Hi Hetvi Mistry,
Will you please provide me step by step procedure for instances are on same box.
Thanks in advance
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I suppose you copy the JBoss installation from the same box to a diffenrent and change only the ip address, right? So the configuration should be correct.
How do you start the instances and what version do you use?
I've seen many problems with multicast.
- must use the same sub-network (or configure the network for this)
- check network hardware in between of both boxes (switches might drop mcast packages)
- the configuration of ip-bind-address and mcast address on your box might be wrong
You can play with the test tool of JGroups  changing mcast and bind address.
Thanks a lot for pointing me to this issue.
Before I posted the issue, we were just having a doubt if our configuration is a problem or there is a network/multicast issue. We took help from the network folks and actualy found out that the multicast IPs which we are using are dropping the virtual connections.
Regd. your queries on how do we start the instances, we have developed startup scripts which internally executes run.sh along with multiple options like -u <Multicast IP>.
We are right now using, JBoss Enterprise Application Platform 4.3.0.GA_CP09 version.
Thanks for a lot helpful information again.