Yes, if your environment can't support multicast for discovery you'll need to replace MPING with TCPPING. Something like: | <TCPPING timeout="3000" | initial_hosts="${jbm.data.tcpping.initial_hosts}" | port_range="1" | num_initial_members="3"/> Key thing is don't reuse the jgroups.tcpping.initial_hosts system property as you'll need different ports (7900 instead of 7600). View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4268366#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...