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Evaluation of IPv6 Transition Mechanisms for Unmanaged Networks
RFC 3904

Document type: RFC - Informational (September 2004; No errata)
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 3904 (Informational)
Responsible AD: David Kessens
Send notices to: pekkas@netcore.fi, jonne.Soininen@nokia.com

Network Working Group                                         C. Huitema
Request for Comments: 3904                                     Microsoft
Category: Informational                                       R. Austein
                                                                     ISC
                                                             S. Satapati
                                                     Cisco Systems, Inc.
                                                          R. van der Pol
                                                              NLnet Labs
                                                          September 2004

    Evaluation of IPv6 Transition Mechanisms for Unmanaged Networks

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2004).

Abstract

   This document analyzes issues involved in the transition of
   "unmanaged networks" from IPv4 to IPv6.  Unmanaged networks typically
   correspond to home networks or small office networks.  A companion
   paper analyzes out the requirements for mechanisms needed in various
   transition scenarios of these networks to IPv6.  Starting from this
   analysis, we evaluate the suitability of mechanisms that have already
   been specified, proposed, or deployed.

Table of Contents:

   1.  Introduction .................................................  2
   2.  Evaluation of Tunneling Solutions ............................  3
       2.1.  Comparing Automatic and Configured Solutions ...........  3
             2.1.1.  Path Optimization in Automatic Tunnels .........  4
             2.1.2.  Automatic Tunnels and Relays ...................  4
             2.1.3.  The Risk of Several Parallel IPv6 Internets ....  5
             2.1.4.  Lifespan of Transition Technologies ............  6
       2.2.  Cost and Benefits of NAT Traversal .....................  6
             2.2.1.  Cost of NAT Traversal ..........................  7
             2.2.2.  Types of NAT ...................................  7
             2.2.3.  Reuse of Existing Mechanisms ...................  8
       2.3.  Development of Transition Mechanisms ...................  8

Huitema, et al.              Informational                      [Page 1]
RFC 3904          Unmanaged Networks Transition Tools     September 2004

   3.  Meeting Case A Requirements ..................................  9
       3.1.  Evaluation of Connectivity Mechanisms ..................  9
       3.2.  Security Considerations in Case A ......................  9
   4.  Meeting case B Requirements .................................. 10
       4.1.  Connectivity ........................................... 10
             4.1.1.  Extending a Subnet to Span Multiple Links ...... 10
             4.1.2.  Explicit Prefix Delegation ..................... 11
             4.1.3.  Recommendation ................................. 11
       4.2.  Communication Between IPv4-only and IPv6-Capable Nodes . 11
       4.3.  Resolution of Names to IPv6 Addresses .................. 12
             4.3.1.  Provisioning the Address of a DNS Resolver ..... 12
             4.3.2.  Publishing IPv6 Addresses to the Internet ...... 12
             4.3.3.  Resolving the IPv6 Addresses of Local Hosts .... 13
             4.3.4.  Recommendations for Name Resolution ............ 13
       4.4.  Security Considerations in Case B ...................... 14
   5.  Meeting Case C Requirements .................................. 14
       5.1.  Connectivity ........................................... 14
   6.  Meeting the Case D Requirements .............................. 14
       6.1.  IPv6 Addressing Requirements ........................... 15
       6.2.  IPv4  Connectivity Requirements ........................ 15
       6.3.  Naming Requirements .................................... 15
   7.  Recommendations .............................................. 15
   8.  Security Considerations ...................................... 16
   9.  Acknowledgements ............................................. 16
   10. References ................................................... 16
   11. Authors' Addresses ........................................... 18
   12. Full Copyright Statement ..................................... 19

1.  Introduction

   This document analyzes the issues involved in the transition from
   IPv4 to IPv6 [IPV6].  In a companion paper [UNMANREQ] we defined the
   "unmanaged networks", which typically correspond to home networks or
   small office networks, and the requirements for transition mechanisms
   in various scenarios of transition to IPv6.

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