Dell PowerConnect 7048P User Manual - Page 1024

With standard VRRP, the backup router takes over only if the router goes down. With VRRP interface tracking, if a tracked interface goes down on the VRRP master, the priority decrement value is subtracted from the router priority. If the master router priority becomes less than the priority on the backup router, the backup router takes over. If the tracked interface becomes up, the value of the priority decrement is added to the current router priority. If the resulting priority is more than the backup router priority, the original VRRP master resumes control. VRRP route tracking monitors the reachability of an IP route. A tracked route is considered up when a routing table entry exists for the route and the route is accessible. When the tracked route is removed from the routing table, the priority of the VRRP router will be reduced by the priority decrement value. When the tracked route is added to the routing table, the priority will be incremented by the same. 1024 Configuring VRRP