{
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    "abstract": "This document describes the framework of the Softwire \"Hub and Spoke\" solution with the Layer Two Tunneling Protocol version 2 (L2TPv2). The implementation details specified in this document should be followed to achieve interoperability among different vendor implementations. [STANDARDS-TRACK]",
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    "authors": [
      {
        "name": "Bill Storer"
      },
      {
        "name": "Carlos Pignataro"
      },
      {
        "name": "Maria Santos"
      },
      {
        "name": "Bruno Stevant"
      },
      {
        "name": "Laurent Toutain"
      },
      {
        "name": "Jean-Francois Tremblay"
      }
    ],
    "authors$meta": {
      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
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      "source": "parsed",
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      "updated": "2026-10-16T20:43:06.292Z",
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      "confidence": "high",
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      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
      "updated": "2026-10-16T20:43:06.292Z",
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    },
    "docLabel": "IETF RFC 5571",
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      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
      "updated": "2026-10-16T20:43:06.292Z",
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    "docNumber": "5571",
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      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
      "updated": "2026-10-16T20:43:06.292Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "docTitle": "Softwire Hub and Spoke Deployment Framework with Layer Two Tunneling Protocol Version 2 (L2TPv2)",
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      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
      "updated": "2026-10-16T20:43:06.292Z",
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    },
    "docType": "Standard",
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      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
      "updated": "2026-10-16T20:43:06.292Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "doi": "10.17487/RFC5571",
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      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
      "updated": "2026-10-16T20:43:06.292Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
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    "href": "https://doi.org/10.17487/RFC5571",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
      "updated": "2026-10-16T20:43:06.292Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
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    "keywords": [
      "Softwire",
      "L2TP",
      "4over6",
      "6over4"
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    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
        "Softwire",
        "L2TP",
        "Softwire Hub and Spoke",
        "Softwire HnS",
        "4over6",
        "6over4",
        "L2TP Softwires",
        "L2TPv2 Softwires"
      ],
      "overridden": true,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
      "updated": "2026-10-17T00:33:53.164Z",
      "version": "extractDocs.js@commit:e15f05a0bdbb"
    },
    "pages": "41",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
      "updated": "2026-10-16T20:43:06.292Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "publicationDate": "2009-06-01",
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      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
      "updated": "2026-10-16T20:43:06.292Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "publisher": "IETF",
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      "confidence": "high",
      "note": "Static: provider",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
      "updated": "2026-10-16T20:43:06.292Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
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        "RFC1471",
        "RFC1473",
        "RFC1877",
        "RFC2131",
        "RFC2132",
        "RFC2433",
        "RFC2867",
        "RFC2868",
        "RFC3022",
        "RFC3575",
        "RFC3646",
        "RFC3748",
        "RFC3931",
        "RFC4087",
        "RFC4193",
        "RFC4293",
        "RFC4623",
        "RFC4787",
        "RFC4861",
        "RFC4925",
        "RFC4941",
        "RFC5080",
        "RFC5405",
        "orphan/RFC5571/h:118736f1",
        "orphan/RFC5571/h:4f673d32",
        "orphan/RFC5571/h:c339b260",
        "orphan/RFC5571/h:e285c43d"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=45 proseBlocks=51 skippedAnchorBlocks=48",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
        "updated": "2026-10-16T20:43:06.292Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
      "normative": [
        "RFC1332",
        "RFC1661",
        "RFC1918",
        "RFC1994",
        "RFC2119",
        "RFC2661",
        "RFC2865",
        "RFC3162",
        "RFC3193",
        "RFC3315",
        "RFC3371",
        "RFC3633",
        "RFC3736",
        "RFC3947",
        "RFC3948",
        "RFC4818",
        "RFC4862",
        "RFC5072"
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      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
        "updated": "2026-10-16T20:43:06.292Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc5571/",
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      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
      "updated": "2026-10-16T20:43:06.292Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
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      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
        "updated": "2026-10-16T20:43:06.292Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
      "errataExist": false,
      "errataExist$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/rfc5571/",
        "updated": "2026-10-16T20:43:06.292Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
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      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
        "updated": "2026-10-16T20:43:06.292Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
      "statusNote": "Proposed Standard",
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        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
        "updated": "2026-10-16T20:43:06.292Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
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      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5571/",
        "updated": "2026-10-16T20:43:06.292Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
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