . . . . . . . . . . . . . . . . . . . . . . . . .501

Multicast Source Discovery Protocol (MSDP) . . . . . . . . . . . . . . . . .501

Peer Reverse Path Forwarding (RPF) flooding . . . . . . . . . . . . .503

Source active caching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .503

Configuring MSDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .504

Designating an interface IP address as

the RP IP address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .505

Filtering MSDP source-group pairs . . . . . . . . . . . . . . . . . . . . . .506

MSDP mesh groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .509

Displaying MSDP information . . . . . . . . . . . . . . . . . . . . . . . . . .515

Clearing MSDP information. . . . . . . . . . . . . . . . . . . . . . . . . . . .519

Using ACLs to control multicast features. . . . . . . . . . . . . . . . . . . . .520

Using ACLs to limit static RP groups. . . . . . . . . . . . . . . . . . . . .520

Using ACLs to limit PIM RP candidate advertisement . . . . . . .522

Configuring a static multicast route. . . . . . . . . . . . . . . . . . . . . . . . .523

Tracing a multicast route . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .525

Displaying the multicast configuration for another multicast router526

IGMP V3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .527

Default IGMP version. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .528

Compatibility with IGMP V1 and V2 . . . . . . . . . . . . . . . . . . . . .528

Globally enabling the IGMP version . . . . . . . . . . . . . . . . . . . . .528

Enabling the IGMP version per interface setting. . . . . . . . . . .528

Enabling the IGMP version on a physical port within

a virtual routing interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . .529

Enabling membership tracking and fast leave . . . . . . . . . . . .529

Setting the query interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . .530

Setting the group membership time. . . . . . . . . . . . . . . . . . . . .530

Setting the maximum response time . . . . . . . . . . . . . . . . . . . .530

IGMP V3 and source specific multicast protocols . . . . . . . . . .531

Displaying IGMP V3 information on Layer 3 Switches. . . . . . .531

Clearing IGMP statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .535

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IGMP Proxy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .535

Configuration notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .535

Configuring IGMP Proxy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .536

Displaying IGMP Proxy traffic . . . . . . . . . . . . . . . . . . . . . . . . . .536

Chapter 20 Configuring LLDP

Terms used in this chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .537

LLDP overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .538

Benefits of LLDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .538

General operating principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .539

Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .539

LLDP packets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .540

TLV support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .540

MIB support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .543

Syslog messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .543

Configuring LLDP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .544

Configuration notes and considerations . . . . . . . . . . . . . . . . .544

Enabling and disabling LLDP. . . . . . . . . . . . . . . . . . . . . . . . . . .545

Changing a port LLDP operating mode . . . . . . . . . . . . . . . . . .545

Specifying the maximum number of LLDP neighbors. . . . . . .546

Enabling LLDP SNMP notifications and syslog messages . . .547 Changing the minimum time between LLDP transmissions. .548 Changing the interval between regular LLDP transmissions .548

Changing the holdtime multiplier for transmit TTL . . . . . . . . .549

Changing the minimum time between port reinitializations. .549

LLDP TLVs advertised by the device . . . . . . . . . . . . . . . . . . . . .549

Displaying LLDP statistics and configuration settings. . . . . . .555

LLDP configuration summary . . . . . . . . . . . . . . . . . . . . . . . . . .555

LLDP statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .556

LLDP neighbors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .557

LLDP neighbors detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .558

LLDP configuration details . . . . . . . . . . . . . . . . . . . . . . . . . . . .560

Resetting LLDP statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .561

Clearing cached LLDP neighbor information. . . . . . . . . . . . . . . . . .561

Chapter 21 Configuring IP

Basic configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .563

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .563

IP interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .564

IP packet flow through a Layer 3 Switch. . . . . . . . . . . . . . . . . .564

IP route exchange protocols . . . . . . . . . . . . . . . . . . . . . . . . . . .569

IP multicast protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .569

IP interface redundancy protocols . . . . . . . . . . . . . . . . . . . . . .570

Access Control Lists and IP access policies. . . . . . . . . . . . . . .570

PowerConnect B-Series TI24X Configuration Guide xvii 53-1002269-02

Basic IP parameters and defaults – Layer 3 Switches. . . . . . . . . .570

When parameter changes take effect . . . . . . . . . . . . . . . . . . . 571

IP global parameters – Layer 3 Switches. . . . . . . . . . . . . . . . . 571

IP interface parameters – Layer 3 Switches . . . . . . . . . . . . . .575

Basic IP parameters and defaults – Layer 2 Switches. . . . . . . . . . 576

IP global parameters – Layer 2 Switches. . . . . . . . . . . . . . . . .576

Interface IP parameters – Layer 2 Switches . . . . . . . . . . . . . .578

Configuring IP parameters – Layer 3 Switches . . . . . . . . . . . . . . . .578

Configuring IP addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .579

Configuring packet parameters . . . . . . . . . . . . . . . . . . . . . . . .581

Changing the router ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .584

Specifying a single source interface for Telnet,

TACACS/TACACS+, or RADIUS Packets . . . . . . . . . . . . . . . . . . .585

Configuring ARP parameters. . . . . . . . . . . . . . . . . . . . . . . . . . .587

