CURRENT_MEETING_REPORT_



Reported by Steve Deering/Xerox PARC

MOSPF Minutes

Agenda


  1. Review John Moy's draft specification of March 4.

  2. Discuss outstanding issues:

       o Inter-area delivery trees
       o Inter-AS delivery trees
       o Multicast group scope


  3. What next?
       o Progress of specification
       o Implementations?
       o Testing?


Minutes

Most of the meeting was spent on Agenda Item 1, a page-by-page review of
John's latest spec.  We agreed to one significant change:  to merge the
separate concepts of the ``SPF cache'' and the ``forwarding cache'', and
to refer to the ``local group cache'' as something other than a
``cache'', perhaps a ``list'' or ``table''.  There were also a number of
minor or editorial changes suggested, that John will incorporate in the
next draft.

Under Agenda Item 2, we discussed (again) the alternatives for
inter-area and inter-AS routing.  The group agreed to the inter-area
scheme proposed by John, which is based on RPF for identifying entry
routers, but using FPF within an area.  The inter-AS approach, however,
remained unclear, pending decisions by the BGP Working Group, which is
considering a number of proposals by Scott Brim.  Steve and Scott also
described a couple of proposals for adding some sort of scope limits to
group memberships (orthogonal to the use of TTL for scope of multicast
transmissions); possibilities include a scope subfield within an IP
multicast address, or a separate scope parameter in the Join Group
operation (and in the resulting IGMP message).  This remains a topic for
future consideration.

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For Agenda Item 3, John agreed to incorporate the suggested changes and
to flesh out the missing sections of the spec, except for those parts
dealing with inter-AS routing, and to make the document available as an
internet draft.  Scott and Jeff Honig at Cornell are planning to
implement the OSPF multicast extensions within ``gated'' as time and
resources permit.

Attendees

William Babson           bill%penril@uunet.UU.NET
Scott Brim               swb@devvax.tn.cornell.edu
Rob Coltun               rcoltun@trantor.umd.edu
Steve Deering            deering@xerox.com
Barbara Denny            denny@sri.com
Kurt Dobbins             dobbins@ctron.com
Dino Farinacci           dino@3com.com
Dennis Ferguson          dennis@canet.ca
Jeffrey Honig            jch@devvax.tn.cornell.edu
Anders Klemets           klemets@cs.cmu.edu
Michelle Landriault      crm57a@bnr.ca
Bill Manning             bmanning@houston.sc.ti.com
Greg Minshall            minshall@wc.novell.com
John Moy                 jmoy@proteon.com
Gary Mussar              mussar@bnr.ca
David O'Leary            oleary@sura.net
Steven Sherry            shsherry@eng.xyplex.com
Stephen Shew             sdshew@bnr.ca
Frank Solensky           solensky@clearpoint.com
Paul Tsuchiya            tsuchiya@bellcore.com
Osmund deSouza           desouza@osdpc.ho.att.com



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