No, this doesn't look stupid: it is indeed possible to run several different clusters on the same network. In fact, it is even possible to make a single JBoss node part of several clusters at the same time (but this is not what you should do in your particular case)
You may define, in the xml file of the clustering, in which target cluster name your service has to work. By default, nothing is specified so a default name is used (hence, all nodes belongs to the same default cluster by default).
How to set up two independent cluster in the same Local Area NetWork?. I have changed "ClusterName" in tc5-cluster-service.xml. Inspite of that deploying or undeploying the application in one cluster reflects the change in the other cluster.Can you please help me.