{
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    "abstract": "Pre-Congestion Notification (PCN) is a means for protecting the quality of service for inelastic traffic admitted to a Diffserv domain. The overall PCN architecture is described in RFC 5559. This memo is one of a series describing possible boundary-node behaviors for a PCN-domain. The behavior described here is that for a form of measurement-based load control using three PCN marking states: not- marked, threshold-marked, and excess-traffic-marked. This behavior is known informally as the Controlled Load (CL) PCN-boundary-node behavior. This document defines an Experimental Protocol for the Internet community.",
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    "authors": [
      {
        "name": "Anna Charny"
      },
      {
        "name": "Fortune Huang"
      },
      {
        "name": "Georgios Karagiannis"
      },
      {
        "name": "Michael Menth"
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      {
        "name": "Tom Taylor"
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    "docTitle": "Pre-Congestion Notification (PCN) Boundary-Node Behavior for the Controlled Load (CL) Mode of Operation",
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      "confidence": "high",
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    "doi": "10.17487/RFC6661",
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      "confidence": "high",
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      "confidence": "high",
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      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
        "PCN",
        "Controlled Load",
        "CL",
        "Boundary Node Behavior"
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      "overridden": true,
      "source": "parsed",
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      "updated": "2026-10-17T00:35:25.796Z",
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    "pages": "33",
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      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
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    },
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc6661/",
      "updated": "2026-10-16T20:44:35.022Z",
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        "orphan/RFC6661/h:7b24d25d",
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        "flag": "MIXED_REF_LAYOUT_RISK anchored=23 proseBlocks=21 skippedAnchorBlocks=18",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
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        "source": "parsed",
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      },
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        "RFC2474",
        "RFC2475",
        "RFC3086",
        "RFC3289",
        "RFC5424",
        "RFC5559",
        "RFC5670",
        "RFC6660"
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      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
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        "source": "parsed",
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6661/",
        "updated": "2026-10-16T20:44:35.023Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
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        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
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        "source": "parsed",
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        "updated": "2026-10-16T20:44:35.023Z",
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      "latestVersion": true,
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6661/",
        "updated": "2026-10-16T20:44:35.023Z",
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        "source": "parsed",
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        "confidence": "high",
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        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6661/",
        "updated": "2026-10-16T20:44:35.023Z",
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