CCIE Routing and Switching (legacy) — Question 21

Which two statements about a flat single-hub DMVPN with NHRP are true? (Choose two.)

Answer options

• A. NHRP shortens the configuration of the hub router.
• B. The spoke routers act as the NHRP servers.
• C. NHRP dynamically provides information about the spoke routers to the hub.
• D. NHRP disables multicast.
• E. The hubrouter uses NHRP to initiate the GRE tunnel with spokes.

Correct answer: C, E

Explanation

Option C is correct because NHRP indeed provides dynamic information about spoke routers to the hub. Option E is also correct as the hub router uses NHRP to establish GRE tunnels with the spoke routers. Options A, B, and D are incorrect as they misrepresent the functionality of NHRP in a DMVPN setup.