Mobility EXTensions for IPv6 (mext) ----------------------------------- Charter Last Modified: 2007-11-26 Current Status: Active Working Group Chair(s): Julien Laganier Marcelo Bagnulo Internet Area Director(s): Jari Arkko Mark Townsley Internet Area Advisor: Jari Arkko Mailing Lists: General Discussion:mext@ietf.org To Subscribe: https://www1.ietf.org/mailman/listinfo/mext Archive: http://www1.ietf.org/mail-archive/web/mext/current Description of Working Group: Mobile IPv6 specifies routing support which permits an IPv6 host to continue using its home address as it moves around the Internet, enabling continuity of sessions. Mobile IPv6 supports transparency above the IP layer, including maintenance of active transport level sessions. In addition, network mobility (NEMO) mechanisms built on top of Mobile IPv6 allow managing the mobility of an entire network, as it changes its point of attachment to the Internet. The base specifications consist of: o RFC 3775 (Mobile IPv6) o RFC 3963 (NEMO) o RFC 4877 (Mobile IPv6 Operation with IKEv2) The MEXT Working Group continues the work of the former MIP6, NEMO, and MONAMI6 Working Groups. The primary goal of MEXT will be to (A) enhance base IPv6 mobility by continuing work on developments that are required for wide-scale deployments and specific deployment scenarios. Additionally, (B) the working group will ensure that any issues identified by implementation and interoperability experience are addressed, and that the base specifications are maintained. (C) The group will also produce informational documentation, such as design rationale documents or description of specific issues within the protocol. Deployment considerations call for (A.1) solutions to enable dual-stack operation, (A.2) mechanisms to support high-availability home agents, (A.3) allowing the use of multiple interfaces in mobile nodes, (A.4) ways to employ Mobile IPv6 in the presence of firewalls, (A.5) address the specific needs of automotive and aviation communities for route optimisation in network mobility, and (A.6) support for AAA is needed as a continuation of earlier work on bootstrapping. Work items related to large scale deployment include: (A.1) A Solution for Mobile IPv6 and NEMO session continuity for dual stack hosts which attach to IPv4 access networks. Additionally provide a mechanism for carrying IPv4 packets via the Home agent for Mobile IPv6 or NEMO capable dual-stack hosts. (A.2) A protocol based solution for enhancing the reliability of home agents and a method to force a host/router to switch home agents. A mechanism to force an MN to switch the HA that is currently serving it. This is required in deployments where the HA needs to be taken offline for maintenance. (A.3) Use of multiple interfaces. Today, the protocols do not provide suppport for simultaneous differentiated use of multiple access technologies. Several proposals exist for such support, and some of them have been implemented and tested. When a mobile host/router uses multiple network interfaces simultaneously, or when multiple prefixes are available on a single network interface, the mobile host/router would end up with multiple Care-of Addresses (CoAs). In addition, the Home Agent might be attached to multiple network interfaces, or to a single network interface with multiple prefixes, hence resulting in the option to use multiple IP addresses for the Home Agent. This could result in the possibility of using a multitude of bi-directional tunnels between pairs of {Home Agent address, CoA} and a number of associated issues: establishment, selection and modification of multiple simultaneous tunnels. The objective of the WG is to produce a clear problem statement and to produce standard track specifications to the problems associated with the simultaneous use of multiple addresses for either mobile hosts using Mobile IPv6 or mobile routers using NEMO Basic Support and their variants (FMIPv6, HMIPv6, etc). Where the effects of having multiple prefixes on a single interface is identical to the effects of having multiple interfaces each with a single prefix, the