Flex Links - Cisco Catalyst 3120 Software Manual

Catalyst blade switch for hp

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Configuring Flex Links and the MAC

Address-Table Move Update Feature

This chapter describes how to configure Flex Links, a pair of interfaces on the switch that provide a

mutual backup. It also describes how to configure the MAC address-table move update feature, also

referred to as the Flex Links bidirectional fast convergence feature. Unless otherwise noted, the term

switch refers to a standalone switch and to a switch stack.

For complete syntax and usage information for the commands used in this chapter, see the command

reference for this release.

The chapter consists of these sections:

Understanding Flex Links and the MAC Address-Table Move

This section contains this information:

Flex Links

Flex Links are a pair of a Layer 2 interfaces (switch ports or port channels) where one interface is

configured to act as a backup to the other. The feature provides an alternative solution to the Spanning

Tree Protocol (STP). Users can disable STP and still retain basic link redundancy. Flex Links are

typically configured in service provider or enterprise networks where customers do not want to run STP

on the switch. If the switch is running STP, Flex Links is not necessary because STP already provides

link-level redundancy or backup.

Understanding Flex Links and the MAC Address-Table Move Update, page 20-1

Configuring Flex Links and MAC Address-Table Move Update, page 20-5

Monitoring Flex Links and the MAC Address-Table Move Update, page 20-11

Flex Links, page 20-1

VLAN Flex Link Load Balancing and Support, page 20-2

MAC Address-Table Move Update, page 20-3

C H A P T E R

Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide

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