Configuring forwarding parameters . . . . . . . . . . . . . . . . . . . . .592

Disabling ICMP messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . .594

Configuring static routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .596

Configuring a default network route . . . . . . . . . . . . . . . . . . . . .604

Configuring IP load sharing . . . . . . . . . . . . . . . . . . . . . . . . . . . .605

Configuring IRDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .608

Configuring RARP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .610

Configuring UDP broadcast and IP helper parameters . . . . . .612

Configuring BootP/DHCP relay parameters . . . . . . . . . . . . . . .615

Configuring IP parameters – Layer 2 Switches . . . . . . . . . . . . . . . . 616

Configuring the management IP address and specifying

the default gateway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .616

Configuring Domain Name Server (DNS) resolver. . . . . . . . . . 617

Changing the TTL threshold . . . . . . . . . . . . . . . . . . . . . . . . . . .619

Configuring DHCP Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .619

Displaying IP configuration information and statistics . . . . . . . . . .623

Changing the network mask display to prefix format . . . . . . .623

Displaying IP information – Layer 3 Switches . . . . . . . . . . . . .623

Displaying IP information – Layer 2 Switches . . . . . . . . . . . . .637

Chapter 22 Configuring RIP

RIP overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .643

ICMP host unreachable message for undeliverable ARPs . . .643

RIP parameters and defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .643

RIP global parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .644

RIP interface parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . .644

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Configuring RIP parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .645

Enabling RIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .645

Configuring metric parameters . . . . . . . . . . . . . . . . . . . . . . . . .646

Changing the administrative distance. . . . . . . . . . . . . . . . . . .647

Configuring redistribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . .647

Configuring route learning and advertising parameters . . . . .650

Changing the route loop prevention method . . . . . . . . . . . . . .651

Suppressing RIP route advertisement on a VRRP

or VRRPE backup interface . . . . . . . . . . . . . . . . . . . . . . . . . . . .652

Configuring RIP route filters . . . . . . . . . . . . . . . . . . . . . . . . . . .652

Displaying RIP filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .653

Displaying CPU utilization statistics . . . . . . . . . . . . . . . . . . . . . . . . .654

Chapter 23 Configuring OSPF Version 2 (IPv4)

Overview of OSPF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .657

OSPF point-to-point Links . . . . . . . . . . . . . . . . . . . . . . . . . . . . .658

Designated routers in multi-access networks . . . . . . . . . . . . .659

Designated router election in multi-access networks . . . . . . .659

OSPF RFC 1583 and 2178 compliance . . . . . . . . . . . . . . . . . .660

Reduction of equivalent AS External LSAs . . . . . . . . . . . . . . . .661

Support for OSPF RFC 2328 Appendix E . . . . . . . . . . . . . . . . .663

Dynamic OSPF activation and configuration . . . . . . . . . . . . . .664

PowerConnect B-Series TI24X Configuration Guide xix 53-1002269-02

Configuring OSPF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .665

Configuration rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .665

OSPF parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .665

Enable OSPF on the router . . . . . . . . . . . . . . . . . . . . . . . . . . . .666

Assign OSPF areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .667

Assigning an area range (optional). . . . . . . . . . . . . . . . . . . . . .671

Assigning interfaces to an area . . . . . . . . . . . . . . . . . . . . . . . .671

Modify interface defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . .671

Change the timer for OSPF authentication changes. . . . . . . . 674

Block flooding of outbound LSAs on specific OSPF interfaces675

Assign virtual links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .675

Modify virtual link parameters . . . . . . . . . . . . . . . . . . . . . . . . .677

Changing the reference bandwidth for the cost on

OSPF interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .678

Define redistribution filters . . . . . . . . . . . . . . . . . . . . . . . . . . . .680

Prevent specific OSPF routes from being installed in the

IP route table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .682

Modify default metric for redistribution . . . . . . . . . . . . . . . . . .685

Enable route redistribution . . . . . . . . . . . . . . . . . . . . . . . . . . . .686

Disable or re-enable load sharing. . . . . . . . . . . . . . . . . . . . . . .687

