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Catalyst 3560 Switch Command Reference
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Chapter 2 Catalyst 3560 Switch Cisco IOS Commands
switchport backup interface
• Neither of the links can be a port that belongs to an EtherChannel. However, you can configure two
port channels (EtherChannel logical interfaces) as Flex Links, and you can configure a port channel
and a physical interface as Flex Links, with either the port channel or the physical interface as the
primary link.
• If STP is configured on the switch, Flex Links do not participate in STP in all valid VLANs. If STP
is not running, be sure that there are no loops in the configured topology.
Examples This example shows how to configure two interfaces as Flex Links:
Switch# configure terminal
Switch(conf)# interface fastethernet0/1
Switch(conf-if)# switchport backup interface fastethernet0/2
Switch(conf-if)# end
You can verify your setting by entering the show interfaces switchport backup privileged EXEC
command.
Related Commands Command Description
show interfaces [interface-id]
switchport backup
Displays the configured Flex Links and their status on the switch or
for the specified interface.
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