6to4 Provider Managed Tunnels
draft-kuarsingh-v6ops-6to4-provider-managed-tunnel-05

The information below is for an old version of the document
Document Type Active Internet-Draft (individual)
Authors Victor Kuarsingh  , Yiu Lee  , Olivier Vautrin 
Last updated 2012-02-15 (latest revision 2011-09-27)
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v6ops                                                  V. Kuarsingh, Ed.
Internet-Draft                                     Rogers Communications
Intended status: Informational                                    Y. Lee
Expires: August 19, 2012                                         Comcast
                                                              O. Vautrin
                                                        Juniper Networks
                                                       February 16, 2012

                     6to4 Provider Managed Tunnels
         draft-kuarsingh-v6ops-6to4-provider-managed-tunnel-05

Abstract

   6to4 Provider Managed Tunnels (6to4-PMT) provide a framework which
   can help manage 6to4 [RFC3056] tunnels operating in an anycast
   [RFC3068] configuration.  The 6to4-PMT framework is intended to serve
   as an option to operators to help improve the experience of 6to4
   operation when conditions of the network may provide sub-optimal
   performance or break normal 6to4 operation. 6to4-PMT provides a
   stable provider prefix and forwarding environment by utilizing
   existing 6to4 Relays with an added function of IPv6 Prefix
   Translation.  This operation may be particularly important in NAT444
   infrastructures where a customer endpoint may be assigned a non-
   RFC1918 address thus breaking the return path for anycast [RFC3068]
   based 6to4 operation.

Status of this Memo

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   This Internet-Draft will expire on August 19, 2012.

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Internet-Draft        6to4 Provider Managed Tunnels        February 2012

   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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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Motivation . . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  6to4 Provider Managed Tunnels  . . . . . . . . . . . . . . . .  5
     3.1.  6to4 Provider Managed Tunnel Model . . . . . . . . . . . .  5
     3.2.  Traffic Flow . . . . . . . . . . . . . . . . . . . . . . .  5
     3.3.  Prefix Translation . . . . . . . . . . . . . . . . . . . .  6
     3.4.  Translation State  . . . . . . . . . . . . . . . . . . . .  7
   4.  Deployment Considerations and Requirements . . . . . . . . . .  7
     4.1.  Customer Opt-out . . . . . . . . . . . . . . . . . . . . .  7
     4.2.  Shared CGN Space Considerations  . . . . . . . . . . . . .  8
     4.3.  End to End Transparency  . . . . . . . . . . . . . . . . .  8
     4.4.  Path MTU Discovery Considerations  . . . . . . . . . . . .  9
     4.5.  Routing Requirements . . . . . . . . . . . . . . . . . . .  9
     4.6.  Relay Deployments  . . . . . . . . . . . . . . . . . . . .  9
   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 10
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 10
   7.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 10
   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 10
     8.1.  Normative References . . . . . . . . . . . . . . . . . . . 10
     8.2.  Informative References . . . . . . . . . . . . . . . . . . 10
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 11

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1.  Introduction

   6to4 [RFC3056] tunnelling along with the anycast operation described
   in [RFC3068] is widely deployed in modern Operating Systems and off
   the shelf gateways sold throughout the retail and OEM channels.
   Anycast [RFC3068] based 6to4 allows for tunnelled IPv6 connectivity
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