{
  "draft": "draft-ietf-pce-pcecp-interarea-reqs-05",
  "doc_id": "RFC4927",
  "title": "Path Computation Element Communication Protocol (PCECP) Specific Requirements for Inter-Area MPLS and GMPLS Traffic Engineering",
  "authors": [
    "J.-L. Le Roux, Ed."
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "12",
  "pub_status": "INFORMATIONAL",
  "status": "INFORMATIONAL",
  "source": "Path Computation Element",
  "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.",
  "pub_date": "June 2007",
  "keywords": [
    "gmpls",
    "te-lsp",
    "traffic engineered label switched path",
    "pce",
    "path computation element"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC4927",
  "errata_url": null
}