Local-use IPv4/IPv6 Translation Prefix
draft-ietf-v6ops-v4v6-xlat-prefix-00

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IPv6 Operations                                              T. Anderson
Internet-Draft                                            Redpill Linpro
Updates: 6890 (if approved)                                March 9, 2017
Intended status: Standards Track
Expires: September 10, 2017

                 Local-use IPv4/IPv6 Translation Prefix
                  draft-ietf-v6ops-v4v6-xlat-prefix-00

Abstract

   This document reserves the IPv6 prefix 64:ff9b:1::/48 for local use
   within domains that enable IPv4/IPv6 translation mechanisms.  This
   document updates RFC6890.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on September 10, 2017.

Copyright Notice

   Copyright (c) 2017 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
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   (http://trustee.ietf.org/license-info) in effect on the date of
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   described in the Simplified BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   2
   4.  Why 64:ff9b:1::/48? . . . . . . . . . . . . . . . . . . . . .   3
     4.1.  Prefix Length . . . . . . . . . . . . . . . . . . . . . .   3
     4.2.  Prefix Value  . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Deployment Considerations . . . . . . . . . . . . . . . . . .   4
   6.  Checksum Neutrality . . . . . . . . . . . . . . . . . . . . .   5
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Appendix A.  Acknowledgements . . . . . . . . . . . . . . . . . .   7
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   This document reserves 64:ff9b:1::/48 for local use within domains
   that enable IPv4/IPv6 translation mechanisms.  This facilitates the
   co-existence of multiple IPv4/IPv6 translation mechanisms in the same
   network without requiring the use of a Network-Specific Prefix
   assigned from the operator's allocated global unicast address space.

2.  Terminology

   This document makes use of the following terms:

   Network-Specific Prefix (NSP)
      A globally unique prefix assigned by a network operator for use
      with an IPv4/IPv6 translation mechanism [RFC6052].

   Well-Known Prefix (WKP)
      The prefix 64:ff9b::/96, which is reserved for use with the
      [RFC6052] IPv4/IPv6 address translation algorithm.

   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 [RFC2119].

3.  Problem Statement

   Since the WKP 64:ff9b::/96 was reserved by [RFC6052], several new
   IPv4/IPv6 translation mechanisms have been defined by the IETF.
   These mechanisms target various different use cases.  An operator
   might therefore wish to make use of several of them simultaneously.

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   The WKP is reserved specifically for use with the algorithm specified
   in [RFC6052].  More recent IETF documents describe IPv4/IPv6
   translation mechanisms that use different algorithms.  An operator
   deploying such mechanisms can not make use of the WKP in a legitimate
   fashion.

   Also, because the WKP is a /96, an operator preferring to use a WKP