{
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  "lastModified": "2026-10-13T17:53:03.386Z",
  "sourcePath": "src/main/data/docs",
  "docId": "RFC4577",
  "document": {
    "abstract": "Many Service Providers offer Virtual Private Network (VPN) services to their customers, using a technique in which customer edge routers (CE routers) are routing peers of provider edge routers (PE routers). The Border Gateway Protocol (BGP) is used to distribute the customer's routes across the provider's IP backbone network, and Multiprotocol Label Switching (MPLS) is used to tunnel customer packets across the provider's backbone. This is known as a \"BGP/MPLS IP VPN\". The base specification for BGP/MPLS IP VPNs presumes that the routing protocol on the interface between a PE router and a CE router is BGP. This document extends that specification by allowing the routing protocol on the PE/CE interface to be the Open Shortest Path First (OSPF) protocol. This document updates RFC 4364. [STANDARDS-TRACK]",
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      "confidence": "high",
      "note": "Parsed from RFC index XML abstract",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:23:23.633Z",
      "version": "extractDocs.js@commit:996495349225"
    },
    "authors": [
      {
        "name": "Eric C. Rosen"
      },
      {
        "name": "Peter Psenak"
      },
      {
        "name": "Padma Pillay-Esnault"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:23:23.633Z",
      "version": "extractDocs.js@commit:996495349225"
    },
    "docId": "RFC4577",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:23:23.633Z",
      "version": "extractDocs.js@commit:996495349225"
    },
    "docLabel": "IETF RFC 4577",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:23:23.633Z",
      "version": "extractDocs.js@commit:996495349225"
    },
    "docNumber": "4577",
    "docNumber$meta": {
      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:23:23.633Z",
      "version": "extractDocs.js@commit:996495349225"
    },
    "docTitle": "OSPF as the Provider/Customer Edge Protocol for BGP/MPLS IP Virtual Private Networks (VPNs)",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:23:23.633Z",
      "version": "extractDocs.js@commit:996495349225"
    },
    "docType": "Standard",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:23:23.633Z",
      "version": "extractDocs.js@commit:996495349225"
    },
    "doi": "10.17487/RFC4577",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:23:23.633Z",
      "version": "extractDocs.js@commit:996495349225"
    },
    "href": "https://doi.org/10.17487/RFC4577",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:23:23.633Z",
      "version": "extractDocs.js@commit:996495349225"
    },
    "keywords": [
      "Ce",
      "OSPF",
      "MPLS",
      "CE Router"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
        "Ce",
        "OSPF",
        "MPLS"
      ],
      "overridden": true,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:53:03.386Z",
      "version": "extractDocs.js@commit:25936397c06b"
    },
    "pages": "25",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:23:23.633Z",
      "version": "extractDocs.js@commit:996495349225"
    },
    "publicationDate": "2006-06-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:23:23.633Z",
      "version": "extractDocs.js@commit:996495349225"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:23:23.633Z",
      "version": "extractDocs.js@commit:996495349225"
    },
    "references": {
      "bibliographic": [
        "RFC4271",
        "RFC2453",
        "RFC4365"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=10 proseBlocks=11 skippedAnchorBlocks=9",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
        "updated": "2026-10-13T17:23:23.633Z",
        "version": "extractDocs.js@commit:996495349225"
      },
      "normative": [
        "RFC4360",
        "RFC2328",
        "RFC4576",
        "RFC2119",
        "RFC4364"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
        "updated": "2026-10-13T17:23:23.633Z",
        "version": "extractDocs.js@commit:996495349225"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc4577/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
      "updated": "2026-10-13T17:23:23.633Z",
      "version": "extractDocs.js@commit:996495349225"
    },
    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
        "updated": "2026-10-13T17:23:23.633Z",
        "version": "extractDocs.js@commit:996495349225"
      },
      "amends": [
        "RFC4364"
      ],
      "amends$meta": {
        "confidence": "high",
        "note": "Parsed from RFC index XML",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
        "updated": "2026-10-13T17:23:23.633Z",
        "version": "extractDocs.js@commit:996495349225"
      },
      "errataExist": true,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
        "updated": "2026-10-13T17:23:23.633Z",
        "version": "extractDocs.js@commit:996495349225"
      },
      "errataUrl": [
        "https://www.rfc-editor.org/errata/rfc4577",
        "https://www.rfc-editor.org/errata_search.php?rfc=4577",
        "https://www.rfc-editor.org/rfc/inline-errata/rfc4577.html"
      ],
      "errataUrl$meta": {
        "confidence": "high",
        "note": "Parsed from errata links on RFC/Datatracker pages",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
        "updated": "2026-10-13T17:23:23.633Z",
        "version": "extractDocs.js@commit:996495349225"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
        "updated": "2026-10-13T17:23:23.633Z",
        "version": "extractDocs.js@commit:996495349225"
      },
      "statusNote": "Proposed Standard",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
        "updated": "2026-10-13T17:23:23.633Z",
        "version": "extractDocs.js@commit:996495349225"
      },
      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4577/",
        "updated": "2026-10-13T17:23:23.633Z",
        "version": "extractDocs.js@commit:996495349225"
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}