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IP Mobility Support for IPv4, Revised (RFC5944) Disclosure Number: IPCOM000202023D
Original Publication Date: 2010-Nov-01
Included in the Prior Art Database: 2010-Dec-01

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

C. Perkins: AUTHOR [+1]


IP version 4 assumes that a node's IP address uniquely identifies the node's point of attachment to the Internet. Therefore, a node must be located on the network indicated by its IP address in order to receive datagrams destined to it; otherwise, datagrams destined to the node would be undeliverable. For a node to change its point of attachment without losing its ability to communicate, currently one of the two following mechanisms must typically be employed:

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Internet Engineering Task Force (IETF)                   C. Perkins, Ed. Request for Comments: 5944                                 WiChorus Inc. Obsoletes: 3344                                            November 2010 Category: Standards Track ISSN: 2070-1721

                  IP Mobility Support for IPv4, Revised


   This document specifies protocol enhancements that allow transparent    routing of IP datagrams to mobile nodes in the Internet.  Each mobile    node is always identified by its home address, regardless of its    current point of attachment to the Internet.  While situated away    from its home, a mobile node is also associated with a care-of    address, which provides information about its current point of    attachment to the Internet.  The protocol provides for registering    the care-of address with a home agent.  The home agent sends    datagrams destined for the mobile node through a tunnel to the care-    of address.  After arriving at the end of the tunnel, each datagram    is then delivered to the mobile node.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

Perkins                      Standards Track                    [Page 1]
 RFC 5944                   IP Mobility Support             November 2010

 Copyright Notice

   Copyright (c) 2010 IETF Trust and the persons identified as the    document authors.  All rights reserved.

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   This document may contain material from IETF Documents or IETF    Contributions published or made publicly available before November    10, 2008.  The person(s) controlling the copyright in some of this    material may not h...