Network-based Localized Mobility Management (netlmm)

In addition to this official charter maintained by the IETF Secretariat, there is additional information about this working group on the Web at:

       Additional NETLMM Page

Last Modified: 2008-08-21

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

Chair(s):

  • Vidya Narayanan <vidyan@qualcomm.com>

  • Jonne Soininen <jonne.soininen@nsn.com>

    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: netlmm@ietf.org
    To Subscribe: http://www1.ietf.org/mailman/listinfo/netlmm
    In Body: to subscribe
    Archive: http://www1.ietf.org/mail-archive/web/netlmm/current/index.html

    Description of Working Group:

    The IETF has defined both local and global mobility management
    protocols that are intended to handle IP mobility for nodes. All IP
    mobility management protocols defined thus far require the involvement
    of the mobile node in order to accomplish mobility. This working
    group is tasked with defining a network-based local mobility
    management protocol, where local IP mobility is handled without
    involvement from the mobile node. The idea is that the mobile node
    may move across multiple access routers without encountering a change
    in its IP address, thereby hiding the mobility from the IP layer and
    above.

    As part of the first phase of efforts in this working group, a
    protocol for such network-based local mobility has been developed.
    This protocol, Proxy Mobile IPv6 (PMIPv6), has been developed based on
    Mobile IPv6, after considering other alternative approaches. With
    this protocol, unmodified IP nodes may change access routers without
    having to change the IP address on an interface, within a given
    administrative domain. This is accomplished by having Mobile Access
    Gateways (MAGs), often part of the access routers in a network, send
    binding updates on behalf of mobile nodes attached to them, to a Local
    Mobility Anchor (LMA). The LMA manages the mobility of the mobile
    nodes across the MAGs within a given PMIPv6 domain.

    The PMIPv6 protocol is being adopted as part of several wide-area
    wireless network (e.g., 3GPP, 3GPP2, WiMAX) and local area network
    environments. The current charter of this working group involves
    specification of some necessary features that make the deployment of
    this protocol feasible in these various environments.

    As part of this effort, it is essential to support mobility for IPv4
    end nodes. Some means of dealing with overlapping private IPv4
    addresses of mobile nodes and supporting separation of flows between
    the MAG and LMA is also required. Further, given that local and
    global mobility management protocols are likely to be deployed in some
    combination in various environments, it is necessary to clearly define
    the interactions between PMIPv6 and MIPv6. Interactions with AAA
    protocols such as RADIUS and Diameter may be required for
    authorization or provisioning purposes. When multiple LMAs are
    present, an automated LMA discovery mechanism may be needed to
    facilitate deployment. The above items are in scope of the current
    charter.

    The MAG and LMA are considered to be IPv6 capable for all efforts of
    this protocol. Also, all features defined must work with unmodified
    IP nodes. Specifying any changes to mobile nodes is out of scope of
    the current charter. Handoff and route optimizations are also out of
    scope. There is, however, considerable interest in optimization work,
    for instance, and a future recharter of this working group is likely
    to address this in some manner.

    NETLMM WG Deliverables
    ----------------------

    1) Interface between a PMIPv6 MAG and MN: This interface will define
    the interaction between a regular IP node and a MAG that will be used
    to trigger various mobility management actions on the MAG. This is
    necessary for the MAG to properly trigger binding updates to the LMA
    and create appropriate mobility management state.

    2) IPv4 Support for PMIPv6: This will define the support for IPv4
    nodes in PMIPv6. This will also define the protocol operation over an
    IPv4 transport between the MAG and LMA, by employing protocol extensions
    already developed in the MEXT WG.

    3) Interactions between Mobile IPv6 and Proxy Mobile IPv6: This will
    highlight the interactions required between these protocols in various
    methods of co-existence of these in a system, with a view to
    documenting the best practices to be used. The scenarios considered
    will include a hierarchical model of local and global mobility
    management using PMIPv6 and MIPv6 respectively, a mixed mode of the
    two with some nodes supporting MIPv6 and others not, and the use of
    MIPv6 upon movement of nodes outside a PMIPv6 domain.

    4) GRE Keying option for PMIPv6: This will define a mechanism using
    GRE keys to support separation of flows between a MAG and LMA.

    5) RADIUS support for PMIPv6: This will define the interactions
    between RADIUS and PMIPv6 to support policy provisioning and
    authorization.

    6) Automatic LMA discovery: This will define the ability for MAGs to
    automatically discover and use an LMA within a PMIPv6 domain. The
    scope of this effort may include specifying the use of DNS or DHCP
    based LMA discovery or LMA discovery using policy information
    retrieved via AAA protocols.

    7) MIB for PMIPv6: This will define the MIB for the protocol for
    interoperability purposes.

    8) PMIPv6 path management and failure detection: This will define
    an extension to the PMIPv6 protocol allowing PMIPv6 peers to
    verify bidirectional reachability with their peer, detect
    failure of their peer, and signal their own failure to their
    peer.

    Goals and Milestones:

    Done  Charter Working Group
    Done  Working Group Last Call on Problem Statement and Requirements documents
    Done  Discuss Last Call comments on Problem Statement and Requirements documents
    Done  Submit Problem Statement and Requirements documents to IESG for publication as Informational RFCs
    Done  Working Group Last Call on Threat Model documents. Submit Threat Model document to SAAG for review
    Done  Working Group Last Call on Threat Model document
    Done  IETF 66, Discuss Last Call comments on Threat Model document
    Done  Submit Threat Model document to IESG for publication as an Informational RFC
    Done  Main protocol decision completed
    Done  Initial version of the Protocol draft submitted
    Done  Working Group Last Call on Mobile Node to Access Router document
    Aug 2008  Initial version of the PMIP6-MIP6 Interactions document
    Aug 2008  Working Group Last Call on the IPv4 support document
    Aug 2008  Initial version of GRE keying document
    Aug 2008  Working Group Last Call on MAG-MN Interface document
    Oct 2008  Initial version of RADIUS support document
    Oct 2008  Submit IPv4 support and MAG-MN Interface documents for AD review
    Oct 2008  Initial version of path management document
    Nov 2008  Working Group Last Call on the PMIP6-MIP6 Interactions document
    Nov 2008  Working Group Last Call on GRE Keying document
    Nov 2008  Initial version of LMA Discovery document
    Nov 2008  Initial version of the MIB document
    Dec 2008  Working Group Last Call on path management document
    Jan 2009  Submit PMIP6-MIP6 Interactions document for AD review
    Jan 2009  Submit GRE Keying document for AD review
    Jan 2009  Working Group Last Call on RADIUS support document
    Jan 2009  Submit path management document for AD review
    Mar 2009  Submit RADIUS support document for AD review
    Mar 2009  Working Group Last Call on LMA Discovery document
    Mar 2009  Working Group Last Call on the MIB document
    May 2009  Submit LMA Discovery document for AD review
    May 2009  Submit the MIB document for AD review
    Jul 2009  Re-charter

    Internet-Drafts:

    IPv4 Support for Proxy Mobile IPv6 (92757 bytes)
    GRE Key Option for Proxy Mobile IPv6 (34261 bytes)

    Request For Comments:

    Security Threats to Network-Based Localized Mobility Management (NETLMM) (RFC 4832) (31467 bytes)
    Goals for Network-based Localized Mobility Management (NETLMM) (RFC 4831) (35232 bytes)
    Problem Statement for Network-based Localized Mobility Management (NETLMM) (RFC 4830) (29815 bytes)
    Proxy Mobile IPv6 (RFC 5213) (226902 bytes)
    IETF Secretariat - Please send questions, comments, and/or suggestions to ietf-web@ietf.org.

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