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%[email protected]
Scott Brim               [email protected]
Rob Coltun               [email protected]
Steve Deering            [email protected]
Barbara Denny            [email protected]
Kurt Dobbins             [email protected]
Dino Farinacci           [email protected]
Dennis Ferguson          [email protected]
Jeffrey Honig            [email protected]
Anders Klemets           [email protected]
Michelle Landriault      [email protected]
Bill Manning             [email protected]
Greg Minshall            [email protected]
John Moy                 [email protected]
Gary Mussar              [email protected]
David O'Leary            [email protected]
Steven Sherry            [email protected]
Stephen Shew             [email protected]
Frank Solensky           [email protected]
Paul Tsuchiya            [email protected]
Osmund deSouza           [email protected]



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