Hi Brian, Thanks for your response. I have added the list of cluster nodes in as per your advise, but still cluster nodes not able to form the cluster. Changes I made are. 1 . In cluster-service.xml and tc5-cluster.sar/META-INF/jboss-service.xml uncommented the in TCP and added the list of cluster nodes. ie 192.168.0.30[7800],192.168.0.17[7800]. This modifications made in both the cluster nodes. Note : Instead of ipaddress I tried with the machine name too. Currently my testing is on Windows 2003 Server environment. Both the VLAN are in Same Domain. I can able to ping and access the machine from each other. Please Help. With Regs -Ansari S.H View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4046346#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...