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  "docId": "RFC9408",
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    "abstract": "This document defines a YANG data model for representing an abstract view of the provider network topology that contains the points from which its services can be attached (e.g., basic connectivity, VPN, network slices). Also, the model can be used to retrieve the points where the services are actually being delivered to customers (including peer networks). This document augments the 'ietf-network' data model defined in RFC 8345 by adding the concept of Service Attachment Points (SAPs). The SAPs are the network reference points to which network services, such as Layer 3 Virtual Private Network (L3VPN) or Layer 2 Virtual Private Network (L2VPN), can be attached. One or multiple services can be bound to the same SAP. Both User-to-Network Interface (UNI) and Network-to-Network Interface (NNI) are supported in the SAP data model.",
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    "authors": [
      {
        "name": "Mohamed Boucadair"
      },
      {
        "name": "Oscar Gonzalez de Dios"
      },
      {
        "name": "Samier Barguil"
      },
      {
        "name": "Qin Wu"
      },
      {
        "name": "Victor Lopez"
      }
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    "doi": "10.17487/RFC9408",
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      "Service Infrastructure",
      "UNI",
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      "Inter-AS VPN",
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      "Service Delivery Point",
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      "Service Delivery"
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      "confidence": "high",
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        "IETF.draft-ietf-bess-bgp-sdwan-usage-09",
        "IETF.draft-ietf-teas-enhanced-vpn-12",
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        "IETF.draft-ietf-teas-ietf-network-slices-19",
        "RFC4026",
        "RFC4364",
        "RFC4761",
        "RFC4762",
        "RFC6004",
        "RFC6215",
        "RFC7149",
        "RFC7224",
        "RFC7426",
        "RFC7432",
        "RFC7623",
        "RFC7951",
        "RFC8214",
        "RFC8299",
        "RFC8309",
        "RFC8340",
        "RFC8342",
        "RFC8365",
        "RFC8453",
        "RFC8466",
        "RFC8969",
        "RFC9135",
        "RFC9182",
        "RFC9291",
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        "orphan/RFC9408/h:64ab4903"
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        "RFC8040",
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        "RFC8795",
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        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc9408/",
        "updated": "2026-10-22T15:18:32.032Z",
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