[AG-TECH] Having trouble with receiving video

[Michael Miller]

Sounds like we need to brush up on our Mulitcast diagnosis skills and contact our net admins with the right information.  I admit I haven't had many unexplained multicast problems lately, but I wrote up a quick guide to some multicast troubleshooting tips:

http://www.accessgrid.org/node/1801

hope this helps,

Michael Miller
NCSA


"If you're clear in your vision and trust the people in your team with clear objectives, they will invariably do their best to achieve everything desired, and usually deliver everything you could have hoped for and even more." -Paul Debevec

----- Original Message -----
From: "Mike W Daley" <Mike.W.Daley at cs.cardiff.ac.uk>
To: "Emile J. Pelotte" <epelotte at mmc.edu>
Cc: ag-tech at lists.mcs.anl.gov
Sent: Wednesday, February 11, 2009 2:21:03 PM GMT -06:00 US/Canada Central
Subject: Re: [AG-TECH] Having trouble with receiving video

I have noticed a few strange problems recently.
We do a lot of demos of Access Grid and I navigate around to show  
visitors how it all works.
Lately I find it difficult to receive video. I have not seen any in  
the Argonne Lobby for a while, even though the client shows people  
parked in there.
I am beginning to believe that it is a networking fault somewhere.  
Here is todays observations.
Multicast in the UK at the moment appears flaky. Currently  
non-functional at Cardiff.
If I use the Manchester AGSC bridge I'm OK for sites in the UK but see  
no video from Argonne etc. If I go to Asian Pacific I initially see no  
video but if I change my bridge to one in Perth I see video from Asian  
Pacific Lobby.
Any ideas or similar observations.

Mike


Michael Daley M.Phil MBCS GCFA

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