Configure external route summarization . . . . . . . . . . . . . . . . .688

Configure default route origination. . . . . . . . . . . . . . . . . . . . . .690

Modify SPF timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .691

Modify redistribution metric type . . . . . . . . . . . . . . . . . . . . . . .691

Modify administrative distance. . . . . . . . . . . . . . . . . . . . . . . . .692

Configure OSPF group Link State Advertisement

(LSA) pacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .693

Modify OSPF traps generated . . . . . . . . . . . . . . . . . . . . . . . . . .693

Modify OSPF standard compliance setting . . . . . . . . . . . . . . .694

Modify exit overflow interval . . . . . . . . . . . . . . . . . . . . . . . . . . .694

Specifying the types of OSPF Syslog messages to log . . . . . .695

Clearing OSPF information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .695

Clearing OSPF neighbor information . . . . . . . . . . . . . . . . . . . .695

Clearing OSPF topology information . . . . . . . . . . . . . . . . . . . . .696

Clearing redistributed routes from the OSPF routing table. . .696

Clearing information for OSPF areas . . . . . . . . . . . . . . . . . . . .696

Displaying OSPF information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .697

Displaying general OSPF configuration information . . . . . . . .697

Displaying CPU utilization statistics . . . . . . . . . . . . . . . . . . . . .698

Displaying OSPF area information . . . . . . . . . . . . . . . . . . . . . .700

Displaying OSPF neighbor information. . . . . . . . . . . . . . . . . . .700

Displaying OSPF interface information. . . . . . . . . . . . . . . . . . .702

Displaying OSPF route information . . . . . . . . . . . . . . . . . . . . . .704

Displaying OSPF external link state information . . . . . . . . . . .706

Displaying OSPF link state information . . . . . . . . . . . . . . . . . .707

Displaying the data in an LSA . . . . . . . . . . . . . . . . . . . . . . . . . .707

Displaying OSPF virtual neighbor information . . . . . . . . . . . . .708

Displaying OSPF virtual link information . . . . . . . . . . . . . . . . .708

Displaying OSPF ABR and ASBR information. . . . . . . . . . . . . .708

Displaying OSPF trap status . . . . . . . . . . . . . . . . . . . . . . . . . . .709

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Chapter 24 Configuring VRRP and VRRPE

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .711

Overview of VRRP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .711

Overview of VRRPE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .716

Configuration note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .719

Comparison of VRRP and VRRPE. . . . . . . . . . . . . . . . . . . . . . . . . . . 719

VRRP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 719

VRRPE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .719

Architectural differences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 719

VRRP and VRRPE parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . .720

Configuring basic VRRP parameters . . . . . . . . . . . . . . . . . . . . . . . .722

Configuring the Owner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .723

Configuring a Backup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .723

Configuration rules for VRRP. . . . . . . . . . . . . . . . . . . . . . . . . . .723

Configuring basic VRRPE parameters . . . . . . . . . . . . . . . . . . . . . . .723

Configuration rules for VRRPE . . . . . . . . . . . . . . . . . . . . . . . . .724

Note regarding disabling VRRP or VRRPE . . . . . . . . . . . . . . . . . . . .724

Configuring additional VRRP and VRRPE parameters . . . . . . . . . .724

Forcing a Master router to abdicate to a standby router . . . . . . . .731

Displaying VRRP and VRRPE information . . . . . . . . . . . . . . . . . . . .732

Displaying summary information . . . . . . . . . . . . . . . . . . . . . . .732

Displaying detailed information . . . . . . . . . . . . . . . . . . . . . . . .734

Displaying statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .739

Clearing VRRP or VRRPE statistics . . . . . . . . . . . . . . . . . . . . . .740

Displaying CPU utilization statistics . . . . . . . . . . . . . . . . . . . . . 740

Configuration examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .742

VRRP example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .742

VRRPE example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .743

Chapter 25 Configuring BGP4

Overview of BGP4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .745

Relationship between the BGP4 route table and the IP route table 74 6

How BGP4 selects a path for a route . . . . . . . . . . . . . . . . . . . . 747

BGP4 message types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 748

Basic configuration and activation for BGP4 . . . . . . . . . . . . . . . . .750

Note regarding disabling BGP4. . . . . . . . . . . . . . . . . . . . . . . . .751

BGP4 parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .751

When parameter changes take effect . . . . . . . . . . . . . . . . . . .752

Memory considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .754

Memory configuration options obsoleted by dynamic memory754

PowerConnect B-Series TI24X Configuration Guide xxi 53-1002269-02

Basic configuration tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .755

Enabling BGP4 on the router . . . . . . . . . . . . . . . . . . . . . . . . . .755

