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
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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
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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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