The only info I've gotten that may be related concerned using Cisco CGMP vs. IGMP snooping on switches connected to edge routers. Using IGMP fixed their problems. I am using a 2950 switch which only supports IGMP and it is enabled and configured correctly by default. Haven't gotten any info from BNL (Tameka) about their configuration.
Another couple of notes, now video is freezing on both sides, but both sides can join other sessions (the lobby, etc...) with no problems. The other point is that we have never had any multicast issues and nothing in our network has changed. Mike ----- Original Message ----- From: "Masullo, Chris F" <masu...@bnl.gov> To: "'Mike Weaver'" <wea...@er.doe.gov> Sent: Monday, April 26, 2004 13:23 Subject: RE: [AG-TECH] Periodic freezing > Mike, > > Did you get any feed back? > We are seeing a good multicast signal on the GRID network. > Tamika sad something about CGMP/IGMP but was not clear as > to what. > > -----Original Message----- > From: owner-ag-t...@mcs.anl.gov [mailto:owner-ag-t...@mcs.anl.gov] On Behalf > Of Mike Weaver > Sent: Monday, April 26, 2004 11:36 AM > To: ag-t...@mcs.anl.gov > Subject: [AG-TECH] Periodic freezing > > > Has anyone experienced periodic freezing of video & audio for short > periods of time (~1 minute) in one direction only? > > I'm currently in a 2 site, AG 2.x-only meeting and we see and hear the > other site fine. Our video and audio seem fine to us, but periodically > freeze as seen by the other site. vic & RAT show no loss, and the > multicast beacon looks fine. We were originally in a secure session on > the NCSA venue server, but moved to an open session on the ANL venue > server to see if it was related to either the encryption or a particular > venue server. No difference. > > Anyone ever see this and come up with a cause/fix? Ideas welcome! I'm > getting heated questions from presidential appointees! Telling them > that AG is a research project usually doesn't cut it. Also can't say > that holding high-level, business meetings over a research network using > a research application may not be the best idea. > > Thanks, > > Mike > > -- > Mike Weaver > Sr. Network Administrator > SC-31/Germantown Building > US Department of Energy > 1000 Independence Avenue, SW > Washington, D.C. 20585-1290 > Voice: 301-903-0072 > Fax: 301-528-2701 > Email: wea...@er.doe.gov
