CURRENT_MEETING_REPORT_ Reported by Tony Ballardie/University College London Minutes of the Inter-Domain Multicast Routing Working Group (IDMR) The 27th IETF meeting in Amsterdam was the first official meeting of the IDMR Working Group. The working group met over two 2-hour sessions. During the first session, Deborah Estrin gave a presentation on ESL (work done in collaboration with Steve Deering, Dino Farinacci, and Van Jacobson), one of the new proposals for inter-domain multicast routing. The motivation behind the design of ESL was, for groups with a relatively small number of senders (sources), to allow receivers to receive data from those sources either over a shared tree, or over a shortest-path tree rooted at the source. The latter is useful for applications requiring minimal delay between senders and receivers. It was agreed that, because ESL is in its early stages of development, there remains specification and engineering details that need to be resolved. The second session was mostly dedicated to discussing the IDMR charter. It was unanimously agreed that the current charter is lacking with respect to many aspects of inter-domain multicasting, and it should be a goal of the working group to try to resolve many of these, for example, user group management and interoperability. The conclusion of this discussion was that the charter should be re-worked and re-submitted to the Routing Area Director after the items to be worked on have been enumerated in order of priority. Attendees Toshiya Asaba asaba@iij.ad.jp Cynthia Bagwell cbagwell@gateway.mitre.org Dennis Baker dbaker@wellfleet.com Tony Ballardie A.Ballardie@cs.ucl.ac.uk Stefan Braun smb@cs.tu-berlin.de Michael Brescia brescia@bbn.com John Burnett jlb@adaptive.com Walid Dabbous Walid.Dabbous@sophia.inria.fr Stephen Deering deering@parc.xerox.com Ed Ellesson ellesson@vnet.ibm.com Hans Eriksson hans@sics.se Julio Escobar jescobar@bbn.com Deborah Estrin estrin@usc.edu Dino Farinacci dino@cisco.com Dennis Ferguson dennis@ans.net Osten Franberg euaokf@eua.ericsson.se Paul Francis Francis@thumper.bellcore.com 1 Susan Hares skh@merit.edu Robert Hinden hinden@eng.sun.com Christian Huitema Christian.Huitema@sophia.inria.fr John Larson jlarson@parc.xerox.com David Marlow dmarlow@relay.nswc.navy.mil Jun Matsukata jm@eng.isas.ac.jp Gerry Meyer gerry@spider.co.uk Ronny Nilsen Ronny.Nilsen@usit.uio.no David O'Leary doleary@cisco.com Jorg Ott jo@cs.tu-berlin.de James Reeves jreeves@synoptics.com Benny Rodrig brodrig@rnd-gate.rad.co.il Tim Seaver tas@concert.net Ed Stern els@proteon.com John Stewart jstewart@cnri.reston.va.us Fumio Teraoka tera@csl.sony.co.jp Thierry Turletti turletti@sophia.inria.fr Werner Vogels werner@inesc.pt Jost Weinmiller jost@prz.tu-berlin.d400.de 2