Mobility EXTensions for IPv6 (mext)

Last Modified: 2007-11-26

Additional information is available at tools.ietf.org/wg/mext

Chair(s):

  • Julien Laganier <julien.ietf@laposte.net>

  • Marcelo Bagnulo <marcelo@it.uc3m.es>

    Internet Area Director(s):

  • Jari Arkko <jari.arkko@piuha.net>
  • Mark Townsley <townsley@cisco.com>

    Internet Area Advisor:

  • Jari Arkko <jari.arkko@piuha.net>

    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:

    Mobile Network Prefix Delegation (42581 bytes)
    Mobile IPv6 support for dual stack Hosts and Routers (DSMIPv6) (74650 bytes)
    Analysis of Multihoming in Mobile IPv6 (68674 bytes)
    Multiple Care-of Addresses Registration (87213 bytes)
    Home Agent Reliability Protocol (106425 bytes)
    RADIUS Mobile IPv6 Support (87715 bytes)
    Generic Notification Message for Mobile IPv6 (20594 bytes)
    NEMO Route Optimization Requirements for Operational Use in Aeronautics and Space Exploration Mobile Networks (68378 bytes)
    AAA Goals for Mobile IPv6 (25219 bytes)
    Mobile IPv6 support for dual stack Hosts and Routers (DSMIPv6) (82582 bytes)
    NEMO Management Information Base (73968 bytes)
    Automotive Industry Requirements for NEMO Route Optimization (56026 bytes)

    No Request For Comments

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