Hello Bela, As suggested, I have changed the tc5-cluster-service.xml as shown below and session replication now works fine. ############## ################ | vi /apps/jboss/current/server/devl-cluster-01/deploy/tc5-cluster-service.xml | --- | --- | --- | <Config> | <UDP mcast_addr="${jboss.partition.udpGroup:228.1.2.3}" mcast_port="45566" bind_addr="3.183.158.73" | ip_ttl="8" ip_mcast="true" | mcast_send_buf_size="8000000" mcast_recv_buf_size="1500000" | ucast_send_buf_size="8000000" ucast_recv_buf_size="1500000" | loopback="false"/> | <PING timeout="2000" num_initial_members="3" | up_thread="true" down_thread="true"/> | ---- | ---- | ---- | ############## ################ That was a great input. Thanks, Rajesh. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4103592#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...