{
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    "abstract": "This document describes a mechanism to ensure layer-2 separation of Local Area Network (LAN) stations accessing an IPv4 gateway over a bridged Ethernet segment. The mechanism - called \"MAC-Forced Forwarding\" - implements an Address Resolution Protocol (ARP) proxy function that prohibits Ethernet Media Access Control (MAC) address resolution between hosts located within the same IPv4 subnet but at different customer premises, and in effect directs all upstream traffic to an IPv4 gateway. The IPv4 gateway provides IP-layer connectivity between these same hosts. This memo provides information for the Internet community.",
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    "authors": [
      {
        "name": "Torben Melsen"
      },
      {
        "name": "Steven Blake"
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      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
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      "source": "parsed",
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      "updated": "2026-10-20T17:28:28.474Z",
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      "confidence": "high",
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      "originalValue": null,
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    "docLabel": "IETF RFC 4562",
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      "confidence": "high",
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      "originalValue": null,
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
      "updated": "2026-10-20T17:28:28.474Z",
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    "docNumber": "4562",
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      "confidence": "high",
      "note": "From the RFC index entry (rfc-index.xml <doc-id>)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
      "updated": "2026-10-20T17:28:28.474Z",
      "version": "extractDocs.js@commit:8277ba975118"
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    "docTitle": "MAC-Forced Forwarding: A Method for Subscriber Separation on an Ethernet Access Network",
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      "confidence": "high",
      "note": "Parsed from RFC index XML title",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
      "updated": "2026-10-20T17:28:28.474Z",
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      "confidence": "high",
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      "originalValue": null,
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      "updated": "2026-10-20T17:28:28.474Z",
      "version": "extractDocs.js@commit:8277ba975118"
    },
    "doi": "10.17487/RFC4562",
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      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
      "updated": "2026-10-20T17:28:28.474Z",
      "version": "extractDocs.js@commit:8277ba975118"
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    "href": "https://doi.org/10.17487/RFC4562",
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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/rfc4562/",
      "updated": "2026-10-20T17:28:28.474Z",
      "version": "extractDocs.js@commit:8277ba975118"
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    "keywords": [
      "Ethernet",
      "Access Network",
      "ARP",
      "DHCP"
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    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
      "updated": "2026-10-20T17:28:28.474Z",
      "version": "extractDocs.js@commit:8277ba975118"
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    "pages": "13",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
      "updated": "2026-10-20T17:28:28.474Z",
      "version": "extractDocs.js@commit:8277ba975118"
    },
    "publicationDate": "2006-06-01",
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      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
      "updated": "2026-10-20T17:28:28.474Z",
      "version": "extractDocs.js@commit:8277ba975118"
    },
    "publisher": "IETF",
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      "confidence": "high",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
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      "version": "extractDocs.js@commit:8277ba975118"
    },
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        "RFC1812",
        "RFC3768",
        "RFC2461",
        "RFC2516",
        "RFC3069",
        "orphan/RFC4562/h:e75851e9",
        "orphan/RFC4562/h:eca8624a"
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      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=15 proseBlocks=18 skippedAnchorBlocks=16",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
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        "source": "parsed",
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        "version": "extractDocs.js@commit:8277ba975118"
      },
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        "RFC792",
        "RFC826",
        "RFC2131",
        "RFC2132",
        "RFC2362",
        "RFC3046",
        "RFC3376",
        "RFC3442"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
        "updated": "2026-10-20T17:28:28.474Z",
        "version": "extractDocs.js@commit:8277ba975118"
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    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc4562/",
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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/rfc4562/",
      "updated": "2026-10-20T17:28:28.474Z",
      "version": "extractDocs.js@commit:8277ba975118"
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
        "updated": "2026-10-20T17:28:28.474Z",
        "version": "extractDocs.js@commit:8277ba975118"
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      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
        "updated": "2026-10-20T17:28:28.474Z",
        "version": "extractDocs.js@commit:8277ba975118"
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      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
        "updated": "2026-10-20T17:28:28.474Z",
        "version": "extractDocs.js@commit:8277ba975118"
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      "statusNote": "Informational",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
        "updated": "2026-10-20T17:28:28.474Z",
        "version": "extractDocs.js@commit:8277ba975118"
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      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc4562/",
        "updated": "2026-10-20T17:28:28.474Z",
        "version": "extractDocs.js@commit:8277ba975118"
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