Changing the router ID. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .755

Setting the local AS number . . . . . . . . . . . . . . . . . . . . . . . . . . .756

Adding a loopback interface . . . . . . . . . . . . . . . . . . . . . . . . . . .756

Adding BGP4 neighbors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .756

Adding a BGP4 peer group . . . . . . . . . . . . . . . . . . . . . . . . . . . .763

Optional configuration tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .767

Changing the Keep Alive Time and Hold Time . . . . . . . . . . . . .767

Changing the BGP4 next-hop update timer . . . . . . . . . . . . . . .768

Enabling fast external fallover. . . . . . . . . . . . . . . . . . . . . . . . . .768

Changing the maximum number of paths for

BGP4 load sharing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .769

Customizing BGP4 load sharing . . . . . . . . . . . . . . . . . . . . . . . .770

Specifying a list of networks to advertise. . . . . . . . . . . . . . . . . 771

Changing the default local preference . . . . . . . . . . . . . . . . . . .772

Using the IP default route as a valid next hop for

a BGP4 route . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .773

Advertising the default route. . . . . . . . . . . . . . . . . . . . . . . . . . .773

Changing the default MED (Metric) used for

route redistribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .773

Enabling next-hop recursion . . . . . . . . . . . . . . . . . . . . . . . . . . .774

Changing administrative distances . . . . . . . . . . . . . . . . . . . . .777

Requiring the first AS to be the neighbor AS . . . . . . . . . . . . . .778

Disabling or re-enabling comparison of the AS-Path length . .778

Enabling or disabling comparison of the router IDs . . . . . . . .779

Configuring the Layer 3 Switch to always compare

Multi-Exit Discriminators (MEDs) . . . . . . . . . . . . . . . . . . . . . . .779

Treating missing MEDs as the worst MEDs . . . . . . . . . . . . . . .780

Configuring route reflection parameters . . . . . . . . . . . . . . . . .780

Aggregating routes advertised to BGP4 neighbors . . . . . . . . .784

Modifying redistribution parameters . . . . . . . . . . . . . . . . . . . . . . . .785

Redistributing connected routes. . . . . . . . . . . . . . . . . . . . . . . .785

Redistributing RIP routes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .786

Redistributing OSPF external routes. . . . . . . . . . . . . . . . . . . . .786

Redistributing static routes. . . . . . . . . . . . . . . . . . . . . . . . . . . .787

Disabling or re-enabling re-advertisement of all learned

BGP4 routes to all BGP4 neighbors . . . . . . . . . . . . . . . . . . . . .787

Redistributing IBGP routes into RIP and OSPF. . . . . . . . . . . . .788

Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .788

Filtering specific IP addresses . . . . . . . . . . . . . . . . . . . . . . . . .788

Filtering AS-paths. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .790

Filtering communities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .793

Defining IP prefix lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .795

Defining neighbor distribute lists . . . . . . . . . . . . . . . . . . . . . . .796

Defining route maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .797

Using a table map to set the rag value. . . . . . . . . . . . . . . . . . .805

Configuring cooperative BGP4 route filtering. . . . . . . . . . . . . .806

xxii PowerConnect B-Series TI24X Configuration Guide

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Configuring route flap dampening . . . . . . . . . . . . . . . . . . . . . . . . . .809

Globally configuring route flap dampening . . . . . . . . . . . . . . .810

Using a route map to configure route flap dampening

for specific routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .810

Using a route map to configure route flap dampening for

a specific neighbor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .811

Removing route dampening from a route. . . . . . . . . . . . . . . . .812

Removing route dampening from a neighbor routes

suppressed due to aggregation . . . . . . . . . . . . . . . . . . . . . . . .812

Displaying and clearing route flap dampening statistics . . . .814

Generating traps for BGP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .815

Displaying BGP4 information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .816

Displaying summary BGP4 information . . . . . . . . . . . . . . . . . . 816

Displaying the active BGP4 configuration . . . . . . . . . . . . . . . .818

Displaying CPU utilization statistics . . . . . . . . . . . . . . . . . . . . .819

Displaying summary neighbor information . . . . . . . . . . . . . . .820

Displaying BGP4 neighbor information. . . . . . . . . . . . . . . . . . .822

Displaying peer group information . . . . . . . . . . . . . . . . . . . . . .833

Displaying summary route information . . . . . . . . . . . . . . . . . .834

Displaying the BGP4 route table. . . . . . . . . . . . . . . . . . . . . . . .835

