http://www.rfc-editor.org/rfc/rfc4875.txt
RFC 4875: Extensions to Resource Reservation Protocol - Traffic Engineering (RSVP-TE) for Point-to-Multipoint TE Label Switched Paths (LSPs), R. Aggarwal, D. Papadimitriou, S. Yasukawa2007-05-01T23:00:00-00:00There can be various applications for P2MP TE LSPs such as IP multicast. Specification of how such applications will use a P2MP TE LSP is outside the scope of this document. [STANDARDS-TRACK]