In the deploy folder of jboss, there are four files which have an ''ip_mcast'' setting.
In each file, set ip_mcast="false"
It's even easier. You can always run the default server configuration that does not include clustering. Simply go to the JBOSS_HOME/bin directory and type ./run.sh or (UNIX/LINUX) run.bat(Windows).
This will start the default instance of JBoss without clustering, IIOP etc.