{
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  "docId": "RFC6673",
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    "abstract": "Many user applications (and the transport protocols that make them possible) require two-way communications. To assess this capability, and to achieve test system simplicity, round-trip loss measurements are frequently conducted in practice. The Two-Way Active Measurement Protocol specified in RFC 5357 establishes a round-trip loss measurement capability for the Internet. However, there is currently no round-trip packet loss metric specified according to the RFC 2330 framework. This memo adds round-trip loss to the set of IP Performance Metrics (IPPM). [STANDARDS-TRACK]",
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    "authors": [
      {
        "name": "Al Morton"
      }
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      "confidence": "high",
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      "originalValue": null,
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      "updated": "2026-10-16T20:44:36.844Z",
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    "docId": "RFC6673",
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      "confidence": "high",
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      "originalValue": null,
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      "confidence": "high",
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      "source": "resolved",
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      "updated": "2026-10-16T20:44:36.844Z",
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    "docNumber": "6673",
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      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
      "originalValue": null,
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
      "updated": "2026-10-16T20:44:36.844Z",
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    },
    "docTitle": "Round-Trip Packet Loss Metrics",
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      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
      "updated": "2026-10-16T20:44:36.844Z",
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    "docType": "Standard",
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      "confidence": "high",
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      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
      "updated": "2026-10-16T20:44:36.844Z",
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    },
    "doi": "10.17487/RFC6673",
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      "confidence": "high",
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      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
      "updated": "2026-10-16T20:44:36.844Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
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    "href": "https://doi.org/10.17487/RFC6673",
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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/rfc6673/",
      "updated": "2026-10-16T20:44:36.844Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "keywords": [
      "IP",
      "IPPM"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
      "updated": "2026-10-16T20:44:36.844Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "pages": "14",
    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
      "updated": "2026-10-16T20:44:36.844Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
    },
    "publicationDate": "2012-08-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
      "updated": "2026-10-16T20:44:36.844Z",
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    },
    "publisher": "IETF",
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      "confidence": "high",
      "note": "Static: provider",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
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    },
    "references": {
      "bibliographic": [
        "RFC5481",
        "RFC6248",
        "RFC6703"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=15 proseBlocks=15 skippedAnchorBlocks=13",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
        "updated": "2026-10-16T20:44:36.844Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
      "normative": [
        "RFC2119",
        "RFC2330",
        "RFC2679",
        "RFC2680",
        "RFC2681",
        "RFC3393",
        "RFC3432",
        "RFC4737",
        "RFC5357"
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      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
        "updated": "2026-10-16T20:44:36.844Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      }
    },
    "resolvedHref": "https://www.rfc-editor.org/info/rfc6673/",
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      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
      "updated": "2026-10-16T20:44:36.844Z",
      "version": "extractDocs.js@commit:2c3b1db1b97b"
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    "status": {
      "active": true,
      "active$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
        "updated": "2026-10-16T20:44:36.844Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
      "errataExist": false,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
        "updated": "2026-10-16T20:44:36.844Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6673/",
        "updated": "2026-10-16T20:44:36.844Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
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      "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/rfc6673/",
        "updated": "2026-10-16T20:44:36.844Z",
        "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/rfc6673/",
        "updated": "2026-10-16T20:44:36.844Z",
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