Displaying BGP4 route-attribute entries. . . . . . . . . . . . . . . . . .841

Displaying the routes BGP4 has placed in the

IP route table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .842

Displaying route flap dampening statistics . . . . . . . . . . . . . . .843

Displaying the active route map configuration . . . . . . . . . . . .844

Updating route information and resetting a neighbor session . . .845

Using soft reconfiguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .845

Dynamically requesting a route refresh from

a BGP4 neighbor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .848

Closing or resetting a neighbor session . . . . . . . . . . . . . . . . . .851

Clearing and resetting BGP4 routes in the IP route table . . . .851

Clearing traffic counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .852

Clearing route flap dampening statistics. . . . . . . . . . . . . . . . . . . . .852

Removing route flap dampening . . . . . . . . . . . . . . . . . . . . . . . . . . .852

Clearing diagnostic buffers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .853

Chapter 26 Securing Access to Management Functions

Securing access methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .855

PowerConnect B-Series TI24X Configuration Guide xxiii 53-1002269-02

Restricting remote access to management functions . . . . . . . . . .857

Using ACLs to restrict remote access . . . . . . . . . . . . . . . . . . . .857

Defining the console idle time . . . . . . . . . . . . . . . . . . . . . . . . .859

Restricting remote access to the device to specific IP addresses860 Restricting access to the device based on IP or

MAC address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .861

Specifying the maximum number of login attempts

for Telnet access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .861

Restricting remote access to the device to specific

VLAN IDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .862

Designated VLAN for Telnet management sessions to a Layer 2

Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .863

Device management security . . . . . . . . . . . . . . . . . . . . . . . . . .863

Disabling specific access methods. . . . . . . . . . . . . . . . . . . . . .864

Setting passwords. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .865

Setting a Telnet password . . . . . . . . . . . . . . . . . . . . . . . . . . . . .866

Setting passwords for management privilege levels. . . . . . . .866

Recovering from a lost password . . . . . . . . . . . . . . . . . . . . . . .868

Displaying the SNMP community string . . . . . . . . . . . . . . . . . .869

Disabling password encryption . . . . . . . . . . . . . . . . . . . . . . . . .869

Specifying a minimum password length. . . . . . . . . . . . . . . . . .869

Setting up local user accounts. . . . . . . . . . . . . . . . . . . . . . . . . . . . .870

Enhancements to username and password . . . . . . . . . . . . . .870

Configuring a local user account . . . . . . . . . . . . . . . . . . . . . . . 874

Create password option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .876

Changing a local user password . . . . . . . . . . . . . . . . . . . . . . . .876

Configuring TACACS/TACACS+ security . . . . . . . . . . . . . . . . . . . . . .877

How TACACS+ differs from TACACS. . . . . . . . . . . . . . . . . . . . . .877

TACACS/TACACS+ authentication, authorization,

and accounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 877

TACACS authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .878

TACACS/TACACS+ configuration considerations . . . . . . . . . . .881

Enabling TACACS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .881

Identifying the TACACS/TACACS+ servers. . . . . . . . . . . . . . . . .882

Specifying different servers for individual AAA functions . . . .883

Setting optional TACACS/TACACS+ parameters . . . . . . . . . . . .883

Configuring authentication-method lists for TACACS/TACACS+884

Configuring TACACS+ authorization . . . . . . . . . . . . . . . . . . . . .886

Configuring TACACS+ accounting . . . . . . . . . . . . . . . . . . . . . . .889

Configuring an interface as the source for all

TACACS/TACACS+ packets. . . . . . . . . . . . . . . . . . . . . . . . . . . . .891

Displaying TACACS/TACACS+ statistics and

configuration information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .891

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Configuring RADIUS security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .892

RADIUS authentication, authorization, and accounting . . . . .893

RADIUS configuration considerations. . . . . . . . . . . . . . . . . . . .896

RADIUS configuration procedure . . . . . . . . . . . . . . . . . . . . . . .896

Configuring Dell-specific attributes on the RADIUS server . . .896

Enabling SNMP to configure RADIUS . . . . . . . . . . . . . . . . . . . .897

Identifying the RADIUS server to the device. . . . . . . . . . . . . . .898

Specifying different servers for individual AAA functions . . . .898

Configuring a RADIUS server per port . . . . . . . . . . . . . . . . . . .898

Mapping a RADIUS server to individual ports . . . . . . . . . . . . .899

Setting RADIUS parameters . . . . . . . . . . . . . . . . . . . . . . . . . . .900

Configuring authentication-method lists for RADIUS. . . . . . . .901

Configuring RADIUS authorization . . . . . . . . . . . . . . . . . . . . . .903

Configuring RADIUS accounting . . . . . . . . . . . . . . . . . . . . . . . .905

Configuring an interface as the source for all

RADIUS packets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .906

Displaying RADIUS configuration information . . . . . . . . . . . . .906

Configuring authentication-method lists . . . . . . . . . . . . . . . . . . . . .907

