Let me refine my question as I dig more dipper into it.
I've been able to run two nodes on different IP addresses (on same subnet) with following settings using JBoss 3.2.8 sp1
1) Both nodes using TCP (although I had some issues like restart of one node not seeing the exisiting group so both instances running on Master mode etc.)
2) Both nodes using MULTICAST
However is the following configuration possible out of the box?
LAN Cluster using Multicast <---> TCP over WAN <---> LAN Cluster(or just a single node) under same partition
does all the nodes in LAN also has to be configured in TCP mode in which case we loose the Auto discovery.