How to configure the network interface for JGroups cluster communication in EAP 7

Issue

• JBoss EAP 7 instances do not form a cluster if the servers are installed on different hosts
• Servers on different hosts in domain mode does not join the cluster with the other servers installed even if the same server-group is used, what is the correct configuration?
• When forming cluster between domain controller(host1 with 1 server) and host controller (different physical machine , host-2 with 1 server) , both servers referring to same server-group exception is generated and cluster does not form after deploying clustered application.