Configuration considerations for authentication- method lists908

Examples of authentication-method lists. . . . . . . . . . . . . . . . .909

Chapter 27 Configuring SSH2 and SCP

SSH version 2 support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .911

Tested SSH2 clients. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .911

Supported features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .912

Unsupported features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .912

AES encryption for SSH2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .912

Configuring SSH2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .913

Recreating SSH keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .914

Generating a host key pair . . . . . . . . . . . . . . . . . . . . . . . . . . . .914

Configuring DSA challenge-response authentication . . . . . . .915

Setting optional parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .917

Setting the number of SSH authentication retries . . . . . . . . .918

Deactivating user authentication . . . . . . . . . . . . . . . . . . . . . . .918

Enabling empty password logins. . . . . . . . . . . . . . . . . . . . . . . .918

Setting the SSH port number . . . . . . . . . . . . . . . . . . . . . . . . . .919

Setting the SSH login timeout value. . . . . . . . . . . . . . . . . . . . .919

Designating an interface as the source for all SSH

packets (Layer 3 code only). . . . . . . . . . . . . . . . . . . . . . . . . . . .919

Configuring the maximum idle time for SSH sessions . . . . . .920

Filtering SSH access using ACLs . . . . . . . . . . . . . . . . . . . . . . . . . . .920

Terminating an active SSH connection . . . . . . . . . . . . . . . . . . . . . .920

Displaying SSH connection information . . . . . . . . . . . . . . . . . . . . .920

Using Secure copy with SSH2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .922

Enabling and disabling SCP . . . . . . . . . . . . . . . . . . . . . . . . . . .922

Example file transfers using SCP . . . . . . . . . . . . . . . . . . . . . . .922

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Chapter 28 Configuring 802.1X Port Security

IETF RFC support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .925

How 802.1X port security works . . . . . . . . . . . . . . . . . . . . . . . . . . .925

Device roles in an 802.1X configuration . . . . . . . . . . . . . . . . .925

Communication between the devices . . . . . . . . . . . . . . . . . . .926

Controlled and uncontrolled ports . . . . . . . . . . . . . . . . . . . . . .928

Message exchange during authentication. . . . . . . . . . . . . . . .929

Authenticating multiple hosts connected to the same port . .931

802.1X port security and sFlow . . . . . . . . . . . . . . . . . . . . . . . .933

Configuring 802.1X port security. . . . . . . . . . . . . . . . . . . . . . . . . . .933

Configuring an authentication method list for 802.1X . . . . . .934

Setting RADIUS parameters . . . . . . . . . . . . . . . . . . . . . . . . . . .934

Configuring dynamic VLAN assignment for 802.1X ports . . . .938

Dynamically applying IP ACLs and MAC filters to

802.1X ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .941

Enabling 802.1X port security. . . . . . . . . . . . . . . . . . . . . . . . . .945

Setting the port control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .945

Configuring periodic re-authentication . . . . . . . . . . . . . . . . . . .946

Re-authenticating a port manually . . . . . . . . . . . . . . . . . . . . . .947

Setting the quiet period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .947

Specifying the wait interval and number of EAP-request/ identity frame retransmissions from the

PowerConnect device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .947

Specifying the wait interval and number of EAP-request/

identity frame retransmissions from the RADIUS server . . . .948

Specifying a timeout for retransmission of messages to the

authentication server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .949

Initializing 802.1X on a port . . . . . . . . . . . . . . . . . . . . . . . . . . .949

Allowing access to multiple hosts. . . . . . . . . . . . . . . . . . . . . . .949

Configuring VLAN access for non-EAP-capable clients . . . . . .952

Displaying 802.1X information. . . . . . . . . . . . . . . . . . . . . . . . . . . . .953

Displaying 802.1X configuration information . . . . . . . . . . . . .953

Displaying 802.1X statistics . . . . . . . . . . . . . . . . . . . . . . . . . . .955

Clearing 802.1X statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . .956

Displaying dynamically assigned VLAN information . . . . . . . .957

Displaying information about dynamically applied

MAC filters and IP ACLs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .958

Displaying 802.1X multiple-host authentication

information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .959

Sample 802.1X configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . .963

Point-to-point configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . .963

Hub configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .964

802.1X Authentication with dynamic VLAN assignment . . . . .965

Using multi-device port authentication and 802.1X security

on the same port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .966

Configuring Dell-specific attributes on the RADIUS server . . .967

Example configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .968

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Chapter 29 Using the MAC Port Security Feature

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .973

Local and global resources . . . . . . . . . . . . . . . . . . . . . . . . . . . .973

