[AG-TECH] Multicast Issues

[Jim Miller]

Just to clarify Mike's comments.  When using our bridge (unicast), you are
reliant on multicast from our server (in Chicago) to the other multicast
sites.  If other sites are bridging using another bridge (an NCSA AG2 venue
for instance), then the multicast would need to be stable between the two
bridge locations.  We are launching an inSORS server on an Internet2 site
(through the Internet2 Commons Hosted Environment Project) which will
improve multicast reliability from our bridge.  More on this when we
finalize testing of the new server.

If everyone uses the same bridge, then it is unicast to everyone.  This puts
heavy bandwidth and processing at the server site but is the most reliable.
AG2 Toolkit sites cannot use an inSORS bridge unfortunately (for now at
least).  inSORS site can connect an AG2 bridge through Manual Bridge option
if you know the ip and ports for the particular venue.


  -----Original Message-----
  From: owner-ag-tech at mcs.anl.gov [mailto:owner-ag-tech at mcs.anl.gov]On
Behalf Of Michael A Gideon
  Sent: Tuesday, April 19, 2005 12:25 PM
  To: Joe Barron; ag-tech at mcs.anl.gov
  Subject: RE: [AG-TECH] Multicast Issues


  Hi Joe,

  I was having similar issues a month or so ago.  inSORS told me their
multicast was not stable, and to use unicast instead.  I tried it and the
problems went away.  I don't know if it was their software or some network
issues.

  Mike






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  From: owner-ag-tech at mcs.anl.gov [mailto:owner-ag-tech at mcs.anl.gov] On
Behalf Of Joe Barron
  Sent: Tuesday, April 19, 2005 7:51 AM
  To: ag-tech at mcs.anl.gov
  Subject: [AG-TECH] Multicast Issues



  Howdy Gang -



  We are running a few inSORS boxes and appear to be having multicast
issues. We connected just fine in a conference yesterday in the Walkabout
venue. This morning, we can get and transmit audio but we are not getting
and no one is receiving video.



  Another site in Texas has reported similar issues. Is anyone aware of any
larger I2 issues currently?



  Regards



  Joe Barron

  Texas A&M University
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