JBoss Clustering on Linux IP_MULTICAST_IF  error

* JBoss 4.0.5
* Fedora Core 6  (Linux)
* Java 1.6.1_01  (also tried 1.5.1_01) JDK
* Starting JBoss as a Linux service with a jboss link under  'etc/rc.d/init.d'
   starting parameters  ::  run.sh -c default -b 0.0.0.0 -g DefaultPartition
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Hello everyone:
- I am trying to cluster JBoss across two Linux boxes.
- I Have installed the JEMS installer of JBoss 4.0.5 with EJB3 clustered option selected.  (cluster-service.xml is present under "server/default/deploy"  directory.
- I will only try to start configuring the 2nd server 'after' I get this server up and running:

I keep getting the following error:
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08:49:04,042 ERROR [JChannel] exception: java.lang.Exception: exception caused by UDP.start(): java.net.SocketException: bad argument for IP_MULTICAST_IF: address not bound to any interface
08:49:04,045 WARN  [ServiceController] Problem starting service jboss.cache:service=TomcatClusteringCache
ChannelException: java.lang.Exception: exception caused by UDP.start(): java.net.SocketException: bad argument for IP_MULTICAST_IF: address not bound to any interface
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> I've read articles about trying to disable IP_MULTICAST_IF to prevent application chatter over network
> Someone in my shop suggested 'IP Multicast' is a network-policy level blocking

I need some help to get past this error.

I Will include my full   cluster-config.xml in a following comment (to keep this posting clean.)

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