In a standard "all" config there are two JGroups channels created -- one in cluster-service.xml and one in tc5-cluster.sar/META-INF/jboss-service.xml. (The latter was formerly tc5-cluster-service.xml in 4.0.3.SP1 and earlier.) You need to use distinct names, mcast_addr and mcast_port configs between these two files. But, for each file, the name, mcast_addr and mcast_port should be the same on all servers. Thus the cluster-service channels see each other and form a group and the tc5 channels see each other and form a group, and the two sets of channels don't see each other. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4015882#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...