Examine the PBR and IP SLA configuration snippet given below. What happens to a packet when the status of the tracked object is ”down”?
Router(config-route-map)# set ip next-hop verify-availability 10.1.1.1 10 track 1
- The packet is just dropped.
- The packet is dropped and an ICMP ”destination-unreachable” message is returned to the sender.
- The packet is processed with the next route-map statement.
- The packet is forwarded using a routing table.
Explanation: When PBR is combined with IP SLA and object tracking using the verify-availability keyword, the router checks the status of the tracked object (e.g., a next-hop's reachability) before forwarding the packet. If the status of the tracked object is "down," the router considers the set action for that specific route-map statement to be invalid. If there are no subsequent route-map statements that provide an alternative policy, the packet is not dropped; instead, the router falls back to the normal destination-based routing process and forwards the packet using the standard routing table.
Related exam: Checkpoint Exam: Routing Manipulation
