Multiple choice

Refer to the exhibit. Branch A has a non-Cisco router that is using IETF encapsulation and Branch B has a Cisco router. After the commands that are shown are entered, R1 and R2 fail to establish the PVC. The R2 LMI is Cisco, and the R1 LMI is ANSI. The LMI is successfully established at both locations. Why is the PVC failing?

  1. The PVC to R1 must be point-to-point.

  2. LMI types must match on each end of a PVC.

  3. The frame relay PVCs cannot be established between Cisco and non-Cisco routers.

  4. The IETF parameter is missing from the frame-relay map ip 10.10.10.1 201 command.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When connecting Cisco to non-Cisco routers over Frame Relay, IETF encapsulation must be specified explicitly in the frame-relay map statement on the Cisco side. The default Cisco encapsulation is incompatible with IETF-only peers, causing PVC establishment failure despite successful LMI.

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