{
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    "abstract": "This document defines OSPF-xTE, an experimental traffic engineering (TE) extension to the link-state routing protocol OSPF. OSPF-xTE defines new TE Link State Advertisements (LSAs) to disseminate TE metrics within an autonomous System (AS), which may consist of multiple areas. When an AS consists of TE and non-TE nodes, OSPF-xTE ensures that non-TE nodes in the AS are unaffected by the TE LSAs. OSPF-xTE generates a stand-alone TE Link State Database (TE-LSDB), distinct from the native OSPF LSDB, for computation of TE circuit paths. OSPF-xTE is versatile and extendible to non-packet networks such as Synchronous Optical Network (SONET) / Time Division Multiplexing (TDM) and optical networks. This memo defines an Experimental Protocol for the Internet community.",
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    "authors": [
      {
        "name": "Pyda Srisuresh"
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      {
        "name": "Paul Joseph"
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      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
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      "confidence": "high",
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      "originalValue": null,
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      "confidence": "high",
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    "docNumber": "4973",
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      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
      "updated": "2026-10-16T18:53:36.712Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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    "docTitle": "OSPF-xTE: Experimental Extension to OSPF for Traffic Engineering",
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      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
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      "updated": "2026-10-16T18:53:36.712Z",
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      "note": "Mapped from Datatracker std_level or RFC status text",
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      "source": "parsed",
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      "updated": "2026-10-16T18:53:36.712Z",
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    },
    "doi": "10.17487/RFC4973",
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      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
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      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
      "updated": "2026-10-16T18:53:36.712Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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    "href": "https://doi.org/10.17487/RFC4973",
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      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
      "updated": "2026-10-16T18:53:36.712Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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    "keywords": [
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      "LSA"
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    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
        "Ospf-te",
        "LSA"
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
      "updated": "2026-10-16T19:27:44.454Z",
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    "pages": "50",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
      "updated": "2026-10-16T18:53:36.712Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "publicationDate": "2007-07-01",
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      "confidence": "high",
      "note": "Parsed from RFC index XML date",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
      "updated": "2026-10-16T18:53:36.712Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
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      "confidence": "high",
      "note": "Static: provider",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
      "updated": "2026-10-16T18:53:36.712Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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        "RFC3212",
        "RFC3471",
        "RFC1584",
        "RFC3101",
        "RFC2370",
        "RFC3630",
        "RFC3209",
        "orphan/RFC4973/h:82b0fab0",
        "orphan/RFC4973/h:ab0ca0ec"
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      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=18 proseBlocks=19 skippedAnchorBlocks=16",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
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        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
        "updated": "2026-10-16T18:53:36.713Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "normative": [
        "RFC3031",
        "RFC2702",
        "RFC2328",
        "RFC2154",
        "RFC4970",
        "RFC2434"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
        "updated": "2026-10-16T18:53:36.713Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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    "resolvedHref": "https://www.rfc-editor.org/info/rfc4973/",
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      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
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      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
      "updated": "2026-10-16T18:53:36.712Z",
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
        "updated": "2026-10-16T18:53:36.712Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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      "errataExist": false,
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        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
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        "updated": "2026-10-16T18:53:36.713Z",
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      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
        "updated": "2026-10-16T18:53:36.712Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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      "statusNote": "Experimental",
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        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
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        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
        "updated": "2026-10-16T18:53:36.713Z",
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      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4973/",
        "updated": "2026-10-16T18:53:36.712Z",
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