Hi.

We do not already have our own bridge. We are using one of the Suggested 
Regional Unicast Bridges (UVIGO). We did not set it up, so I could not 
really answer those questions.

Thanks for your reply

-----------------------------------------
Ángel Rincón Trimiño.
Servicio de Informática y Comunicaciones.
Universidad de Sevilla.
Edificio Rojo.
Despacho 1.26.
Avenida Reina Mercedes s/n.
Tfn: 954559991.
E-mail: artrim...@us.es.


El 21/10/10 13:34, Andrew Rowley escribió:
> Hi,
>
> My immediate thought would be that the machine hosting the unicast bridge is 
> at fault.  This could suggest a (admittedly poorly designed) firewall 
> operating on the machine so that the multicast traffic is being blocked 
> (although the block appears to happen at some point into the meeting).  Can 
> you tell me:
> 1) What OS is the unicast bridge running on?
> 2) Is the unicast bridge a standard AGTk bridge server?
> 3) Is there a firewall on the unicast bridge machine?
>
> Andrew :)
>
>
> ---------------------------------------------------------
>
>     Andrew G D Rowley
>     Senior Development Officer
>
>     Research Computing Services
>     The University of Manchester
>     Devonshire House, Oxford Road
>     Manchester, M13 9PL
>
>     t :  +44 (0) 161 275 0685
>     e :  andrew.row...@manchester.ac.uk
>     w :  www.manchester.ac.uk/researchcomputing
>
> ---------------------------------------------------------
>
>
>    
>> -----Original Message-----
>> From: ag-tech-boun...@lists.mcs.anl.gov [mailto:ag-tech-
>> boun...@lists.mcs.anl.gov] On Behalf Of artrim...@us.es
>> Sent: 21 October 2010 11:52
>> To: AG-TECH
>> Subject: [AG-TECH] unicast + multicast
>>
>> Hi everyone.
>>
>> At the University of Seville, we're having AccessGrid meetings with
>> some
>> other Spanish Universities. Some of them have multicast capabilities,
>> some others don't. The session seems to work fine until, at some
>> particular moment, those participants using a unicast bridge are not
>> able to see nor hear those using multicast.  Two perfectly isolated
>> groups (connected to the same venue) are created.
>>
>> Any suggestions?
>>
>> --
>> -----------------------------------------
>> Ángel Rincón Trimiño.
>> Servicio de Informática y Comunicaciones.
>> Universidad de Sevilla.
>> Edificio Rojo.
>> Despacho 1.26.
>> Avenida Reina Mercedes s/n.
>> Tfn: 954559991.
>> E-mail: artrim...@us.es.
>>      
>
>    

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