Cisco Systems 3750E manual Configuring Flex Links, Switchport backup interface interface-id, 21-6

Chapter 21 Configuring Flex Links and the MAC Address-Table Move Update Feature

Configuring Flex Links and MAC Address-Table Move Update

Configuring Flex Links and MAC Address-Table Move Update

This section contains this information:

•Configuring Flex Links, page 21-6

•Configuring VLAN Load Balancing on Flex Links, page 21-8

•Configuring the MAC Address-Table Move Update Feature, page 21-9

Configuring Flex Links

Beginning in privileged EXEC mode, follow these steps to configure a pair of Flex Links:

	Command	Purpose
Step 1
	configure terminal	Enter global configuration mode.
Step 2
	interface interface-id	Specify the interface, and enter interface configuration
		mode. The interface can be a physical Layer 2 interface or
		a port channel (logical interface). The port-channel range
		is 1 to 48.
Step 3
	switchport backup interface interface-id	Configure a physical Layer 2 interface (or port channel)
		as part of a Flex Link pair with the interface. When one
		link is forwarding traffic, the other interface is in standby
		mode.
Step 4
	end	Return to privileged EXEC mode.
Step 5
	show interface [interface-id]switchport backup	Verify the configuration.
Step 6
	copy running-config startup config	(Optional) Save your entries in the switch startup
		configuration file.

This example shows how to configure an interface with a backup interface and to verify the configuration:

Switch# configure terminal

Switch(conf)# interface gigabitethernet1/0/1

Switch(conf-if)#switchport backup interface gigabitethernet1/0/2

Switch(conf-if)# end

Switch# show interface switchport backup

Switch Backup Interface Pairs:

Active Interface Backup Interface State

------------------------------------------------------------------------

GigabitEthernet1/0/1 GigabitEthernet1/0/2 Active Up/Backup Standby

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

21-6 OL-9775-02