{
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  "docId": "RFC5227",
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    "abstract": "When two hosts on the same link attempt to use the same IPv4 address at the same time (except in rare special cases where this has been arranged by prior coordination), problems ensue for one or both hosts. This document describes (i) a simple precaution that a host can take in advance to help prevent this misconfiguration from happening, and (ii) if this misconfiguration does occur, a simple mechanism by which a host can passively detect, after the fact, that it has happened, so that the host or administrator may respond to rectify the problem. [STANDARDS-TRACK]",
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    "authors": [
      {
        "name": "Stuart Cheshire"
      }
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      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
      "source": "parsed",
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      "updated": "2026-10-13T22:24:16.747Z",
      "version": "extractDocs.js@commit:fd871efde64d"
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    "docId": "RFC5227",
    "docId$meta": {
      "confidence": "high",
      "note": "Derived from RFC number or Datatracker identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
      "updated": "2026-10-13T22:24:16.747Z",
      "version": "extractDocs.js@commit:fd871efde64d"
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    "docLabel": "IETF RFC 5227",
    "docLabel$meta": {
      "confidence": "high",
      "note": "Constructed from provider and document identifier",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
      "updated": "2026-10-13T22:24:16.747Z",
      "version": "extractDocs.js@commit:fd871efde64d"
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    "docNumber": "5227",
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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/rfc5227/",
      "updated": "2026-10-13T22:24:16.747Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "docTitle": "IPv4 Address Conflict Detection",
    "docTitle$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
      "updated": "2026-10-13T22:24:16.747Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "docType": "Standard",
    "docType$meta": {
      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
      "updated": "2026-10-13T22:24:16.747Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "doi": "10.17487/RFC5227",
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      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
      "updated": "2026-10-13T22:24:16.747Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "href": "https://doi.org/10.17487/RFC5227",
    "href$meta": {
      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
      "updated": "2026-10-13T22:24:16.747Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "pages": "21",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
      "updated": "2026-10-13T22:24:16.747Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "publicationDate": "2008-07-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
      "updated": "2026-10-13T22:24:16.747Z",
      "version": "extractDocs.js@commit:fd871efde64d"
    },
    "publisher": "IETF",
    "publisher$meta": {
      "confidence": "high",
      "note": "Static: provider",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
      "updated": "2026-10-13T22:24:16.747Z",
      "version": "extractDocs.js@commit:fd871efde64d"
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    "references": {
      "bibliographic": [
        "IEEE.STD802.1990",
        "IEEE.STD802.3.1996",
        "IEEE.STD802.5.1998",
        "IEEE.STD802.11.1999",
        "RFC1918",
        "RFC2131",
        "RFC3203",
        "RFC3927",
        "orphan/RFC5227/h:86dc5ca5"
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      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=11 proseBlocks=15 skippedAnchorBlocks=13",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
        "updated": "2026-10-13T22:24:16.747Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
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        "RFC826",
        "RFC2119"
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        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
        "updated": "2026-10-13T22:24:16.747Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc5227/",
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      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
      "updated": "2026-10-13T22:24:16.747Z",
      "version": "extractDocs.js@commit:fd871efde64d"
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      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
        "updated": "2026-10-13T22:24:16.747Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "amends": [
        "RFC826"
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        "confidence": "high",
        "note": "Parsed from RFC index XML",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
        "updated": "2026-10-13T22:24:16.747Z",
        "version": "extractDocs.js@commit:fd871efde64d"
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      "errataExist": false,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
        "updated": "2026-10-13T22:24:16.747Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
        "updated": "2026-10-13T22:24:16.747Z",
        "version": "extractDocs.js@commit:fd871efde64d"
      },
      "statusNote": "Proposed Standard",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
        "updated": "2026-10-13T22:24:16.747Z",
        "version": "extractDocs.js@commit:fd871efde64d"
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      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc5227/",
        "updated": "2026-10-13T22:24:16.747Z",
        "version": "extractDocs.js@commit:fd871efde64d"
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}