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Problem Statement Recent proposals have extended the scope of MPLS TE LSPs to encompass P2MP TE LSPs. There is a requirement for simple and efficient mechanisms to detect data plane failures in P2MP MPLS LSPs. Requirements include: Verification of reception at recipients. Discovering point-to-multipoint tree topology. Ping/Trace from ingress/egress. Whole tree (source-to-recipient) Individual recipients Issues to overcome include: Tracing in a tree context. Ping/Trace from receiver to source may not be viable. Scalability. |