[AG-TECH] AG Connector

John I Quebedeaux Jr johnq at lsu.edu
Thu Oct 27 19:21:32 CDT 2005


When you unicast - are you doing it with NCSA's venues and bridge?  
Lately there seem to be some issues with multicast and bridging via  
NCSA's network. The problem you're describing with unicast does seem  
about right from what i've seen and may not be a problem with your  
site at all.

What you might consider is doing that test again on another venue  
server with a bridge where multicast is working to your test site(s).  
LSU's lobby if off the NCSA World venue/lobby and has a bridge, but i  
can not guarantee that multicast is working to all sites. We AG with  
many sites (several overseas) where multicast works - our neighbors  
along the south have no trouble with us either, but this week I know  
that there are one or two sites that could not see us in the north east.

I'm running a beaconhere: hostname--> venues.lbrn.lsu.edu). See:  
http://beacon.dast.nlanr.net from that exact venueserver for  
comparisons if needed.

For the AG connector - from what i've read, UDP port 8010 is what  
needs to be opened and it connects via a server at Argonne? and the  
best reason to use it if you have firewall issues.


John I. Quebedeaux, Jr.; Louisiana State University
Computer Manager LBRN; 131 Life Sciences Bldg.
e-mail: johnq at lsu.edu; web: http://lbrn.lsu.edu
phone: 225-578-0062 / fax: 225-578-2597

On Oct 27, 2005, at 6:34 PM, Nagykaldi, Zsolt F. (HSC) wrote:

> Our department is new to the AG world and we are in the process of  
> setting up a room-based node to support our research  
> infrastructure. Our network is not multicast enabled, so we have  
> been trying to make the AG Connector work for weeks now and just  
> about to give up. The documentation of the connector is very sub- 
> optimal, to put it politely. In AG connector -driven multicast, if  
> we manage to keep the connection to the server, which is dropped  
> often, the other parties, who HAVE multicast enabled on their  
> networks can not see or hear us at all (we can hear and see them).  
> In unicast, without the connector, everything works both ways, but  
> we can not see any of the parties (no incoming video), although we  
> can hear them. I know that certain UDP ports must be open, but it  
> must be more complicated than that, since *rarely* the whole system  
> seems to be working well. The connector seems to work unreliably in  
> many situations and outcome is often unpredictable.
> If you have suggestions to both scenarios (multicast with connector  
> and unicast without), PLEASE, help us.
> Thanks!
> Zsolt
> _ _ _
> Zsolt Nagykaldi, PhD
> Research Associate, Clinical IT Specialist
> University Of Oklahoma Health Sciences Center
> Department Of Family And Preventive Medicine
> Oklahoma Center For Family Medicine Research
> 900 NE 10th Street
> Oklahoma City, OK 73104
> Phone: (405) 271-8000 Ext.:1-32212
> Fax:     (405) 271-1682

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