Implementing Cisco Service Provider VPN Services (SPVI) — Question 12

While troubleshooting an AToM L2VPN service, a network consultant notices that the AC Layer 2 encapsulations are different. Which action should the consultant take in order to make the MPLS L2VPN work?

Answer options

• A. tag-rewrite on the ingress and egress PE router
• B. interworking IP configuration on the last PE router before label disposition
• C. nonrouted interworking setup to properly translate only the Layer 2 information from the AC
• D. interworking IP configuration on both the AC terminations on the PEs

Correct answer: D

Explanation

The correct answer is D because configuring interworking IP on both AC terminations ensures that the encapsulations are compatible, allowing for proper communication. Options A and C do not address the encapsulation differences directly, while option B only focuses on the last PE router, which may not resolve the issue across both terminations.