{
  "draft": "draft-ietf-softwire-lw4over6-13",
  "doc_id": "RFC7596",
  "title": "Lightweight 4over6: An Extension to the Dual-Stack Lite Architecture",
  "authors": [
    "Y. Cui",
    "Q. Sun",
    "M. Boucadair",
    "T. Tsou",
    "Y. Lee",
    "I. Farrer"
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "22",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "Softwires",
  "abstract": "Dual-Stack Lite (DS-Lite) (RFC 6333) describes an architecture for transporting IPv4 packets over an IPv6 network.  This document specifies an extension to DS-Lite called \"Lightweight 4over6\", which moves the Network Address and Port Translation (NAPT) function from the centralized DS-Lite tunnel concentrator to the tunnel client located in the Customer Premises Equipment (CPE).  This removes the requirement for a Carrier Grade NAT function in the tunnel concentrator and reduces the amount of centralized state that must be held to a per-subscriber level.  In order to delegate the NAPT function and make IPv4 address sharing possible, port-restricted IPv4 addresses are allocated to the CPEs.",
  "pub_date": "July 2015",
  "keywords": [
    "DS-Lite",
    "address sharing",
    "address exhaustion",
    "aplusp",
    "A+P",
    "IPv4 service continuity",
    "IPv4 over IPv6 connectivity"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [],
  "see_also": [],
  "doi": "10.17487/RFC7596",
  "errata_url": null
}