RFC 7442

This RFC 7442 was published in 2015.

Abstract

When IP multicast trees created by Protocol Independent Multicast - Sparse Mode (PIM-SM) in Any-Source Multicast (ASM) mode need to pass through an MPLS domain, it may be desirable to map such trees to Point-to-Multipoint Label Switched Paths (P2MP LSPs).
This document describes how to accomplish this in the case where such P2MP LSPs are established using Label Distribution Protocol (LDP) Extensions for P2MP and Multipoint-to-Multipoint LSPs: Multipoint LDP (mLDP).

RFC 7442 introduction

[RFC6826] describes how to map Point-to-Multipoint Label Switched Paths (P2MP LSPs) created by mLDP [RFC6388] to multicast trees created by Protocol Independent Multicast - Sparse Mode (PIM-SM) in Source-Specific Multicast (SSM) mode [RFC4607].
This document describes how to map mLDP P2MP trees to multicast trees created by PIM-SM in Any-Source Multicast (ASM) mode.
It describes two possible mechanisms for doing this.

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