INTERNET-DRAFT John Curran
Expires: January 1, 2008 July 2007
Intended status: Informational
An Internet Transition Plan
draft-jcurran-v6transitionplan-00
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Copyright Notice
Copyright (C) The IETF Trust (2007).
Abstract
This memo provides one possible plan for transitioning the Internet
from a predominantly IPv4-based connectivity model to a predominantly
IPv6-based connectivity model.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Phased Transition Model . . . . . . . . . . . . . . . . . . . . 2
2.1 Preparation Stage . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Transition Stage . . . . . . . . . . . . . . . . . . . . . . 3
2.3 Post-Transition Stage . . . . . . . . . . . . . . . . . . . . 4
3. Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 5
5. Security Considerations . . . . . . . . . . . . . . . . . . . . 5
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 5
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.1. Normative References . . . . . . . . . . . . . . . . . . . 5
7.2. Informative References . . . . . . . . . . . . . . . . . . 5
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 6
Intellectual Property and Copyright Statements . . . . . . . . . . 6
1. Introduction
This memo provides one possible plan for transitioning the Internet
from a predominantly IPv4-based connectivity model to a predominantly
IPv6-based connectivity model.
Other transition plans are possible and this purely informational
document does not create an obligation on any party to undertake any
of the actions specified herein.
The purpose of specifying this particular transition plan is to allow
for overall assessment of the viability of accomplishing the desired
transition and to begin the discussion of Internet-wide transition
plans in general.
2. Phased Transition Model
It is not reasonable to specify the changes that each and every system
connected to the Internet must undergo in order to achieve the desired
transition, as the number of connected systems precludes creating one
plan that contains such a level of detail. Further, while there are
common scenarios that may be specified for transitioning individual
networks (refer to [RFC3750] [RFC4057] and [CAMP]), the specific
timeline and mechanisms utilized for a given network will be unique.
Despite these challenges, it is necessary to coordinate expectations
on an overall basis so that Internet-wide connectivity is maintained
throughout the transition.
This plan delineates specific phases for the transition activities,
and further breaks downs the necessary activities within each phase
based on the role that an organization plays in the provision of
Internet services.
The three proposed phases are: Preparation Phase, Transition Phase,
and Post-Transition Phase.
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2.1 Preparation Phase - Present to December 2008
In the Preparation Phase, entities prepare to provide
Internet-facing services via IPv6-based connectivity
while continuing to provide Internet-facing services
via IPv4 connectivity.
During the Preparation Phase, the following principles apply:
2.1.1 Service Providers SHOULD offer IPv6-based Internet Service
to their Internet customers. IPv6-based Internet Service
MAY be provided via IPv6 transition mechanisms or native
IPv6 network service.
2.1.2 Organizations SHOULD arrange for IPv6-based Interent
connectivity for any Internet-facing servers (e.g. web,
email, and domain name servers). Internet-facing IPv6
servers MAY be treated as production by the organization,
but MUST NOT be treated as production by other Internet
organizations.
2.1.3 Organizations MAY provide IPv6-based Internet connectivity
to internal user communities.
2.2 Transition Phase - January 2009 to December 2010
In the Transition Phase, entities provide Internet-facing services
via IPv6-based connectivity in addition to IPv4-based connectivity.
During the Transition Phase, the following principles apply:
2.2.1 Service Providers MUST offer IPv6-based Internet Service to
their Internet customers. IPv6-based Internet Service SHOULD
be via native IPv6 network service but MAY be via IPv6
transition mechanisms if necessary.
2.2.2 Organizations MUST arrange for IPv6-based Interent
connectivity for any Internet-facing servers (e.g. web,
email, and domain name servers). Internet-facing IPv6
servers SHOULD be treated as production by the organization,
and MAY be treated as production by other Internet
organizations.
2.2.3 Organizations SHOULD provide IPv6-based Internet connectivity
to their internal user communities, and provide IPv6 internal
supporting servers (e.g. DNS, DHCP). IPv6-based Internet
connectivity MAY be via native IPv6 network service or MAY
be via IPv6 transition mechanisms.
