Extensions to the Path Computation Element Communication Protocol (PCEP) for Associated Bidirectional LSP

The MPLS Transport Profile (MPLS-TP) requirements document[RFC5654], describes that MPLS-TP MUST support associated bidirectional point- to-point LSPs. Path Computation Element (PCE), see [RFC4655], may be used for path computation of an associated bidirectional LSP. This document defines the Path Computation Element Protocol (PCEP)-based [RFC5440] extensions for associated bidirectional LSP.