A cache cluster can be bound with a dedicated IP address in the following way:
Using NCache Manager
Right click on a server IP address under Server Nodes in Cache Explorer and click on Select Network Interface Card option.
AvailableNetwork Interface Cards dialog will open. It will contain all network cards available on that node with drop down list. By default, IP is used for both client-server and inter cluster communications.
Select the Cluster option from the drop down list in front of the IP address with which you want to bind the cluster.
Click Apply.
NCache will ask for confirmation to apply configuration and restart service. Click Yes.
This restarts the NCache service to use the selected IP addresses for the specified communication (inter-cluster).