http://www.rfc-editor.org/rfc/rfc6006.txt
RFC 6006: Extensions to the Path Computation Element Communication Protocol (PCEP) for Point-to-Multipoint Traffic Engineering Label Switched Paths, Q. Zhao, D. King, F. Verhaeghe, T. Takeda, Z. Ali, J. Meuric2010-09-01T23:00:00-00:00This document describes extensions to the PCE communication Protocol (PCEP) to handle requests and responses for the computation of paths for P2MP TE LSPs. [STANDARDS-TRACK]