R2511-HP MSR Router Series MPLS Configuration Guide(V5)

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Symptom 2
Serial 2/0 and Serial 2/1 are configured with different encapsulation types: one is HDLC and the other
PPP. They each create a Martini VC, with the same VC ID of 1. If you change the encapsulation type of
Serial 2/1 to HDLC, the Martini VC cannot be established.
Analysis
If you change the encapsulation type of Serial 2/1 to HDLC, there are two Martini VCs with the same
encapsulation type of HDLC and the same VC ID of 1. To avoid VC ID conflict, the system automatically
removes the Martini VC on Series 2/1.
Solution
Re-create Martini VCs on Serial 2/0 and Serial 2/1, and configure different VC IDs for the two VCs.