Question

A service provider runs RSVP-TE across its core. Two tunnels traverse a link with 100 Mbps of reservable bandwidth. Tunnel-A (already established) reserves 70 Mbps and was configured with setup priority 7 and hold priority 7. Tunnel-B is now being signaled with a 50 Mbps reservation, setup priority 3 and hold priority 3. The link cannot accommodate both reservations simultaneously. What happens when Tunnel-B is signaled?

Accepted Answer

Tunnel-B preempts Tunnel-A because Tunnel-B's setup priority (3) is better than Tunnel-A's hold priority (7), and Tunnel-A is torn down and re-signaled.

Answer

Tunnel-B fails to establish because Tunnel-A was signaled first and holds the reservation regardless of priority values.

Answer

Both tunnels remain up because RSVP-TE oversubscribes the link when priorities differ by more than three levels.

Answer

Tunnel-A preempts Tunnel-B because a hold priority of 7 is stronger than a setup priority of 3.