A modified charter has been submitted for the Mobility Extensions (netext) 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 (iesg@ietf.org) by Tuesday, January 26, 2010. This update of the NETEXT working group's charter involves adding work items related to cross-interface handover and flow mobility that were discussed in the NETEXT2 BOF but not adopted by the IETF. After discussions in the NETEXT WG meeting in Hiroshima, a significantly reduced scope for the work was adopted, and this work is now being added to the charter. In addition, one work item on RADIUS support moves from the NETLMM WG to this WG. The differences to the current charter can be seen at http://www.arkko.com/ietf/netext/recharter_new_jari2-from-old.diff.html Mobility Extensions (netext) ---------------------------- Last Modified: 2010-01-19 Current Status: Active Working Group Additional information is available at tools.ietf.org/wg/netext Chair(s): * Rajeev Koodli <rkoodli@starentnetworks.com> * Basavaraj Patil <basavaraj.patil@nokia.com> Internet Area Director(s): * Ralph Droms <rdroms@cisco.com> * Jari Arkko <jari.arkko@piuha.net> Internet Area Advisor: * Jari Arkko <jari.arkko@piuha.net> Mailing Lists: General Discussion: netext@ietf.org To Subscribe: https://www.ietf.org/mailman/listinfo/netext Archive: http://www.ietf.org/mail-archive/web/netext/current/maillist.html Description of Working Group: Proxy Mobile IPv6, specified in RFC 5213, is a network-based mobility protocol. It uses a Mobile Access Gateway (MAG) and a Local Mobility Anchor (LMA) to allow hosts to move around within a domain while keeping their address or address prefix stable. Proxy Mobile IPv6 has been incorporated into a number of products and deployments are starting. Certain deployment considerations, including localized routing and bulk refresh of lifetime are already emerging. The working group will focus on the following topics relevant for network-based mobility: Localized Routing: a specification for routing traffic between the MAG(s) without involving the LMA. That is, allow the MAGs to route traffic between hosts from one MAG to another, without being tunneled all the way to the LMA. This reduces latency and backhaul load. Applications such as voice can benefit from the reduced latency. Bulk Refresh: a specification of improving the signaling load for binding lifetime refresh. The current specifications call for the handling of each mobility session independent of each other. When a large number of hosts are served by a single MAG, a periodic refresh of the binding lifetimes can lead to a signaling storm. The purpose of the Bulk Refresh feature is to construct a protocol feature that allows such refreshes to occur on a per-MAG basis. LMA Redirection: a specification for allowing an LMA to redirect a MAG to another LMA. This is primarily needed as a way to perform load balancing. This functionality is complementary to implementation techniques that allow distributed MAG implementations to move tasks around without a visible impact at the protocol level, and the initial LMA discovery work in the NETLMM WG. An applicability statement describing the situations where the new functionality is or is not applicable has to be included in the specification. Hiding access technology changes from host IP layer: Proxy mobility is based on the assumption that changes in host IP stacks are undesirable. However, link layer implementations can hide the actually used physical interfaces from the IP stack. For instance, a single interface might transmit packets over different media, as is common practice in certain radio networks. This can be used to achieve inter-access handovers or flow mobility, i.e., the movement of selected flows from one access technology to another. The specification of any actual link layer mechanisms is outside the scope of the working group, but the group works on the following: - Informational applicability statement that analyzes the issues involved with this approach and characterizes the contexts in which such use is or is not appropriate. - The working group will determine if protocol extensions are required between the Proxy Mobile IPv6 network nodes (MAGs and LMAs) to support the ability for a single host interface to transmit packets over different media and the ability to distribute specific traffic flows on different media components of that single interface. The relevant protocol extensions will be developed as necessary. The WG will assume that there the host has an interface that is capable of employing multiple media. Radius Extensions to PMIP6: In order to enable network based mobility using PMIP6, the policy profile needs to signal a set of attributes and policies to the MAG and LMA. New Radius attributes need to be specified that are relevant to PMIP6 based mobility. This work item will specify Radius extensions and attributes specific to PMIP6. The work in this charter is entirely internal to the network and does not affect host IP stack operation in any way (except perhaps through impacting packet forwarding capacity visible to the hosts). The working group is not allowed to specify new IP layer protocol mechanisms to signal mobility related events between the host and the network. The proposed activity will be complementary to the existing IETF Working Groups, notably the NETLMM and MEXT WGs. The NETEXT working group will also act as the primary forum where new extensions on top of the Proxy Mobile IPv6 protocol can be developed. The addition of such new extensions to the working group involves addition of the extension to this charter through the normal rechartering process. Goals and Milestones: May 2009 WG chartered Jul 2009 Initial WG draft on Bulk Refresh Jul 2009 Decision on the inclusion of possible additional work items Sep 2009 Initial WG draft on LMA Redirection Sep 2009 Initial WG draft on Localized Routing Dec 2009 Submit Bulk Refresh to IESG for publication as a Proposed Standard RFC Jan 2010 Submit LMA Redirection to IESG for publication as a Proposed Standard RFC Mar 2010 Initial WG document on RADIUS extensions to PMIP6 Apr 2010 Submit Localized Routing to IESG for publication as a Proposed Standard RFC May 2010 Initial WG document on Applicability Statement on Multiple Media on One Interface Jun 2010 WG decision on what Proxy Mobile IPv6 support is needed to support multiple media on one interface Sep 2010 Initial WG document(s) on Proxy Mobile IPv6 Extensions to Support Multiple Media on One Interface Oct 2010 Submit RADIUS extensions to PMIP6 to IESG for publication as a Proposed Standard Dec 2010 Submit Applicability Statement on Multiple Media on One Interface to IESG for publication as Informational RFC Feb 2011 Submit Proxy Mobile IPv6 Extensions to Support Multiple Media on One Interface for publication as Proposed Standard RFC(s) _______________________________________________ IETF-Announce mailing list IETF-Announce@ietf.org https://www.ietf.org/mailman/listinfo/ietf-announce
