Cisco Systems ME 3400 Configuring Flex Links and the MAC Address-Table Move Update Feature

CHAPT ER

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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide

OL-9639-06

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 Cisco ME 3400 switch

that are used to 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. These features

are available only when the switch is running the metro IP access or metro access image.

Note 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 Update, page 18-1

• Configuring Flex Links and MAC Address-Table Move Update, page 18-7

• Monitoring Flex Links and the MAC Address-Table Move Update, page 18-14

This section contains information about these features:

• Flex Links, page 18-1

• VLAN Flex Link Load Balancing and Support, page 18-2

• Flex Link Multicast Fast Convergence, page 18-3

• MAC Address-Table Move Update, page 18-6

Flex Links are a pair of a Layer 2 interfaces (switchports 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), allowing users to turn off STP and still provide basic link redundancy. Flex Links