What is the priority delta in Monitored circuit VRRP?

The concept of priority delta in the context of Virtual Router Redundancy Protocol (VRRP) is integral to its operation for managing redundancy and failover scenarios. In VRRP, routers are assigned priorities that determine which one will assume the role of the master router. The priority delta specifically refers to a value that is subtracted from the current priority when a failure occurs on an interface.

When an interface fails, the current router can adjust its priority by decreasing it by the value of the priority delta. This reduction in priority can then enable another router in the VRRP group with a higher adjusted priority to take over as the master if its priority exceeds the newly adjusted priority of the failing router. This mechanism helps ensure that a backup router can step in seamlessly and maintain network availability without resulting in a prolonged outage.

In this way, the priority delta is crucial for defining how priority changes occur in response to failures, effectively enabling dynamic management of router priorities within the VRRP framework.