{
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    "abstract": "The BGP Encapsulation Subsequent Address Family Identifier (SAFI) provides a method for the dynamic exchange of encapsulation information and for the indication of encapsulation protocol types to be used for different next hops. Currently, support for Generic Routing Encapsulation (GRE), Layer 2 Tunneling Protocol (L2TPv3), and IP in IP tunnel types are defined. This document defines support for IPsec tunnel types. [STANDARDS-TRACK]",
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      "confidence": "high",
      "note": "Parsed from RFC index XML abstract",
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T18:55:33.818Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "authors": [
      {
        "name": "Lou Berger"
      },
      {
        "name": "Russ White"
      },
      {
        "name": "Eric C. Rosen"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T18:55:33.818Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docId": "RFC5566",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T18:55:33.818Z",
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    },
    "docLabel": "IETF RFC 5566",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T18:55:33.818Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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    "docNumber": "5566",
    "docNumber$meta": {
      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T18:55:33.818Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docTitle": "BGP IPsec Tunnel Encapsulation Attribute",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T18:55:33.818Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "docType": "Standard",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T18:55:33.818Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "doi": "10.17487/RFC5566",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T18:55:33.818Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "href": "https://doi.org/10.17487/RFC5566",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T18:55:33.818Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "keywords": [
      "BGP",
      "SAFI"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
        "BGP",
        "Safi",
        "Subsequent Address Family Identifier"
      ],
      "overridden": true,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T19:29:43.057Z",
      "version": "extractDocs.js@commit:75b379398159"
    },
    "pages": "8",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T18:55:33.818Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "publicationDate": "2009-06-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T18:55:33.818Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T18:55:33.818Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
    },
    "references": {
      "bibliographic": [
        "RFC2003",
        "RFC2385",
        "RFC2784",
        "RFC3931",
        "RFC4023",
        "RFC4272",
        "RFC4364",
        "RFC4659",
        "RFC4798",
        "RFC5549",
        "RFC5565"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=18 proseBlocks=21 skippedAnchorBlocks=19",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
        "updated": "2026-10-16T18:55:33.818Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "normative": [
        "RFC2119",
        "RFC4271",
        "RFC4301",
        "RFC4302",
        "RFC4303",
        "RFC4306",
        "RFC5512"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
        "updated": "2026-10-16T18:55:33.818Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc5566/",
    "resolvedHref$meta": {
      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
      "updated": "2026-10-16T18:55:33.818Z",
      "version": "extractDocs.js@commit:a6ae1efef02e"
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    "status": {
      "active": false,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
        "updated": "2026-10-16T18:55:33.818Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "errataExist": false,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
        "updated": "2026-10-16T18:55:33.818Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "latestVersion": false,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
        "updated": "2026-10-16T18:55:33.818Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "statusNote": "Proposed Standard",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
        "updated": "2026-10-16T18:55:33.818Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "superseded": true,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
        "updated": "2026-10-16T18:55:33.818Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
      },
      "supersededBy": [
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      ],
      "supersededBy$meta": {
        "confidence": "high",
        "note": "Parsed from RFC index XML",
        "originalValue": [],
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5566/",
        "updated": "2026-10-16T18:55:33.818Z",
        "version": "extractDocs.js@commit:a6ae1efef02e"
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