Recommendations for IPv6 in Third Generation Partnership Project (3GPP) Standards
RFC 3314

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Network Working Group                                  M. Wasserman, Ed.
Request for Comments: 3314                                    Wind River
Category: Informational                                   September 2002

                      Recommendations for IPv6 in
         Third Generation Partnership Project (3GPP) Standards

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 (2002).  All Rights Reserved.

Abstract

   This document contains recommendations from the Internet Engineering
   Task Force (IETF) IPv6 Working Group to the Third Generation
   Partnership Project (3GPP) community regarding the use of IPv6 in the
   3GPP standards.  Specifically, this document recommends that the 3GPP
   specify that multiple prefixes may be assigned to each primary PDP
   context, require that a given prefix must not be assigned to more
   than one primary PDP context, and allow 3GPP nodes to use multiple
   identifiers within those prefixes, including randomly generated
   identifiers.

   The IPv6 Working Group supports the use of IPv6 within 3GPP and
   offers these recommendations in a spirit of open cooperation between
   the IPv6 Working Group and the 3GPP community.  Since the original
   publication of this document as an Internet-Draft, the 3GPP has
   adopted the primary recommendations of this document.

Conventions Used In This Document

   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 BCP 14, RFC 2119
   [KEYWORD].

Wasserman                    Informational                      [Page 1]
RFC 3314       Recommendations for IPv6 in 3GPP Standards September 2002

Table of Contents

   1       Introduction.............................................  2
   1.1     What is the 3GPP?........................................  3
   1.2     What is the IETF?........................................  4
   1.3     Terminology..............................................  4
   1.3.1   3GPP Terminology.........................................  4
   1.3.2   IETF Terminology.........................................  5
   1.4     Overview of the IPv6 Addressing Architecture.............  6
   1.5     An IP-Centric View of the 3GPP System....................  7
   1.5.1   Overview of the UMTS Architecture........................  7
   1.5.2   The PDP Context.......................................... 10
   1.5.3   IPv6 Address Autoconfiguration in GPRS................... 11
   2       Recommendations to the 3GPP.............................. 13
   2.1     Limitations of 3GPP Address Assignment................... 13
   2.2     Advertising Multiple Prefixes............................ 14
   2.3     Assigning a Prefix to Only One Primary PDP Context....... 14
   2.3.1   Is a /64 per PDP Context Too Much?....................... 15
   2.3.2   Prefix Information in the SGSN........................... 16
   2.4     Multiple Identifiers per PDP Context..................... 16
   3       Additional IPv6 Work Items............................... 16
   4       Security Considerations.................................. 17
   Appendix A:  Analysis of Findings................................ 18
   Address Assignment Solutions..................................... 18
   References....................................................... 19
   Authors and Acknowledgements..................................... 22
   Editor's Address................................................. 22
   Full Copyright Statement......................................... 23

1. Introduction

   In May 2001, the IPv6 Working Group (WG) held an interim meeting in
   Redmond, WA to discuss the use of IPv6 within the 3GPP standards.
   The first day of the meeting was a joint discussion with 3GPP, during
   which an architectural overview of 3GPP's usage of IPv6 was
   presented, and there was much discussion regarding particular aspects
   of IPv6 usage within 3GPP.  At that meeting, a decision was made to
   form a design team to write a document offering advice from the IPv6
   WG to the 3GPP community, regarding their use of IPv6.  This document
   is the result of that effort.

   This document offers recommendations to the 3GPP community from the
   IETF IPv6 Working Group.  It is organized into three main sections:

      1. An introduction (this section) that provides background
         information regarding the IETF IPv6 WG and the 3GPP and
         includes a high-level overview of the technologies discussed in
         this document.

Wasserman                    Informational                      [Page 2]
RFC 3314       Recommendations for IPv6 in 3GPP Standards September 2002

      2. Recommendations from the IPv6 WG to the 3GPP community.  These