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2.3 Post-Transition Phase - January 2011 to the Future
In the Post-Transition Phase, entities provide all Internet-facing
services via IPv6-based connectivity.
During the Post-Transition Phase, the following principles apply:
2.3.1 Service Providers MUST offer IPv6-based Internet Service to
their Internet customers. IPv6-based Internet Service SHOULD be
via native IPv6 network service but MAY be via IPv6 transition
mechanisms if necessary. IPv6-based Internet Service SHOULD be
treated as production by other Internet organizations.
2.3.2 Organizations MUST arrange for IPv6-based Internet connectivity
for any Internet-facing servers (e.g. web, email, and domain
name servers). Internet-facing IPv6 servers MUST be treated
as production by the organization, and SHOULD be treated as
production by other Internet organizations.
2.3.3 Organizations SHOULD provide IPv6-based Internet connectivity to
internal user communities, and provide IPv6 internal supporting
servers (e.g. DNS, DHCP) IPv6-based Internet connectivity MAY
be via native IPv6 network service or MAY be via IPv6 transition
mechanisms.
2.3.4 Service Providers area MAY continue to offer IPv4-based Internet
connectivity to their customers. Organizations MAY continue to
use IPv4-based Internet connectivity. Organizations MAY remove
IPv4-based Internet connectivity from Internet-facing servers.
3. Summary
In order to facilitate full Internet-wide connectivity during the
transition from IPv4-based connectivity to IPv6-based connectivity,
a transition plan which provides clear guidance to organizations
regarding expectations is necessary. As the specific expectations
change over time, and vary greatly by organization, a phased approach
is specified in this document, with the timeline for each phase set
with the intention of allowing enough time for the necessary planning
and deployment steps which each organization much undertake. This
Internet Transition Plan provides for transition to predominantly
IPv6-connectivity by January 2011 which, with careful management, may
meet the overall requirements of allowing the Internet to scale as
specified in "The Recommendation for the IP Next Generation Protocol"
[RFC1752].
4. Security Considerations
This memo describes the transition of the Internet from IPv4-based
connectivity to predominantly IPv6-based connectivity. This change
inherently has security implications due to the widespread deployment
of a new version of the Internet Protocol but these are beyond the
scope of this document and are covered in [IPV6SEC]. This document
raises no new security issues itself.
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5. IANA Considerations
While no new name or identifier space is created by this document,
the policies for management of Internet Protocol version 4 (IPv4)
address space (which were formed in accordance with [RFC2050]) may
not provide for IPv4 availability through the Transition Phase as
intended by this plan. The IANA should continue work with all parties
to encourage sufficient availability of IPv4 address resources as
necessary to support any resulting transition plan that receives
wide-spead adoption.
6. Acknowledgments
We are grateful for the many thoughtful and helpful suggestions made
by members of the Internet community, and in particular would like
to thank Jim Bound, Scott Bradner, Randy Bush, Geoff Huston, Chris
Morrow, and Jordi Palet for their thoughtful reviews and suggestions
for improvement.
7. References
7.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC1752] Bradner, S., Mankin, A.," The Recommendation for the
IP Next Generation Protocol", RFC 1752, January 1995.
7.2. Informative References
[RFC4057] Bound, J., Ed., "IPv6 Enterprise Network Scenarios",
RFC 4057, June 2005.
[RFC3750] Huitema, C., Austein, R., Satapati, S., and R. van der Pol,
"Unmanaged Networks IPv6 Transition Scenarios", RFC 3750,
April 2004
[CAMP] Chown, T., "IPv6 Campus Transition Scenario Description and
Analysis", (Work in Progress), March 2007.
[RFC2050] Hubbard, K., Kosters, M., Conrad, D., Karrenberg, D., and
J. Postel, "Internet Registry IP Allocation Guidelines",
BCP 12, RFC 2050, November 1996.
[IPV6SEC] Davies, E., "IPv6 Transition/Co-existence Security
Considerations", draft-ietf-v6ops-security-overview-06
(Work in Progress), October 2006.
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Author's Address
John Curran
99 Otis Street
Cambridge, MA USA 20190
Email: jcurran@istaff.org
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