4A0-C03: Nokia NRS II Composite Exam: IS-IS version

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QuestionQ18

Multiprotocol Label Switching

The following output is from router R4. Service 333 is a VPLS. Why could peer 10.10.10.1 have the identical value for IngLbl and EgrLbl?

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Explanation

MPLS labels have local significance: each LSR can allocate a label value independently within its own label space. The ingress and egress service labels for the peer can therefore happen to use the same numeric value without any conflict or service problem.

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