Extensions to the Path Computation Element Communication Protocol (PCEP) for Inter-Layer MPLS and GMPLS Traffic Engineering
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The Path Computation Element (PCE) provides path computation functions
in support of traffic engineering in Multiprotocol Label Switching
(MPLS) and Generalized MPLS (GMPLS) networks. MPLS and GMPLS networks
may be constructed from layered service networks. It is advantageous
for overall network efficiency to provide end-to-end traffic
engineering across multiple network layers through a process called
inter-layer traffic engineering. PCE is a candidate solution for such
requirements. The PCE communication Protocol (PCEP) is designed as a
communication protocol between Path Computation Clients (PCCs) and
PCEs. This document presents PCEP extensions for inter-layer traffic
engineering.