Configuration notes and feature limitations . . . . . . . . . . . . . . 974

Configuring the MAC port security feature . . . . . . . . . . . . . . . . . . . 974

Enabling the MAC port security feature . . . . . . . . . . . . . . . . . . 974

Setting the maximum number of secure MAC addresses

for an interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .975

Setting the port security age timer . . . . . . . . . . . . . . . . . . . . . .975

Specifying secure MAC addresses . . . . . . . . . . . . . . . . . . . . . .975

Autosaving secure MAC addresses to the

startup-config file. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 976

Specifying the action taken when a security

violation occurs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 976

Clearing port security statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . .978

Clearing restricted MAC addresses. . . . . . . . . . . . . . . . . . . . . .978

Clearing violation statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . .978

Displaying port security information . . . . . . . . . . . . . . . . . . . . . . . .978

Displaying port security settings . . . . . . . . . . . . . . . . . . . . . . . .978

Displaying the secure MAC addresses . . . . . . . . . . . . . . . . . . .979

Displaying port security statistics . . . . . . . . . . . . . . . . . . . . . . .979

Displaying restricted MAC addresses on a port . . . . . . . . . . . .980

Chapter 30 Configuring Multi-Device Port Authentication

How multi-device port authentication works. . . . . . . . . . . . . . . . . .981

RADIUS authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .981

Authentication-failure actions . . . . . . . . . . . . . . . . . . . . . . . . . .982

Supported RADIUS attributes . . . . . . . . . . . . . . . . . . . . . . . . . .982

Support for dynamic VLAN assignment . . . . . . . . . . . . . . . . . .983

Support for dynamic ACLs . . . . . . . . . . . . . . . . . . . . . . . . . . . . .983

Support for authenticating multiple MAC addresses

on an interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .983

Using multi-device port authentication and

802.1X security on the same port . . . . . . . . . . . . . . . . . . . . . . . . . .983

Configuring Dell-specific attributes on the RADIUS server . . .984

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Configuring multi-device port authentication . . . . . . . . . . . . . . . . .985

Enabling multi-device port authentication . . . . . . . . . . . . . . . .985

Specifying the format of the MAC addresses sent

to the RADIUS server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .986

Specifying the authentication-failure action . . . . . . . . . . . . . .986

Generating traps for multi-device port authentication . . . . . .987

Defining MAC address filters. . . . . . . . . . . . . . . . . . . . . . . . . . .987

Configuring dynamic VLAN assignment . . . . . . . . . . . . . . . . . .988

Dynamically applying IP ACLs to authenticated MAC

addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .990

Enabling denial of service attack protection . . . . . . . . . . . . . .992

Clearing authenticated MAC addresses. . . . . . . . . . . . . . . . . .993

Disabling aging for authenticated MAC addresses . . . . . . . . .993

Changing the hardware aging period for blocked

MAC addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .994

Specifying the aging time for blocked MAC addresses . . . . . .995

Specifying the RADIUS timeout action . . . . . . . . . . . . . . . . . . .995

Multi-device port authentication password override . . . . . . . .996

Limiting the number of authenticated MAC addresses. . . . . .997

Displaying multi-device port authentication information . . . . . . . .997

Displaying authenticated MAC address information . . . . . . . .997

Displaying multi-device port authentication configuration

information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .998

Displaying multi-device port authentication information

for a specific MAC address or port . . . . . . . . . . . . . . . . . . . . . .998

Displaying the authenticated MAC addresses . . . . . . . . . . . . .999

Displaying the non-authenticated MAC addresses . . . . . . . . .999

Displaying multi-device port authentication

information for a port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000

Displaying multi-device port authentication settings

and authenticated MAC addresses . . . . . . . . . . . . . . . . . . . .1001

Chapter 31 Protecting Against Denial of Service Attacks

Protecting against Smurf attacks. . . . . . . . . . . . . . . . . . . . . . . . . 1005

Avoiding being an intermediary in a Smurf attack. . . . . . . . 1005

Avoiding being a victim in a Smurf attack . . . . . . . . . . . . . . 1006

Protection against ICMP attacks in PowerConnect devices 1006

Protecting against TCP SYN attacks. . . . . . . . . . . . . . . . . . . . . . . .1007

Protection against TCP-SYN attacks in PowerConnect

devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1007

TCP security enhancement . . . . . . . . . . . . . . . . . . . . . . . . . . 1008

Displaying statistics about packets dropped

because of DoS attacks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1009

Displaying statistics about packets dropped because of

DoS attacks in PowerConnect devices . . . . . . . . . . . . . . . . .1010

Chapter 32 Securing SNMP Access

SNMP overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1011

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Establishing SNMP community strings . . . . . . . . . . . . . . . . . . . . .1011

