You could use invalidation so only eviction messages are broadcast, but this means that the caches need to be in the same cluster. Just because they are in different LANs doesn't mean they cannot be clustered - consider using TCP or TCP_NIO, or even the TUNNEL protocol in your cluster configuration instead of UDP. See JGroups docs for more details. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4064732#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...