Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 222

What are the two prerequisites of setting up DMVPN tunnel? (Choose two.)

Answer options

• A. Before a multipoint GRE (mGRE) and IPsec tunnel can be established, define an Internet Key Exchange (IKE) policy by using the crypto isakmp policy command.
• B. The Public IP’s of the routers should be able to ping each other.
• C. To enable 2547oDMPVN - Traffic Segmentation Within DMVPN configure multiprotocol label switching (MPLS) by using the mpls ip command
• D. It is mandatory to use wildcard preshared keys to build the DMVPN tunnel
• E. DMVPN can work on all OEM devices that support IKE.

Correct answer: A, C

Explanation

The correct answers are A and C because defining an IKE policy and configuring MPLS are essential prerequisites for establishing a DMVPN tunnel. Option B, while important for connectivity, is not a prerequisite for the tunnel itself. Options D and E are incorrect as they do not represent required conditions for DMVPN setup.