RFC 4927

Path Computation Element Communication Protocol (PCECP) Specific Requirements for Inter-Area MPLS and GMPLS Traffic Engineering, June 2007

Canonical URL:
https://www.rfc-editor.org/rfc/rfc4927.txt
File formats:
Plain TextPDF
Status:
INFORMATIONAL
Author:
J.-L. Le Roux, Ed.
Stream:
IETF
Source:
pce (rtg)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC4927

Discuss this RFC: Send questions or comments to pce@ietf.org

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Abstract

For scalability purposes, a network may comprise multiple Interior Gateway Protocol (IGP) areas. An inter-area Traffic Engineered Label Switched Path (TE-LSP) is an LSP that transits through at least two IGP areas. In a multi-area network, topology visibility remains local to a given area, and a head-end Label Switching Router (LSR) cannot compute an inter-area shortest constrained path. One key application of the Path Computation Element (PCE)-based architecture is the computation of inter-area TE-LSP paths. The PCE Communication Protocol (PCECP) is used to communicate computation requests from Path Computation Clients (PCCs) to PCEs, and to return computed paths in responses. This document lists a detailed set of PCECP-specific requirements for support of inter-area TE-LSP path computation. It complements the generic requirements for a PCE Communication Protocol. This memo provides information for the Internet community.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


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