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[802SEC] FW: [New-work] WG Review: Recharter of Mobility for IPv4 (mip4)

This announcement may be of interest to your working group members. 

-----Original Message-----
From: IESG Secretary [] 
Sent: Monday, June 26, 2006 3:38 PM
Subject: [New-work] WG Review: Recharter of Mobility for IPv4 (mip4) 

A modified charter has been submitted for the Mobility for IPv4 (mip4)
working group in the Internet Area of the IETF.  The IESG has not made
any determination as yet. The modified charter is provided below for
informational purposes only.
Please send your comments to the IESG mailing list ( by
July 3rd.


Mobility for IPv4 (mip4)

Current Status: Active Working Group

Peter McCann <>
Henrik Levkowetz <>

Internet Area Director(s):
Jari Arkko <>
Mark Townsley <>

Internet Area Advisor:
Jari Arkko <>

Mailing Lists:
General Discussion:
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In Body: subscribe

Description of Working Group:

IP mobility support for IPv4 nodes (hosts and routers) is specified in
RFC3344. RFC 3344 mobility allows a node to continue using its
"permanent" home address as it moves around the Internet. The Mobile IP
protocols support transparency above the IP layer, including maintenance
of active TCP connections and UDP port bindings.Besides the basic Mobile
IPv4 (MIPv4) protocols, several other drafts deal with concerns such as
optimization, security, extensions, AAA support, and deployment issues.

MIPv4 is currently being deployed on a wide basis (e.g., in cdma2000
networks). The scope of the deployment is on a fairly large scale and
accordingly, the MIP4 WG will focus on deployment issues and on
addressing known deficiencies and shortcomings in the protocol that have
come up as a result of deployment experience. Specifically, the working
group will complete the work items to facilitate interactions with AAA
environments, interactions with enterprise environments when
MIPv4 is used therein, and updating existing protocol specifications in
accordance with deployment needs and advancing those protocols that are
on the standards track.

Work expected to be done by the MIP4 WG as proposed by this charter is
as follows:

1. MIPv4 has been a proposed standard for several years. It has been
adopted by other standard development organizations and has been
deployed commercially. One of the next steps for the WG is to advance
the protocol to draft standard status. As part of advancing base Mobile
IP specs to DS, the MIPv4 NAI RFC (2794) will be revised to reflect
implementation experience

2. Work items that are pending from the previous Mobile IP WG, which
will be completed by the MIP4 WG, are:

- completion of the MIB for the revised base Mobile IP specification

- regional registration draft.

3. The MIP4 WG will also complete the work on MIPv4 interactions in VPN
scenarios. This work will involve identifying the requirements and a
solution development for MIPv4 operation in the presence of IPsec VPNs.

4. Additionally, a proposal has been made for how MOBIKE could work
together with MIPv4. This proposal does not describe any new protocol,
but formulates a best current practice for deploying MOBIKE together
with MIPv4. The working group will adopt and complete this document.

5. Some issues have been raised with respect to RFC3519. These will be
identified and addressed as appropriate, through errata, revision of RFC
3519, and/or supplemental documents as needed.

6. It has been proposed that the FMIP protocol, which has been
standardised for MIPv6 in the MIPSHOP working group, should also be
published as an experimental protocol for MIPv4. A draft for this
exists. The working group will take up and carry this work forward to

7. An extension to carry generic strings in the Registration Reply
message has been proposed. The purpose is to supply supplemental
human-readable information intended to the MN user. The working group
will complete the specification and applicability statement of such an

8. RADIUS attributes for MIP4. A set of RADIUS attributes has been
proposed for MIPv4.

The working group will first produce a requirements specification,
describing how the work differs from the requirements in RFC 2977 and
the functionality provided by RFC 4004 (the MIPv4 Diameter App).
The reason why this first step is required is that RFC 3127 pretty
clearly shows that full 2977 functionality can't be provided by even a
considerably extended RADIUS, so we need to match the requirements to
what can be done within RADIUS.

Provided the requirements work finds approval with ADs and radext, the
workgroup will complete the specification of MIPv4 RADIUS attributes,
solicit feedback from the Radius Extensions WG, adjust, and submit this
for publication.

9. MIPv4 Extension for Configuration Options.

Several drafts have proposed extensions to help improve configuration of
MIPv4 clients. The latest proposal is for a general configuration option
extension which could carry information such as e.g., DNS address and
DHCP server address. The working group will take on and complete one
proposal for a configuration option extension.

10. Dual-stack Support

There have been several proposals for how to enable an IPv6 connection
over a network that supports Mobile IPv4. The basic idea is to include
an IPv6 address in the Mobile IPv4 signaling messages. The working group
will take on and complete one proposal for IPv6 over Mobile IPv4.

Goals and Milestones:

Done AAA Keys for MIPv4 to IESG
Done MIPv4 VPN interaction problem statement to IESG Done Low latency
handover to experimental Done Experimental MIPv4 message and extensions
draft to IESG Done Dynamic Home Agent assignment protocol solution to
IESG Done Revised MIPv4 Challenge/Response (3012bis) to IESG Done
Regional registration document to IESG Jul 2006 MIPv4 Mobike interaction
(BCP) to the IESG Jul 2006 MIPv4 VPN interaction (BCP) to the IESG Jul
2006 RADIUS Extensions for MIPv4 to the RADEXT WG for comment Jul 2006
Generic Strings for MIPv4 (Proposed Std.) to the IESG Aug 2006 Revised
MIPv4 specification to IESG for Draft Std.
Aug 2006 MIPv4 Extension for Config. Options (Proposed Std.) to the IESG
Sep 2006 FMIPv4 (Experimental) to the IESG Sep 2006 MIPv4 RADIUS
Extensions Requirements to the IESG Sep 2006 RADIUS Extensions for MIPv4
(Proposed Std.) to the IESG Nov 2006 Revised rfc2794bis (NAI extension)
(Draft Std.) to the IESG Dec 2006 Revised MIB for MIPv4 (Proposed Std.)
to IESG Dec 2006 Dual-stack MIPv4 (Proposed Std.) to IESG

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