P2MP - Inter-Domain LSP

This feature introduces support for RSVP-Traffic Engineering (RSVP-TE) interdomain point-to-multipoint (P2MP) label-switched path (LSP). An interdomain P2MP LSP is a P2MP LSP that has one or more sub-LSPs (branches) that span multiple domains in a network. Examples of such domains include IGP areas and autonomous systems (ASs). A sub-LSP of an interdomain P2MP LSP may be intra-area, interarea, or inter-AS, depending on the location of the egress node (leaf) with respect to the ingress node (source).