In Section 13.1.2 of the "Administration and configuration guide",
(http://www.redhat.com/docs/en-US/JBoss_Enterprise_Application_Platform/5.0.1/html/Administration_And_Configuration_Guide/clustering-intro.chapt.html#clustering-quickstart-launching )
there is :
(a) no information on how to configure and launch Jboss EAP 5.x server with cluster in TCP mode.

I found no documentation that explain how to do this task in Jboss wiki.
But I found a post with this name "Lost in the documentation UDP->TCP" ( http://community.jboss.org/thread/68769 )
in Jboss Forum but that don't work with Jboss EAP 5.1.x.

I have still the error " ERROR [TCPPING] failed creating initial list of hosts
java.net.UnknownHostException: ${jboss.jgroups.tcp.tcpping.initial_hosts}:192.168.0.1.