Cisco Catalyst 3750 Metro Command Reference Manual page 731

Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands
Vlans Preferred on Active Interface: 1-50
Vlans Preferred on Backup Interface: 60, 100-120
The following example shows how to configure multicast fast-convergence on interface Gi1/0/11:
Switch# configure terminal
Switch(config)# interface gigabitEthernet 1/0/11
Switch(config-if)# switchport backup interface gigabitEthernet 1/0/12 multicast
fast-convergence
Switch(config-if)# end
You can verify your setting by entering the show interfaces switchport backup detail privileged EXEC
command.
Switch# show interfaces switchport backup detail
Switch Backup Interface Pairs:
Active Interface
------------------------------------------------------------------------
GigabitEthernet1/0/11
Related Commands Command
show interfaces
switchport backup
OL-9645-10
Backup Interface
GigabitEthernet1/0/12
Preemption Mode : off
Multicast Fast Convergence
Bandwidth : 1000000 Kbit (Gi1/0/11), 1000000 Kbit (Gi1/0/12)
Mac Address Move Update Vlan : auto
Description
[interface-id] Displays the configured Flex Links and their status on the switch or
for the specified interface.
State
Active Up/Backup Standby
: On
Catalyst 3750 Metro Switch Command Reference
switchport backup interface
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