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. 1 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 2