Hello, Try the following to avoid UDP Warnings. 1. Don't modify cluster-service.xml file in the JBoss AS. 2. Run the server using the following command. /run.sh -c all -g server1 -u 228.1.2.3 Where, -g option is for specifying the partition name. -u option is for specifying the UDP multicast address. For more information refer http://wiki.jboss.org/wiki/Wiki.jsp?page=TwoClustersSameNetwork Hope, It should solve your problem. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4016181#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...