CURRENT_MEETING_REPORT_

Reported by Steve Deering/ Stanford

Minutes:

This was the second meeting of the Multicast OSPF Working Group.

Steve Deering gave a short presentation on the cost and scaling aspects
of IGMP (the Internet Group Management Protocol, specified in RFC-1112)
and of link-state multicast routing as planned for OSPF. [See the
accompanying slides.]

John Moy presented an outline of the changes and additions required to
the current OSPF specification, to support multicast routing.
Discussion of his outline identified some new concerns and suggestions
regarding:


   o support for multicast routing by only a subset of routers in an
     area and its effect on multicast vs.  unicast reachability,
     selection of designated routers, etc.
   o duplicate multicast packets arising from the support of multiple IP
     subnets on a single physical network.
   o inter-area and inter-AS multicast routing approaches.


It was also pointed out that we will have to come up with formal MIB
definitions covering the additional state and configuration variables
introduced for multicast routing.  No one immediately volunteered for
that job.

Action Items

John Moy to generate a draft of the multicast changes/additions to the
OSPF specification.

Next Meeting

The Multicast OSPF Working Group will next meet in Vancouver, at the
July/August IETF meeting.



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ATTENDEES

    Steven Bruniges
    Duane Butler              dmb@network.com
    George Clapp              meritec!clapp@bellcore.bellcore.com
    Rob Coltun                rcoltun@umds.umd.edu
    Steve Deering             deering@pescadero.stanford.edu
    Martin Gross              gross@polaris.dca.mil
    Keith Hogan               keith%penril@uunet.uu.net
    Jeff Honig                jch@tcgould.tn.cornell.edu
    Joseph C Lawrence         jcl@sabre.bellcore.com
    Yoni Malachi              yoni@cs.stanford.edu
    Tony Mason                mason@transarc.com
    Jeff Mogul                mogul@decwrl.dec.com
    John Moy                  jmoy@proteon.com
    Stephanie Price           cmcvax!price@hub.ucsb.edu
    Jim Showalter             gamma@mintaka.dca.mil
    Michael St. Johns         stjohns@umd5.umd.edu
    Brad Strand               bstrand@cray.com
    Kannan Varadhan           kannan@oar.net
    Steven Willis             swillis@wellfleet.com
    Chin Yuan                 cyuan@srv.pacbell.com



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