In JBoss AS 5.x we are using multiplexer and same stack can be used across all four services namely cluster-beans.xml, ejb3-clustered-sfsbcache-beans.xml, ejb3-entity-cache-beans.xml and tc6-cluster-beans.xml. In past I have received many queries on how to change the Cluster name, MCast UDP Port and Address to create unique cluster. Now with introduction of Multiplexer and Four services making use of this Multiplexer will even complicate the matter. I guess in Installer we can introduce one more screen where user can enter the unique name for its cluster for each of four services as well as can set the Multiplexer Stack that it wants to use. Stack can be same or different for each of the four services.