RFC 3846 (rfc3846) - Page 1 of 8

Mobile IPv4 Extension for Carrying Network Access Identifiers

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Network Working Group                                       F. Johansson
Request for Comments: 3846                                   ipUnplugged
Category: Standards Track                                   T. Johansson
                                                              Bytemobile
                                                               June 2004


     Mobile IPv4 Extension for Carrying Network Access Identifiers

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 (2004).

Abstract

   When a mobile node moves between two foreign networks, it has to be
   re-authenticated.  If the home network has both multiple
   Authentication Authorization and Accounting (AAA) servers and Home
   Agents (HAs) in use, the Home AAA server may not have sufficient
   information to process the re-authentication correctly (i.e., to
   ensure that the same HA continues to be used).  This document defines
   a Mobile IP extension that carries identities for the Home AAA and HA
   servers in the form of Network Access Identifiers (NAIs).  The
   extension allows a Home Agent to pass its identity (and that of the
   Home AAA server) to the mobile node, which can then pass it on to the
   local AAA server when changing its point of attachment.  This
   extension may also be used in other situations requiring
   communication of a NAI between Mobile IP nodes.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2.  Requirements terminology . . . . . . . . . . . . . . . . . . .  2
   3.  NAI Carrying Extension . . . . . . . . . . . . . . . . . . . .  3
       3.1.  Processing of the NAI Carrying Extension . . . . . . . .  3
   4.  HA Identity subtype  . . . . . . . . . . . . . . . . . . . . .  4
   5.  AAAH Identity subtype  . . . . . . . . . . . . . . . . . . . .  4
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . .  5
   7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  5
   8.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . .  6



Jhansson & Johansson        Standards Track
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