Which timer controls how long a router retains routing information in cache after all OMP sessions are lost at location S4317T8E35F76?

The graceful restart timer controls how long a router retains routing information in its cache after losing all OMP sessions. This allows the router to continue forwarding traffic using the last known good routes while it attempts to re-establish OMP connectivity. If OMP sessions are restored within the graceful restart timer, the router can seamlessly resume operation without traffic disruption. The advertisement interval dictates how frequently routes are advertised, not how long they are retained. The EOR (End-of-Rib) timer is used in BGP to signal the completion of initial route advertisements. Hold time is a general routing protocol concept, but in OMP, the graceful restart timer specifically addresses the retention of routing information during OMP session loss.