No, there are no nodes with the same IDs on the LAN. The cluster is partitioned using different partionNames, but this seems to not help with JBM. http://docs.jboss.org/jbossas/jboss4guide/r4/html/cluster.chapt.html | ... | In order for nodes to form a cluster, they must have the exact same PartitionName and the ParitionCo | nfig elements. Changes in either element on some but not all nodes would cause the cluster to split. | | ... | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4178974#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...