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Network Mobility (NEMO) Extensions for Mobile IPv4
RFC 5177

Document type: RFC - Proposed Standard (April 2008; No errata)
Updated by RFC 6626
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 5177 (Proposed Standard)
Responsible AD: Jari Arkko
Send notices to: mip4-chairs@tools.ietf.org, draft-ietf-mip4-nemo-v4-base@tools.ietf.org

Network Working Group                                           K. Leung
Request for Comments: 5177                                    G. Dommety
Category: Standards Track                                  Cisco Systems
                                                            V. Narayanan
                                                          Qualcomm, Inc.
                                                             A. Petrescu
                                                                Motorola
                                                              April 2008

           Network Mobility (NEMO) Extensions for Mobile IPv4

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

   This document describes a protocol for supporting Mobile Networks
   between a Mobile Router and a Home Agent by extending the Mobile IPv4
   protocol.  A Mobile Router is responsible for the mobility of one or
   more network segments or subnets moving together.  The Mobile Router
   hides its mobility from the nodes on the Mobile Network.  The nodes
   on the Mobile Network may be fixed in relationship to the Mobile
   Router and may not have any mobility function.

   Extensions to Mobile IPv4 are introduced to support Mobile Networks.

Leung, et al.               Standards Track                     [Page 1]
RFC 5177                     Mobile Router                    April 2008

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Examples of Mobile Networks  . . . . . . . . . . . . . . .  3
     1.2.  Overview of Protocol . . . . . . . . . . . . . . . . . . .  5
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  6
   3.  Requirements . . . . . . . . . . . . . . . . . . . . . . . . .  7
   4.  Mobile Network Extensions  . . . . . . . . . . . . . . . . . .  8
     4.1.  Mobile Network Request Extension . . . . . . . . . . . . .  8
     4.2.  Mobile Network Acknowledgement Extension . . . . . . . . .  9
   5.  Mobile Router Operation  . . . . . . . . . . . . . . . . . . . 11
     5.1.  Error Processing . . . . . . . . . . . . . . . . . . . . . 12
     5.2.  Mobile Router Management . . . . . . . . . . . . . . . . . 12
   6.  Home Agent Operation . . . . . . . . . . . . . . . . . . . . . 13
     6.1.  Summary  . . . . . . . . . . . . . . . . . . . . . . . . . 13
     6.2.  Data Structures  . . . . . . . . . . . . . . . . . . . . . 14
       6.2.1.  Registration Table . . . . . . . . . . . . . . . . . . 14
       6.2.2.  Prefix Table . . . . . . . . . . . . . . . . . . . . . 14
     6.3.  Mobile Network Prefix Registration . . . . . . . . . . . . 14
     6.4.  Advertising Mobile Network Reachability  . . . . . . . . . 16
     6.5.  Establishment of Bi-directional Tunnel . . . . . . . . . . 16
     6.6.  Sending Registration Replies . . . . . . . . . . . . . . . 17
     6.7.  Mobile Network Prefix Deregistration . . . . . . . . . . . 17
   7.  Data Forwarding Operation  . . . . . . . . . . . . . . . . . . 17
   8.  Nested Mobile Networks . . . . . . . . . . . . . . . . . . . . 18
   9.  Routing Protocol between Mobile Router and Home Agent  . . . . 18
   10. Security Considerations  . . . . . . . . . . . . . . . . . . . 19
     10.1. Security when Dynamic Routing Protocol Is Used . . . . . . 20
   11. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 20
   12. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 22
   13. References . . . . . . . . . . . . . . . . . . . . . . . . . . 23
     13.1. Normative References . . . . . . . . . . . . . . . . . . . 23
     13.2. Informative References . . . . . . . . . . . . . . . . . . 24

Leung, et al.               Standards Track                     [Page 2]
RFC 5177                     Mobile Router                    April 2008

1.  Introduction

   This document describes network mobility extensions to the Mobile
   IPv4 protocol.  The goal of introducing these extensions is to
   accommodate mobility scenarios where groups of hosts and routers move
   homogeneously (as a whole).  It is required that all hosts and
   routers in a Mobile Network be able to run applications connecting to
   the Internet, and be reachable from the Internet.

   For details regarding terminology related to network mobility (NEMO),
   a quick read of RFC 4885 [RFC4885] is suggested.

1.1.  Examples of Mobile Networks

   A Mobile Network links together a set of hosts and routers.

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