Configuring Ethernet Link Redundancy

To configure Ethernet link redundancy:

1. Specify the Fast Ethernet or Gigabit Ethernet interface on which to configure a redundant link.
   host1(config)#interface gigabitEthernet 1/1
2. For LAG to non-LAG configurations only, specify that LACP is disabled on the port.
   host1(config-if)#no lacp
3. Configure a backup interface and disable LACP on it.
   host1(config)#interface gigabitEthernet 1/0 host1(config-if)#no lacp
4. Configure a LAG interface and assign a member link to the backup interface.
   host1(config)#interface lag myBundle host1(config-if)#member-interface gigabitEthernet 1/0 host1(config-if)#member-interface gigabitEthernet 1/1
5. Do one of the following:
   • Configure link redundancy on the port you specified in step  1.
     host1(config-if)#redundant-port gigabitEthernet 1/1
   • Force the port you specified in step 1 to fail over.
     host1(config-if)#redundant-port gigabitEthernet 1/1 force-failover
6. (Optional) Configure the redundant link to revert back to redundant mode when the failed link becomes active again.
   host1(config-if)#redundant-port gigabitEthernet 1/1 auto-revert

Related Documentation

• Ethernet Link Redundancy Overview
• Ethernet Link Redundancy Behavior Overview
• redundant-port