{
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  "docId": "RFC6327",
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    "abstract": "The IETF TRILL (TRansparent Interconnection of Lots of Links) protocol provides optimal pair-wise data forwarding without configuration, safe forwarding even during periods of temporary loops, and support for multipathing of both unicast and multicast traffic. TRILL accomplishes this by using IS-IS (Intermediate System to Intermediate System) link state routing and by encapsulating traffic using a header that includes a hop count. Devices that implement TRILL are called Routing Bridges (RBridges). TRILL supports multi-access LAN (Local Area Network) links that can have multiple end stations and RBridges attached. This document describes four aspects of the TRILL LAN Hello protocol used on such links, particularly adjacency, designated RBridge selection, and MTU (Maximum Transmission Unit) and pseudonode procedures, with state machines. There is no change for IS-IS point-to-point Hellos used on links configured as point-to-point in TRILL. [STANDARDS-TRACK]",
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
      "updated": "2026-10-20T09:42:29.011Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "authors": [
      {
        "name": "Donald E. Eastlake 3rd"
      },
      {
        "name": "Radia Perlman"
      },
      {
        "name": "Anoop Ghanwani"
      },
      {
        "name": "Dinesh G. Dutt"
      },
      {
        "name": "Vishwas Manral"
      }
    ],
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      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
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      "updated": "2026-10-20T09:42:29.011Z",
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    },
    "docId": "RFC6327",
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      "confidence": "high",
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      "originalValue": null,
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
      "updated": "2026-10-20T09:42:29.010Z",
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    "docLabel": "IETF RFC 6327",
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      "confidence": "high",
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      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
      "updated": "2026-10-20T09:42:29.010Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "docNumber": "6327",
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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/rfc6327/",
      "updated": "2026-10-20T16:06:34.744Z",
      "version": "extractDocs.js@commit:cc2368606b5f"
    },
    "docTitle": "Routing Bridges (RBridges): Adjacency",
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      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
      "updated": "2026-10-20T09:42:29.010Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "docType": "Standard",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
      "updated": "2026-10-20T09:42:29.011Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "doi": "10.17487/RFC6327",
    "doi$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
      "updated": "2026-10-20T09:42:29.011Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
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    "href": "https://doi.org/10.17487/RFC6327",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
      "updated": "2026-10-20T09:42:29.011Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "keywords": [
      "TRILL",
      "Adjacency"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
        "RBridge",
        "TRILL",
        "Adjacency"
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      "overridden": true,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
      "updated": "2026-10-20T16:06:34.744Z",
      "version": "extractDocs.js@commit:cc2368606b5f"
    },
    "pages": "26",
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      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
      "updated": "2026-10-20T09:42:29.011Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "publicationDate": "2011-07-01",
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      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
      "updated": "2026-10-20T09:42:29.011Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
      "updated": "2026-10-20T09:42:29.011Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "references": {
      "bibliographic": [
        "IEEE.STD802.1AX.2008",
        "IEEE.STD802.1Q.2005",
        "RFC3719",
        "RFC5880",
        "orphan/RFC6327/h:4d5b939a"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=11 proseBlocks=13 skippedAnchorBlocks=11",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
        "updated": "2026-10-20T09:42:29.011Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
      },
      "normative": [
        "ISO.10589.2002",
        "RFC1195",
        "RFC2119",
        "RFC6325",
        "RFC6326"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
        "updated": "2026-10-20T09:42:29.011Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc6327/",
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      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
      "updated": "2026-10-20T09:42:29.011Z",
      "version": "extractDocs.js@commit:6ff5f1bb34e3"
    },
    "status": {
      "active": false,
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
        "updated": "2026-10-20T09:42:29.011Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
      },
      "amendedBy": [
        "RFC7180"
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      "amendedBy$meta": {
        "confidence": "high",
        "note": "Parsed from RFC index XML",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
        "updated": "2026-10-20T09:42:29.011Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
      },
      "amends": [
        "RFC6325"
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      "amends$meta": {
        "confidence": "high",
        "note": "Parsed from RFC index XML",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
        "updated": "2026-10-20T09:42:29.011Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
      },
      "errataExist": false,
      "errataExist$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/rfc6327/",
        "updated": "2026-10-20T09:42:29.011Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
      },
      "latestVersion": false,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
        "updated": "2026-10-20T09:42:29.011Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
      },
      "statusNote": "Proposed Standard",
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        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
        "updated": "2026-10-20T09:42:29.011Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
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      "superseded": true,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6327/",
        "updated": "2026-10-20T09:42:29.011Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
      },
      "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/rfc6327/",
        "updated": "2026-10-20T09:42:29.011Z",
        "version": "extractDocs.js@commit:6ff5f1bb34e3"
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}