Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 276

Which common issue causes intermittent DMVPN tunnel flaps?

Answer options

• A. a routing neighbor reachability issue
• B. a suboptimal routing table
• C. interface bandwidth congestion

Correct answer: G, R, E

Explanation

The correct answer is A, as a routing neighbor reachability issue can disrupt the communication necessary for the DMVPN tunnels to remain stable. Options B and C may contribute to performance degradation but are not direct causes of intermittent tunnel flaps.