One multiplexer integration problem I've noticed is using the JBoss system property expansion technique doesn't work with multiplexer-stacks.xml. E.g. <UDP | mcast_port="45588" | mcast_addr="${jboss.partition.udpGroup:228.1.2.3}"...v will fail on setting up the protocol stack. Haven't thought about it; perhaps the solution is trivial. On a tangential topic, if we can solve the above problem, one good thing the multiplexer provides is the ability to set the multicast port via a system property and/or startup switch. That will make life easier for admins needing to segregate clusters. Wasn't practical before due to the numerous Channels deployed in a server. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3964850#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...