I don't recommend UDP.send_on_all_interfaces=true. UDP.receive_on_all_interfaces=true is a bit suspect too, although not as much as send_on_all_interfaces. It's much better IMO to pick a common network and bind all nodes to an interface on that network it using -b xxx or -Djgroups.bind_addr=xxx. Reserve receive/send_on_all_interfaces for situations where you really have no choice. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4260842#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...