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Mobile Node Identifier Option for Mobile IPv6 (MIPv6)
RFC 4283

Network Working Group                                           A. Patel
Request for Comments: 4283                                      K. Leung
Category: Standards Track                                  Cisco Systems
                                                               M. Khalil
                                                               H. Akhtar
                                                         Nortel Networks
                                                            K. Chowdhury
                                                        Starent Networks
                                                           November 2005

         Mobile Node Identifier Option for Mobile IPv6 (MIPv6)

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

   Mobile IPv6 (MIPv6) defines a new Mobility header that is used by
   mobile nodes, correspondent nodes, and home agents in all messaging
   related to the creation and management of bindings.  Mobile IPv6
   nodes need the capability to identify themselves using an identity
   other than the default home IP address.  Some examples of identifiers
   include Network Access Identifier (NAI), Fully Qualified Domain Name
   (FQDN), International Mobile Station Identifier (IMSI), and Mobile
   Subscriber Number (MSISDN).  This document defines a new mobility
   option that can be used by Mobile IPv6 entities to identify
   themselves in messages containing a mobility header.

Patel, et al.               Standards Track                     [Page 1]
RFC 4283        Mobile Node Identifier Option for MIPv6    November 2005

Table of Contents

   1. Introduction ....................................................2
   2. Terminology .....................................................3
   3. Mobile Node Identifier Option ...................................3
      3.1. MN-NAI Mobility Option .....................................4
      3.2. Processing Considerations ..................................4
   4. Security Considerations .........................................4
      4.1. General Considerations .....................................4
      4.2. MN-NAI Considerations ......................................4
   5. IANA Considerations .............................................5
   6. Acknowledgements ................................................5
   7. Normative References ............................................5
   8. Informative Reference ...........................................6

1.  Introduction

   The base specification of Mobile IPv6 [RFC3775] identifies mobility
   entities using an IPv6 address.  It is essential to have a mechanism
   wherein mobility entities can be identified using other identifiers
   (for example, a Network Access Identifier (NAI) [RFC4282],
   International Mobile Station Identifier (IMSI), or an application/
   deployment specific opaque identifier).

   The capability to identify a mobility entity via identifiers other
   than the IPv6 address can be leveraged for performing various
   functions, for example,

   o  authentication and authorization using an existing AAA
      (Authentication, Authorization, and Accounting) infrastructure or
      via an HLR/AuC (Home Location Register/Authentication Center)

   o  dynamic allocation of a mobility anchor point

   o  dynamic allocation of a home address

   This document defines an option with a subtype number that denotes a
   specific type of identifier.  One instance of subtype, the NAI, is
   defined in Section 3.1.  It is anticipated that other identifiers
   will be defined for use in the mobility header in the future.

   This option SHOULD be used when Internet Key Exchange (IKE)/IPsec is
   not used for protecting binding updates or binding acknowledgements
   as specified in [RFC3775].  It is typically used with the
   authentication option [RFC4285].  But this option may be used
   independently.  For example, the identifier can provide accounting
   and billing services.

Patel, et al.               Standards Track                     [Page 2]
RFC 4283        Mobile Node Identifier Option for MIPv6    November 2005

2.  Terminology

   The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this

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