VRRP with Higher Priority Running as Backup

The VRRP router with the higher priority can display as the backup for the following reasons

  • Hold-down timer is running.

  • The configured Critical IP is not reachable or does not exist.

If the critical-IP is configured for VRRP master, and the critical interface goes down or is deleted, the master transitions to the backup state. In this case, the log shows the transition cause as 1 like many other cases.

If the holddown timer is configured for VRRP master, the holddown timer delays the preemption, giving the device, which is becoming the master enough time to construct routing tables.

Procedure

  1. To determine that the issue is with the critical interface, look for the following trace message.

    tMainTask RCIP6: rcip6_vrrp.c: 5152: VRF name: GlobalRouter (VRF id 0): ipv6VrrpTic: Becoming backup for Vrid 200 on IfIndex 2052 because of invalid critical IP

  2. If the holddown Timer is configured for VRRP master, the holddown timer delays the preemption, giving the device, which is becoming the master enough time to construct routing tables.

    tMainTask RCIP6: rcip6_vrrp.c: Enter in HoldDown processing,Vrid 200 LastRecvd 0 MasterDown 3, Holddown time remaining 970, Holddownstate 2

9037147-00 Rev AB