Cisco Systems 3560 Manual De Usuario

This chapter describes how to configure Flex Links, a pair of interfaces on the Catalyst 3560 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.

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:

This section contains this information:

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.