{
  "$schema": "/api/schemas/documents.schema.json",
  "apiVersion": "1.1.0",
  "lastModified": "2026-10-16T18:55:07.047Z",
  "sourcePath": "src/main/data/docs",
  "docId": "RFC5443",
  "document": {
    "abstract": "In certain networks, there is dependency on the edge-to-edge Label Switched Paths (LSPs) setup by the Label Distribution Protocol (LDP), e.g., networks that are used for Multiprotocol Label Switching (MPLS) Virtual Private Network (VPN) applications. For such applications, it is not possible to rely on Internet Protocol (IP) forwarding if the MPLS LSP is not operating appropriately. Blackholing of labeled traffic can occur in situations where the Interior Gateway Protocol (IGP) is operational on a link on which LDP is not. While the link could still be used for IP forwarding, it is not useful for MPLS forwarding, for example, MPLS VPN applications or Border Gateway Protocol (BGP) route-free cores. This document describes a mechanism to avoid traffic loss due to this condition without introducing any protocol changes. This memo provides information for the Internet community.",
    "abstract$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML abstract",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "authors": [
      {
        "name": "Markus Jork"
      },
      {
        "name": "Alia Atlas"
      },
      {
        "name": "Luyuan Fang"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docId": "RFC5443",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docLabel": "IETF RFC 5443",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docNumber": "5443",
    "docNumber$meta": {
      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docTitle": "LDP IGP Synchronization",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docType": "Informational",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "doi": "10.17487/RFC5443",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "href": "https://doi.org/10.17487/RFC5443",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "keywords": [
      "LDP",
      "IGP"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "pages": "7",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "publicationDate": "2009-03-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "references": {
      "bibliographic": [
        "ISO.10589.1992",
        "RFC3137",
        "RFC5305",
        "orphan/RFC5443/h:806e0514",
        "orphan/RFC5443/h:0f765937",
        "orphan/RFC5443/h:a5e3af55"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=9 proseBlocks=11 skippedAnchorBlocks=9",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
        "updated": "2026-10-16T18:55:07.047Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "normative": [
        "RFC2119",
        "RFC2328",
        "RFC5036"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
        "updated": "2026-10-16T18:55:07.047Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc5443/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
      "updated": "2026-10-16T18:55:07.047Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
        "updated": "2026-10-16T18:55:07.047Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "amendedBy": [
        "RFC6138",
        "RFC10041"
      ],
      "amendedBy$meta": {
        "confidence": "high",
        "note": "Parsed from RFC index XML",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
        "updated": "2026-10-16T18:55:07.047Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "errataExist": false,
      "errataExist$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/rfc5443/",
        "updated": "2026-10-16T18:55:07.047Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
        "updated": "2026-10-16T18:55:07.047Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "statusNote": "Informational",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
        "updated": "2026-10-16T18:55:07.047Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5443/",
        "updated": "2026-10-16T18:55:07.047Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      }
    }
  }
}