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Unified IPv4-in-IPv6 Softwire Customer Premises Equipment (CPE): A DHCPv6-Based Prioritization Mechanism (RFC8026) Disclosure Number: IPCOM000248338D
Original Publication Date: 2016-Nov-01
Included in the Prior Art Database: 2016-Nov-17
Document File: 22 page(s) / 23K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Boucadair: AUTHOR [+1]


IPv4 service continuity is one of the major technical challenges that must be considered during IPv6 migration. Over the past few years, a number of different approaches have been developed to assist with this problem (e.g., as described in [RFC6333], [RFC7596], and [RFC7597]). These approaches, referred to as "S46 mechanisms" in this document, exist in order to meet the particular deployment, scaling, addressing, and other requirements of different service providers' networks.

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Internet Engineering Task Force (IETF)                      M. Boucadair Request for Comments: 8026                                        Orange Category: Standards Track                                      I. Farrer ISSN: 2070-1721                                      Deutsche Telekom AG                                                            November 2016

     Unified IPv4-in-IPv6 Softwire Customer Premises Equipment (CPE):                 A DHCPv6-Based Prioritization Mechanism


   In IPv6-only provider networks, transporting IPv4 packets    encapsulated in IPv6 is a common solution to the problem of IPv4    service continuity.  A number of differing functional approaches have    been developed for this, each having their own specific    characteristics.  As these approaches share a similar functional    architecture and use the same data plane mechanisms, this memo    specifies a DHCPv6 option, whereby a single instance of Customer    Premises Equipment (CPE) can interwork with all of the standardized    and proposed approaches to providing encapsulated IPv4-in-IPv6    services by providing a prioritization mechanism.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

Boucadair & Farrer           Standards Track                    [Page 1]
 RFC 8026            OPTION_S46_PRIORITY DHCPv6 Option      November 2016

 Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents    ( in effect on the date of    publication of this document.  Please review these documents    carefully, as they describe your rights and restrictions with respect    to this document.  Code Components extracted from this document must    include Simplified BSD License text as described in Section 4.e of    the Trust Legal Provisions and are provided without warranty as    described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . ....