Configuring Flex Links - Cisco Catalyst 4500 Series Software Configuration Manual

Configuring Flex Links

Configuring Flex Links
To configure a pair of Flex Links, perform this task:
Command
Step 1
Switch# configure terminal
Step 2
Switch(conf)# interface interface-id
Step 3
Switch(conf-if)# switchport backup interface
interface-id
Step 4
Switch(conf-if)# end
Step 5
Switch# show interface [interface-id] switchport
backup
Step 6
Switch# copy running-config startup config
To disable a Flex Links backup interface, enter the no switchport backup interface interface-id
interface configuration command.
This example shows how to configure an interface with a backup interface and to verify the
configuration:
Switch# configure terminal
Switch(conf)# interface fastethernet1/1
Switch(conf-if)# switchport backup interface fastethernet1/2
Switch(conf-if)# end
Switch# show interface switchport backup
Switch Backup Interface Pairs:
Active Interface
------------------------------------------------------------------------
FastEthernet1/1
FastEthernet1/3
Port-channel1
To configure a preemption scheme for a pair of Flex Links, perform this task:
Command
Step 1
Switch# configure terminal
Step 2
Switch(conf)# interface interface-id
Step 3
Switch(conf-if)# switchport backup interface
interface-id
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
24-6
Chapter 24 Configuring Flex Links and MAC Address-Table Move Update
Purpose
Enters global configuration mode.
Specifies the interface, and enters interface configuration
mode. The interface might be a physical Layer 2 interface
or a port channel (logical interface). The port channel
range is 1 to 64.
Configures a physical Layer 2 interface (or port channel)
as part of a Flex Links pair with the interface. When one
link is forwarding traffic, the other interface is in standby
mode.
Returns to privileged EXEC mode.
Verifies the configuration.
(Optional) Saves your entries in the switch startup
configuration file.
Backup Interface
FastEthernet1/2
FastEthernet1/4
GigabitEthernet1/1
Purpose
Enters global configuration mode.
Specifies the interface, and enters interface configuration
mode. The interface might be a physical Layer 2 interface
or a port channel (logical interface). The port channel
range is 1 to 64.
Configures a physical Layer 2 interface (or port channel)
as part of a Flex Links pair with the interface. When one
link is forwarding traffic, the other interface is in standby
mode.
State
Active Up/Backup Standby
Active Up/Backup Standby
Active Up/Backup Standby