Sangil, It's simple reason why this is the case: If two bridges do not have multicast connectivity between them, then the traffic between the two bridges can not reach each other.
On the same bridge, you can be sure everyone is connected to the same traffic; but, if on different bridges - currently there is no way to be sure that the multicast traffic reaches between bridges without testing. Currently, there is no way without just testing which bridges do this - and sometimes the networks change between sites that multicast breaks and until reported isn't fixed. For an event, I will typically (if required) suggest which bridge sites should utilize if they aren't multicast capable that I know can work between bridges. *most* of our sites here are now multicast enabled however, so we try not to rely on bridges at all. note: be sensitive to using other people's bridges because that will incur extra traffic on their network (if for large # of clients and bandwidth, this could be a problem for some sites hosting bridges without them realizing it). We have 'internal' bridges in our state where we have our own registry that we only give out to our Louisiana site nodes so they only show up for our clients. Very useful way to take advantage of the registry feature. -John Q. -- John I. Quebedeaux, Jr.; Louisiana State University Computer Manager LBRN; 131 Life Sciences Bldg. e-mail: jo...@lsu.edu; web: http://lbrn.lsu.edu phone: 225-578-0062 / fax: 225-578-2597 > From: Sangil Choi <sic...@netmedia.gist.ac.kr> > Date: Fri, 30 Jul 2010 19:39:42 +0900 > To: "ag-t...@mcs.anl.gov" <ag-t...@mcs.anl.gov> > Subject: [AG-TECH] All client in same venue use same bridge? > > Hi everyone, > > I've problem about bridge. > > > > I installed 'AGTk3.2 beta 1' on three nodes and includes that as one venue. > > In that case, I found the problem about communicate each others. > > If the nodes connect with same bridge, the node can find other node's > information in RAT and vic. > > In other case, nodes connect with different bridges to communicate each other, > there are no RAT and vic information of other nodes. > > If one node uses bridge and others use multicast, bridge connected node can > find multicast node's information in RAT and vic. > > > > Could you tell me about reason about this? > > This problem occurs from our mistake? > > > > Regards, > > Sangil Choi. > > > > p.s : Used bridge is not ours and other bridge works as same problem.
