Gap Analysis for IPv4 Sunset
draft-ietf-sunset4-gapanalysis-08

Document Type Active Internet-Draft (sunset4 WG)
Last updated 2017-06-26
Replaces draft-dionne-sunset4-v4gapanalysis
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Network Working Group                                             W. Liu
Internet-Draft                                                     W. Xu
Intended status: Informational                                   C. Zhou
Expires: December 25, 2017                               Huawei Technologies                    
                                                                 T. Tsou
                                                        Philips Lighting
                                                            S. Perreault
                                                     Jive Communications
                                                                                                                                  P. Fan
                                                            China Mobile
                                                           June 26, 2017

                      Gap Analysis for IPv4 Sunset
                   draft-ietf-sunset4-gapanalysis-08

Abstract

   Sunsetting IPv4 refers to the process of turning off IPv4
   definitively.  It can be seen as the final phase of the migration to
   IPv6.  This memo enumerates difficulties arising when sunsetting
   IPv4, and identifies the gaps requiring additional work.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on December 25, 2017.

Copyright Notice

   Copyright (c) 2015 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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect

Liu, et al.             Expires December 25, 2017               [Page 1]
Internet-Draft          IPv4 Sunsetting Analysis               June 2017

   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Related Work  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Remotely Disabling IPv4 . . . . . . . . . . . . . . . . . . .   4
     3.1.  Indicating that IPv4 connectivity is unavailable  . . . .   4
     3.2.  Disabling IPv4 in the LAN . . . . . . . . . . . . . . . .   4
   4.  Client Connection Establishment Behavior  . . . . . . . . . .   5
   5.  Disabling IPv4 in Operating System and Applications . . . . .   5
   6.  On-Demand Provisioning of IPv4 Addresses  . . . . . . . . . .   6
   7.  IPv4 Address Literals . . . . . . . . . . . . . . . . . . . .   6
   8.  Managing Router Identifiers . . . . . . . . . . . . . . . . .   7
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   10. Security Considerations . . . . . . . . . . . . . . . . . . .   7
   11. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   12. Informative References  . . . . . . . . . . . . . . . . . . .   7
   Appendix A.  Solution Ideas . . . . . . . . . . . . . . . . . . .   9
     A.1.  Remotely Disabling IPv4 . . . . . . . . . . . . . . . . .   9
       A.1.1.  Indicating that IPv4 connectivity is unavailable  . .   9
       A.1.2.  Disabling IPv4 in the LAN . . . . . . . . . . . . . .   9
     A.2.  Client Connection Establishment Behavior  . . . . . . . .  10
     A.3.  Disabling IPv4 in Operating System and Applications . . .  10
     A.4.  Managing Router Identifiers . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   The final phase of the migration to IPv6 is the sunset of IPv4, that
   is turning off IPv4 definitively on the attached networks and on the
   upstream networks.

   Some current implementation behavior makes it hard to sunset IPv4.
   Additionally, some new features could be added to IPv4 to make its
   sunsetting easier.  This document analyzes the current situation and
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