What does the output verify?

Refer to the Exhibit.

A network engineer configures a new GRE tunnel and enters the show run command.

What does the output verify?
A . The tunnel will be established and work as expected
B . The tunnel destination will be known via the tunnel interface
C . The tunnel keepalive is configured incorrectly because they must match on both sites
D . The default MTU of the tunnel interface is 1500 byte.

View Answer

Answer: C

Explanation:

The output verifies that the tunnel keepalive is configured incorrectly because they must match on both sites. In the provided configuration, Site A has a keepalive of 5 seconds while Site B has a keepalive of 6 seconds. For GRE tunnels to establish and maintain connectivity, the keepalive settings should be identical on both ends of the tunnel to ensure that both sides can detect if the tunnel becomes unreachable.

References: Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) study guide or course materials available on Cisco’s official website.