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18-3
Catalyst 2960 Switch Software Configuration Guide
78-16881-01
Chapter 18 Configuring Flex Links
Monitoring Flex Links
Configuring Flex Links
Beginning in privileged EXEC mode, follow these steps to configure a pair of Flex Links:
This example shows how to configure an interface with a backup interface and to verify the
configuration:
Switch# configure terminal
Switch(conf)# interface fastethernet0/1
Switch(conf-if)# switchport backup interface fastethernet0/2
Switch(conf-if)# end
Switch# show interface switchport backup
Switch Backup Interface Pairs:
Active Interface Backup Interface State
------------------------------------------------------------------------------------------
FastEthernet0/1 FastEthernet0/2 Active Up/Backup Standby
FastEthernet0/3 FastEthernet0/4 Active Up/Backup Standby
Port-channel1 GigabitEthernet0/1 Active Up/Backup Standby
Monitoring Flex Links
Table 18-1 shows the privileged EXEC command for monitoring Flex Link configuration.
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 6.
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.
Table 18-1 Flex Link Monitoring Command
Command Purpose
show interface
[interface-id] switchport
backup
Displays the Flex Link backup interface configured for an interface, or
displays all Flex Links configured on the switch and the state of each
active and backup interface (up or standby mode).