P2MP LSP Setup using PIM-SSM and LDP
Alcatel
Alcatel
There is emerging interest in the use of MPLS LSPs for the delivery of multicast traffic. Efficient delivery of multicast traffic using MPLS requires P2MP LSPs. This document describes a mechanism to setup P2MP LSPs using PIM-SSM and LDP. PIM-SSM is a widely deployed multicast routing protocol and has well defined procedures for signalling multicast traffic. LDP is a well defined mechanism for distribution of MPLS labels. Utilizing both PIM-SSM and LDP for setting up P2MP LSPs keeps the clear separation between signalling and label distribution, and minimizes changes to both protocols. PIM-SSM signals when to receive multicast traffic and LDP distributes label information regarding how to receive multicast traffic.