Disabling VRRP backup preemption
VRRP backup preemption can be disabled to avoid route flapping when a backup VRRP device that is acting as the master device could be preempted by another backup device with a higher priority value.
A VRRP or VRRP-E session must be globally enabled using the router vrrp or router vrrp-extended command in global configuration mode.
Preemption is enabled by default for VRRP and VRRP-E, but if several devices come back online with higher priorities than the original backup device, route flapping can occur as these devices preempt each other. The following steps can be used when you want to avoid a backup device acting as the master from being preempted by another backup device with a higher priority value.
The following example disables preemption on a backup VRRP device.
device(config)# router vrrp device(config)# interface ethernet 1/1/5 device(config-if-e1000-1/1/5)# ip address 10.53.5.3/24 device(config-if-e1000-1/1/5)# ip vrrp vrid 1 device(config-if-e1000-1/1/5-vrid-1)# non-preempt-mode