WG will consider a generalized approach to cater for multiple prefixes available to a mobile host/router. The WG uses existing tunneling mechanisms defined for Mobile IPv6. The involved nodes need to select which tunnel instance to use when multiple ones are available due to multiple addresses on either end. But the WG does not plan to define a new mechanism for this, but rather document how to use existing mechanisms based upon preferences or policies. In particular, the WG will consider that a tunnel is alive as long as packets can be exchanged with the corresponding peer. In addition, local information, such as interface up/down events, or other failure detection mechanisms can be used to quickly detect failure of tunnel(s). Goals and Milestones: Done Submit I-D 'Mobile IPv6 Vendor Specific Option' to IESG for publication as a Proposed Standard Dec 2007 Submit I-D 'Mobile IPv6 Dual-Stack Operation' to IESG for publication as a Proposed Standard. Dec 2007 Submit I-D 'Motivation for Authentication I-D' to IESG for publication as Informational. Dec 2007 Submit Multiple CoA Registration to IESG Done Submit I-D 'Mobile IPv6 Experimental Allocations' to IESG for publication as a Proposed Standard Feb 2008 Submit I-D 'Goals for AAA HA Interface' to IESG for publication as Informational. Feb 2008 Submit -00 draft on Route Optimization needs for Personal Mobile Router Feb 2008 Submit -00 draft on Route Optimization Needs for Automobile and Highway Deployments Feb 2008 Submit -00 draft on Route Optimization Needs for Aircraft and Spacecraft Deployments Mar 2008 Submit the final doc on Prefix Delegation for NEMO to the IESG, for Proposed Standard Done Submit I-D 'Mobility Header Home Agent Switch Message' to IESG for publication as a Proposed Standard May 2008 Submit final doc on Route Optimization needs for Personal Mobile Router, for Informational May 2008 Submit final doc on Route Optimization Needs for Automobile and Highway Deployments, for Informational May 2008 Submit final doc on Route Optimization Needs for Aircraft and Spacecraft Deployments, for Informational May 2008 Submit -00 draft for solution to aircraft/spacecraft problem Jun 2008 Determine how to proceed with remaining automotive/Personal Mobile Router solutions Jun 2008 Submit the I-D 'RADIUS Mobile IPv6 Support' to IESG for publication as a proposed standard. Jul 2008 Submit Analysis of the use of Multiple Simultaneous Care-of Addresses and Home Agent addresses, for Informational Jul 2008 Submit Multiple Interfaces Motivations and Scenario to IESG, for Informational Aug 2008 Submit I-D 'Mobile IPv6 Operation with Firewalls' to IESG for publication as Informational. Aug 2008 Submit the final doc on MIB for NEMO Basic Support to the IESG, for Proposed Standard Oct 2008 Submit Flow/binding policy transport to IESG, for Proposed Standard Oct 2008 Submit Flow/binding policy format to IESG, for Proposed Standard Nov 2008 Submit final doc for solution to aircraft/spacecraft problem to the IESG, for Proposed Standard Nov 2008 Recharter to work on the remaining automotive/Personal Mobile Router solutions Dec 2008 Submit I-D(s) related to specific updates and corrections of RFC 3775 to IESG for publication as Proposed Standard. Dec 2008 Submit I-D 'Home agent reliability' to IESG for publication as a Proposed Standard. Internet-Drafts: Posted Revised I-D Title ------ ------- -------------------------------------------- Aug 2005 Aug 2007 Mobile Network Prefix Delegation Oct 2005 Nov 2007 Mobile IPv6 support for dual stack Hosts and Routers (DSMIPv6) Feb 2006 Nov 2007 Analysis of Multihoming in Mobile IPv6 Jun 2006 Jan 2008 Multiple Care-of Addresses Registration Jun 2006 Nov 2007 Home Agent Reliability Protocol Oct 2006 Nov 2007 RADIUS Mobile IPv6 Support Oct 2007 Oct 2007 Generic Notification Message for Mobile IPv6 Dec 2007 Dec 2007 NEMO Route Optimization Requirements for Operational Use in Aeronautics and Space Exploration Mobile Networks Dec 2007 Dec 2007 AAA Goals for Mobile IPv6 Jan 2008 Jan 2008 Mobile IPv6 support for dual stack Hosts and Routers (DSMIPv6) Request For Comments: None to date.