Encryption of SNMP community strings . . . . . . . . . . . . . . . . .1012

Adding an SNMP community string . . . . . . . . . . . . . . . . . . . .1012

Displaying the SNMP community strings . . . . . . . . . . . . . . . .1013

Configuring your NMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1014

Configuring SNMP version 3 . . . . . . . . . . . . . . . . . . . . . . . . . .1015

Defining the engine id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1015

Defining an SNMP group . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1016

Defining an SNMP user account. . . . . . . . . . . . . . . . . . . . . . .1017

Defining SNMP views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1018

SNMP version 3 traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1019

Defining an SNMP group and specifying which

view is notified of traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1019

Trap MIB changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1021

Specifying an IPv6 host as an SNMP trap receiver . . . . . . . .1021

Displaying SNMP Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1022

Displaying the Engine ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1022

Displaying SNMP groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1022

Displaying user information. . . . . . . . . . . . . . . . . . . . . . . . . . 1022

Interpreting varbinds in report packets . . . . . . . . . . . . . . . . 1023

SNMP v3 Configuration examples . . . . . . . . . . . . . . . . . . . . . . . . 1023

Simple SNMP v3 configuration . . . . . . . . . . . . . . . . . . . . . . . 1023

More detailed SNMP v3 configuration . . . . . . . . . . . . . . . . . .1024

Chapter 33 Enabling the Foundry Discovery Protocol and Reading Cisco

Discovery Protocol Packets

Using FDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1025

Configuring FDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1025

Displaying FDP information. . . . . . . . . . . . . . . . . . . . . . . . . . 1026

Clearing FDP and CDP information. . . . . . . . . . . . . . . . . . . . 1029

Reading CDP packets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1030

Enabling interception of CDP packets globally . . . . . . . . . . 1030

Enabling interception of CDP packets on an interface . . . . 1030

Displaying CDP information. . . . . . . . . . . . . . . . . . . . . . . . . . 1030

Clearing CDP information . . . . . . . . . . . . . . . . . . . . . . . . . . . 1032

Chapter 34 Using Syslog

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1035

Displaying Syslog messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1036

Enabling real-time display of Syslog messages. . . . . . . . . . 1036

Enabling real-time display for a Telnet or SSH session. . . . 1036

Show log on all terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . .1037

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Configuring the Syslog service . . . . . . . . . . . . . . . . . . . . . . . . . . . .1037

Displaying the Syslog configuration . . . . . . . . . . . . . . . . . . . .1037

Disabling or re-enabling Syslog. . . . . . . . . . . . . . . . . . . . . . . .1041

Specifying a Syslog server. . . . . . . . . . . . . . . . . . . . . . . . . . . .1041

Specifying an additional Syslog server. . . . . . . . . . . . . . . . . .1041

Disabling logging of a message level . . . . . . . . . . . . . . . . . . 1042

Changing the number of entries the local buffer can hold. 1042

Changing the log facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1042

Displaying Interface names in Syslog messages. . . . . . . . . 1043

Displaying TCP or UDP port numbers in Syslog messages . 1044

Clearing the Syslog messages from the local buffer . . . . . . 1044

Syslog messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1044

Appendix A Network Monitoring

Basic management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1069

Viewing system information . . . . . . . . . . . . . . . . . . . . . . . . . 1069

Viewing configuration information . . . . . . . . . . . . . . . . . . . . 1069

Viewing port statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1070

Viewing STP statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1072

Clearing statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1072

Traffic counters for outbound traffic. . . . . . . . . . . . . . . . . . . .1073

RMON support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1076

Maximum number of entries allowed in the

RMON control table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1076

Statistics (RMON group 1). . . . . . . . . . . . . . . . . . . . . . . . . . . .1076

History (RMON group 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1078

Alarm (RMON group 3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1079

Event (RMON group 9). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1079

sFlow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1079

sFlow support for IPv6 packets. . . . . . . . . . . . . . . . . . . . . . . 1080

Configuration considerations . . . . . . . . . . . . . . . . . . . . . . . . .1081

Configuring and enabling sFlow . . . . . . . . . . . . . . . . . . . . . . 1082

Displaying sFlow information . . . . . . . . . . . . . . . . . . . . . . . . .1087

Configuring a utilization list for an uplink port . . . . . . . . . . . . . . 1090

Command syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1090

Displaying utilization percentages for an uplink . . . . . . . . . .1091

Appendix B Software Specifications

IEEE compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1093

RFC support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1093

Internet drafts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1098

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Dell PowerConnect B-TI24X Quick Reference Guide

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