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Versions: 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 RFC 6598

Network Working Group                                            J. Weil
Internet-Draft                                        Cox Communications
Intended status: Informational                              V. Kuarsingh
Expires: May 13, 2011                              Rogers Communications
                                                               C. Donley
                                                               CableLabs
                                                         C. LILJENSTOLPE
                                                            Telstra Corp
                                                              M. Azinger
                                                 Frontier Communications
                                                        November 9, 2010


         IANA Reserved IPv4 Prefix for Shared Transition Space
             draft-weil-shared-transition-space-request-00

Abstract

   This document requests a reserved IANA IPv4 address allocation as
   Shared Transition Space to support the deployment of IPv4 address
   sharing technologies post IPv4 exhaustion.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 13, 2011.

Copyright Notice

   Copyright (c) 2010 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



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   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 . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Motivation . . . . . . . . . . . . . . . . . . . . . . . . . .  4
   3.  Shared Transition Space  . . . . . . . . . . . . . . . . . . .  5
   4.  Security Considerations  . . . . . . . . . . . . . . . . . . .  6
   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  7
   6.  Informative References . . . . . . . . . . . . . . . . . . . .  8
   Appendix A.  Acknowledgements  . . . . . . . . . . . . . . . . . .  9
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 10


































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1.  Introduction

   Many operators are currently implimenting their IPv6 transition
   plans.  During the transition, continued support for heritage IPv4
   only devices will be required.  While most operators are well aware
   of the limitations of NAT444 [I-D.shirasaki-nat444], it is the
   transition mechnism that has the least customer impact for many
   carriers.

   To deal with some of the NAT444 limitations, it becomes necessary for
   a provider to utilize address space in the NAT444 infrastructure that
   will not conflict with it's customer space.

   This document requests that IANA reserve a portion of the remaining
   unallocated space as Shared Transition Space for the enablement of a
   clean transition strategy in provider networks.



































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2.  Motivation

   The Internet community is rapidly consuming the remaining supply of
   unallocated IPv4 addresses.  During the transition period to IPv6, it
   is imperative that Service Providers maintain IPv4 service for
   devices and networks that are currently incapable of upgrading to
   IPv6.

   In order to provide IPv4 service to customers and/or devices once the
   IPv4 address space is exhausted, Service Providers must multiplex
   several subscribers behind a single IPv4 address using one of several
   techniques including NAT444 .  Providers need sufficient non-
   [RFC1918] address space to deploy such technologies and avoid overlap
   with customer use of private address space.





































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3.  Shared Transition Space

   This document proposes the assignment of the equivalent of a /10 as
   Shared Transition Space.  This block MAY be composed of one
   contiguous assignment, or several discontiguous assignments.  Shared
   Transition Space is IPv4 address space reserved for Infrastructure
   provider use with the purpose of facilitating IPv6 transition and
   IPv4 coexistence deployment.  The requested block SHOULD NOT be
   utilized for any purpose other than IPv4 to IPv6 transition
   infrastructure.  Network equipment manufacturers MUST NOT use the
   assigned block in default or example device configurations.

   Because Shared Transition addresses have no meaning outside of the
   Infrastructure Provider, routing information about shared transition
   space networks MUST NOT be propagated on IInterdomain links, and
   packets with shared transition source or destination addresses SHOULD
   NOT be forwarded across such links.  Internet service providers
   SHOULD filter out routing information about shared transition space
   networks on ingress links.
































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4.  Security Considerations

   This memo does not define any protocol, and raises no security
   issues.  Any addresses allocated as Shared Transition Space would not
   be routable on the Internet.














































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5.  IANA Considerations

   IANA is asked to reserve an IPv4 /10 from its remaining pool of
   unallocated IPv4 addresses for use as Shared Transition Space.















































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6.  Informative References

   [I-D.shirasaki-nat444]
              Yamagata, I., Shirasaki, Y., Nakagawa, A., Yamaguchi, J.,
              and H. Ashida, "NAT444", draft-shirasaki-nat444-02 (work
              in progress), July 2010.

   [RFC1918]  Rekhter, Y., Moskowitz, R., Karrenberg, D., Groot, G., and
              E. Lear, "Address Allocation for Private Internets",
              BCP 5, RFC 1918, February 1996.









































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Appendix A.  Acknowledgements

   Thanks to the following people (in alphabetical order) for their
   guidance and feedback:

      John Brzozowski

      Isaiah Connell

      Greg Davies

      Kirk Erichsen

      Wes George

      Tony Hain

      Philip Matthews

      John Pomeroy

      Barbara Stark

      Jean-Francois Tremblay

      Leo Vegoda

      Steven Wright

      Ikuhei Yamagata





















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Authors' Addresses

   Jason Weil
   Cox Communications
   1400 Lake Hearn Drive
   Atlanta, GA  30319
   USA

   Email: jason.weil@cox.com


   Victor Kuarsingh
   Rogers Communications
   8200 Dixie Road
   Brampton, ON  L6T 0C1
   Canada

   Email: victor.kuarsingh@rci.rogers.com


   Chris Donley
   CableLabs
   858 Coal Creek Circle
   Louisville, CO  80027
   USA

   Email: c.donley@cablelabs.com


   Christopher Liljenstolpe
   Telstra Corp
   7/242 Exhibition Street
   Melbourne, VIC  316
   AU

   Phone: +61 3 8647 6389
   Fax:
   Email: cdl@asgaard.org
   URI:












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   Marla Azinger
   Frontier Communications
   Vancouver, WA
   US

   Phone: +1.360.513.2293
   Fax:
   Email: marla.azinger@frontiercorp.com
   URI:










































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