Scenarios and Analysis for Introducing IPv6 into ISP Networks
RFC 4029

Network Working Group                                            M. Lind
Request for Comments: 4029                                   TeliaSonera
Category: Informational                                       V. Ksinant
                                                   Thales Communications
                                                                 S. Park
                                                     SAMSUNG Electronics
                                                               A. Baudot
                                                          France Telecom
                                                               P. Savola
                                                               CSC/Funet
                                                              March 2005

     Scenarios and Analysis for Introducing IPv6 into ISP 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 (2005).

Abstract

   This document describes different scenarios for the introduction of
   IPv6 into an ISP's existing IPv4 network without disrupting the IPv4
   service.  The scenarios for introducing IPv6 are analyzed, and the
   relevance of already defined transition mechanisms are evaluated.
   Known challenges are also identified.

Table of Contents

   1.   Introduction. . . . . . . . . . . . . . . . . . . . . . . . .  2
        1.1.  Goal and Scope of the Document. . . . . . . . . . . . .  2
   2.   Brief Description of a Generic ISP Network. . . . . . . . . .  3
   3.   Transition Scenarios. . . . . . . . . . . . . . . . . . . . .  4
        3.1.  Identification of Stages and Scenarios. . . . . . . . .  4
        3.2.  Stages. . . . . . . . . . . . . . . . . . . . . . . . .  5
              3.2.1.  Stage 1 Scenarios: Launch . . . . . . . . . . .  5
              3.2.2.  Stage 2a Scenarios: Backbone. . . . . . . . . .  6
              3.2.3.  Stage 2b Scenarios: Customer Connection . . . .  6
              3.2.4.  Stage 3 Scenarios: Complete . . . . . . . . . .  7
              3.2.5.  Stages 2a and 3: Combination Scenarios. . . . .  7
        3.3.  Transition Scenarios. . . . . . . . . . . . . . . . . .  7
        3.4.  Actions Needed When Deploying IPv6 in an ISP's Network.  8

Lind, et al.                 Informational                      [Page 1]
RFC 4029              ISP Networks IPv6 Scenarios             March 2005

   4.   Backbone Transition Actions . . . . . . . . . . . . . . . . .  9
        4.1.  Steps in the Transition of Backbone Networks. . . . . .  9
              4.1.1.  MPLS Backbone . . . . . . . . . . . . . . . . .  9
        4.2.  Configuration of Backbone Equipment . . . . . . . . . . 10
        4.3.  Routing . . . . . . . . . . . . . . . . . . . . . . . . 10
              4.3.1.  IGP . . . . . . . . . . . . . . . . . . . . . . 11
              4.3.2.  EGP . . . . . . . . . . . . . . . . . . . . . . 12
              4.3.3.  Transport of Routing Protocols. . . . . . . . . 12
        4.4.  Multicast . . . . . . . . . . . . . . . . . . . . . . . 13
   5.   Customer Connection Transition Actions. . . . . . . . . . . . 13
        5.1.  Steps in the Transition of Customer Connection Networks 13
              5.1.1.  Small End Sites . . . . . . . . . . . . . . . . 14
              5.1.2.  Large End Sites . . . . . . . . . . . . . . . . 15
        5.2.  User Authentication/Access Control Requirements . . . . 15
        5.3.  Configuration of Customer Equipment . . . . . . . . . . 16
        5.4.  Requirements for Traceability . . . . . . . . . . . . . 16
        5.5.  Ingress Filtering in the Customer Connection Network. . 17
        5.6.  Multihoming . . . . . . . . . . . . . . . . . . . . . . 17
        5.7.  Quality of Service. . . . . . . . . . . . . . . . . . . 17
   6.   Network and Service Operation Actions . . . . . . . . . . . . 18
   7.   Future Stages . . . . . . . . . . . . . . . . . . . . . . . . 18
   8.   Requirements for Follow-On Work . . . . . . . . . . . . . . . 19
   9.   Example Networks. . . . . . . . . . . . . . . . . . . . . . . 19
        9.1.  Example 1 . . . . . . . . . . . . . . . . . . . . . . . 21
        9.2.  Example 2 . . . . . . . . . . . . . . . . . . . . . . . 22
        9.3.  Example 3 . . . . . . . . . . . . . . . . . . . . . . . 23
   10.  Security Considerations . . . . . . . . . . . . . . . . . . . 23
   11.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 24
   12.  Informative References. . . . . . . . . . . . . . . . . . . . 24
        Appendix A. . . . . . . . . . . . . . . . . . . . . . . . . . 26
        Authors' Addresses. . . . . . . . . . . . . . . . . . . . . . 27