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    "abstract": "This document defines two Huawei IPCP (IP Control Protocol) options used to convey a set of ports. These options can be used in the context of port range-based solutions or NAT-based solutions for port delegation and forwarding purposes. This document is not an Internet Standards Track specification; it is published for informational purposes.",
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      {
        "name": "Mohamed Boucadair"
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      {
        "name": "Pierre Levis"
      },
      {
        "name": "Gabor Bajko"
      },
      {
        "name": "Teemu Savolainen"
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      {
        "name": "Tina Tsou (Ting ZOU)"
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    "docNumber": "6431",
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      "confidence": "high",
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    "keywords": [
      "IPv4 Address Exhaustion",
      "IPv4 Service Continuity",
      "IPv6",
      "A+P"
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      "confidence": "high",
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    "publicationDate": "2011-11-01",
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
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        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc6431/",
        "updated": "2026-10-20T21:45:11.499Z",
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