SIIT-DC: Stateless IP/ICMP Translation for IPv6 Data Centre Environments
draft-ietf-v6ops-siit-dc-01

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Document Type Active Internet-Draft (v6ops WG)
Last updated 2015-07-24 (latest revision 2015-06-28)
Replaces draft-anderson-v6ops-siit-dc
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IPv6 Operations                                              T. Anderson
Internet-Draft                                            Redpill Linpro
Intended status: Informational                             June 28, 2015
Expires: December 30, 2015

SIIT-DC: Stateless IP/ICMP Translation for IPv6 Data Centre Environments
                      draft-ietf-v6ops-siit-dc-01

Abstract

   This document describes the use of the Stateless IP/ICMP Translation
   (SIIT) algorithm in an IPv6 Internet Data Centre (IDC).  In this
   deployment model, traffic from legacy IPv4-only clients on the
   Internet is translated to IPv6 when reaches the IDC operator's
   network infrastructure.  From that point on, it is treated just as if
   it was traffic from any other IPv6-capable end user.  This
   facilitates a single-stack IPv6-only network infrastructure, as well
   as efficient utilisation of public IPv4 addresses.

   The primary audience is IDC operators who are deploying IPv6, running
   out of available IPv4 addresses, and/or feel that dual stack causes
   undesirable operational complexity.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on December 30, 2015.

Copyright Notice

   Copyright (c) 2015 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

Anderson                Expires December 30, 2015               [Page 1]
Internet-Draft                   SIIT-DC                       June 2015

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

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Single Stack IPv6 Operation . . . . . . . . . . . . . . .   3
     1.2.  Stateless Operation . . . . . . . . . . . . . . . . . . .   4
     1.3.  IPv4 Address Conservation . . . . . . . . . . . . . . . .   4
     1.4.  Clients' IPv4 Source Addresses Visible to Applications  .   5
     1.5.  Compatible with Standard IPv4 and IPv6 Stacks . . . . . .   5
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Architectural Overview  . . . . . . . . . . . . . . . . . . .   7
     3.1.  Packet Flow . . . . . . . . . . . . . . . . . . . . . . .   9
   4.  Deployment Considerations and Guidelines  . . . . . . . . . .  10
     4.1.  Application/Device Support for IPv6 . . . . . . . . . . .  10
     4.2.  Application Support for NAT . . . . . . . . . . . . . . .  10
     4.3.  Application Communication Pattern . . . . . . . . . . . .  10
     4.4.  Choice of Translation Prefix  . . . . . . . . . . . . . .  11
     4.5.  Routing Considerations  . . . . . . . . . . . . . . . . .  12
     4.6.  Location of the SIIT-DC Border Relays . . . . . . . . . .  12
     4.7.  Migration from Dual Stack . . . . . . . . . . . . . . . .  13
     4.8.  Translation of ICMPv6 Errors to IPv4  . . . . . . . . . .  13
     4.9.  MTU and Fragmentation . . . . . . . . . . . . . . . . . .  13
       4.9.1.  IPv4/IPv6 Header Size Difference  . . . . . . . . . .  14
       4.9.2.  IPv6 Atomic Fragments . . . . . . . . . . . . . . . .  14
       4.9.3.  Minimum Path MTU Difference Between IPv4 and IPv6 . .  15
     4.10. IPv4-translatable IPv6 Service Addresses  . . . . . . . .  16
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  17
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  17
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  17
     7.1.  Mistaking the Translation Prefix for a Trusted Network  .  17
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  17
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  17
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  18
   Appendix A.  Complete SIIT-DC IDC topology example  . . . . . . .  20
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  23
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