{
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  "docId": "RFC4927",
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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.",
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    "authors": [
      {
        "name": "Jean-Louis Le Roux"
      }
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    "docTitle": "Path Computation Element Communication Protocol (PCECP) Specific Requirements for Inter-Area MPLS and GMPLS Traffic Engineering",
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      "confidence": "high",
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    },
    "doi": "10.17487/RFC4927",
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    "href": "https://doi.org/10.17487/RFC4927",
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      "GMPLS",
      "TE LSP",
      "MPLS-TE",
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      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
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        "Traffic Engineered Label Switched Path",
        "PCE",
        "Path Computation Element"
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      "source": "parsed",
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      "updated": "2026-10-17T00:33:04.921Z",
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      "source": "parsed",
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    },
    "publicationDate": "2007-06-01",
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc4927/",
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        "confidence": "medium",
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        "note": "Parsed from RFC HTML references/informative sections",
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      },
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        "RFC2119",
        "RFC4105",
        "RFC4655",
        "RFC4657"
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        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
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        "source": "parsed",
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        "confidence": "high",
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        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4927/",
        "updated": "2026-10-16T20:42:20.157Z",
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        "confidence": "high",
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        "source": "parsed",
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
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        "source": "resolved",
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        "updated": "2026-10-16T20:42:20.157Z",
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        "source": "parsed",
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        "confidence": "high",
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        "source": "resolved",
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