QuestionQ22

Layer 2 VPNs

What tool identifies the failure point in a P2MP LSP from the ingress LSR?

  • A Jitter TLV
  • B SPAN
  • C P2MP traceroute
  • D P2MP ping
Explanation

P2MP traceroute performs hop-by-hop tracing of the point-to-multipoint LSP from the ingress LSR, isolating the location of a data-plane fault. P2MP ping validates LSP reachability but does not identify the failed hop.

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