What is the default TTL value in a VRRP advertisement?

In VRRP (Virtual Router Redundancy Protocol), the default Time to Live (TTL) value for advertisement messages is set to 255. This indicates that the VRRP advertisements can traverse multiple networks before being discarded. TTL is a mechanism used to prevent packets from circulating indefinitely in case of routing loops. By having a TTL value of 255, the VRRP advertisements can be received by devices on the same local segment or by those upstream, as they can effectively reach multiple hops without being dropped.

Choosing this default value allows network devices to participate in routing redundancy efficiently, ensuring quick failover should the primary router fail. This is especially important in scenarios where multiple routers are configured to manage the same virtual IP address, and timely communication between them is crucial for maintaining network availability and reliability.