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Proxy Mobile IPv6
RFC 5213

Network Working Group                                 S. Gundavelli, Ed.
Request for Comments: 5213                                      K. Leung
Category: Standards Track                                          Cisco
                                                          V. Devarapalli
                                                                Wichorus
                                                            K. Chowdhury
                                                        Starent Networks
                                                                B. Patil
                                                                   Nokia
                                                             August 2008

                           Proxy Mobile IPv6

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.

Abstract

   Network-based mobility management enables IP mobility for a host
   without requiring its participation in any mobility-related
   signaling.  The network is responsible for managing IP mobility on
   behalf of the host.  The mobility entities in the network are
   responsible for tracking the movements of the host and initiating the
   required mobility signaling on its behalf.  This specification
   describes a network-based mobility management protocol and is
   referred to as Proxy Mobile IPv6.

Gundavelli, et al.          Standards Track                     [Page 1]
RFC 5213                   Proxy Mobile IPv6                 August 2008

Table of Contents

   1.  Introduction .................................................  4
   2.  Conventions and Terminology  .................................  5
     2.1.  Conventions Used in This Document  .......................  5
     2.2.  Terminology  .............................................  5
   3.  Proxy Mobile IPv6 Protocol Overview  .........................  9
   4.  Proxy Mobile IPv6 Protocol Security  ......................... 15
     4.1.  Peer Authorization Database (PAD) Example Entries  ....... 16
     4.2.  Security Policy Database (SPD) Example Entries ........... 17
   5.  Local Mobility Anchor Operation  ............................. 17
     5.1.  Extensions to Binding Cache Entry Data Structure ......... 18
     5.2.  Supported Home Network Prefix Models ..................... 19
     5.3.  Signaling Considerations ................................. 20
       5.3.1.  Processing Proxy Binding Updates ..................... 20
       5.3.2.  Initial Binding Registration (New Mobility Session) .. 22
       5.3.3.  Binding Lifetime Extension (No Handoff)  ............. 23
       5.3.4.  Binding Lifetime Extension (After Handoff) ........... 24
       5.3.5.  Binding De-Registration  ............................. 24
       5.3.6.  Constructing the Proxy Binding Acknowledgement
               Message  ............................................. 25
     5.4.  Multihoming Support  ..................................... 27
       5.4.1.  Binding Cache Entry Lookup Considerations  ........... 28
     5.5.  Timestamp Option for Message Ordering  ................... 34
     5.6.  Routing Considerations ................................... 37
       5.6.1.  Bi-Directional Tunnel Management ..................... 37
       5.6.2.  Forwarding Considerations  ........................... 38
       5.6.3.  Explicit Congestion Notification (ECN)
               Considerations for Proxy Mobile IPv6 Tunnels ......... 39
     5.7.  Local Mobility Anchor Address Discovery  ................. 40
     5.8.  Mobile Prefix Discovery Considerations ................... 40
     5.9.  Route Optimization Considerations  ....................... 41
   6.  Mobile Access Gateway Operation  ............................. 41
     6.1.  Extensions to Binding Update List Entry Data Structure ... 42
     6.2.  Mobile Node's Policy Profile ............................. 43
     6.3.  Supported Access Link Types  ............................. 44
     6.4.  Supported Address Configuration Modes  ................... 44
     6.5.  Access Authentication and Mobile Node Identification ..... 45
     6.6.  Acquiring Mobile Node's Identifier ....................... 45
     6.7.  Home Network Emulation ................................... 46
     6.8.  Link-local and Global Address Uniqueness ................. 46
     6.9.  Signaling Considerations ................................. 48
       6.9.1.  Binding Registrations  ............................... 48
       6.9.2.  Router Solicitation Messages ......................... 56

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