Network Working Group JP. Dionne
Internet-Draft S. Perreault
Intended status: Informational Viagenie
Expires: August 26, 2013 T. Tsou
Huawei Technologies (USA)
C. Zhou
Huawei Technologies
February 22, 2013
Gap Analysis for IPv4 Sunset
draft-ietf-sunset4-gapanalysis-02
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
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This Internet-Draft will expire on August 26, 2013.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Related Work . . . . . . . . . . . . . . . . . . . . . . . . 2
3. Remotely Disabling IPv4 . . . . . . . . . . . . . . . . . . . 2
3.1. Indicating that IPv4 connectivity is unavailable . . . . 3
3.2. Disabling IPv4 in the LAN . . . . . . . . . . . . . . . . 3
4. Client Connection Establishment Behavior . . . . . . . . . . 4
5. Disabling IPv4 in Operating System and Applications . . . . . 4
6. On-Demand Provisioning of IPv4 Addresses . . . . . . . . . . 5
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
8. Security Considerations . . . . . . . . . . . . . . . . . . . 5
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 5
10. Informative References . . . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 7
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
proposes new work in this area.
The decision about when to turn off IPv4 is out of scope. This
document merely attempts to enumerate the issues one might encounter
if that decision is made.
2. Related Work
[RFC3789], [RFC3790],[RFC3791], [RFC3792], [RFC3793], [RFC3794],
[RFC3795] and [RFC3796] contain surveys of IETF protocols with their
IPv4 dependencies.
3. Remotely Disabling IPv4
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3.1. Indicating that IPv4 connectivity is unavailable
PROBLEM 1: When an IPv4 node boots and requests an IPv4 address
(e.g., using DHCP), it typically interprets the absence of a
response as a failure condition even when it is not.
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