VRRP supports tracking BFD session objects and provides tracking for interface state objects.
The VRRP module supports BFD session tracking with configurable priority cost value using object tracking. When a BFD session goes down, VRRP reduces the priority of the configured priority cost value, and the reduced priority value is used for any further advertisements.
If a BFD session is up, the VRRP restores the priority value by adding the priority cost value to the current priority.
In conjunction with VRRP priority decrement using object tracking, priority decrement to value zero is supported. This behavior ensures that VRRP advertises priority zero packets to trigger immediate failover.
