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.
