Cannot Ping a WLBS Server from Another WLBS Server

CAUSE

This issue is a single network interface card (NIC) limitation. If you are using a single NIC and have not selected the Windows NT Load Balancing Service (WLBS) multicast support, the cluster hosts will not be able to communicate with each other even though they can exchange network traffic with outside systems.

NOTE: On a cluster host with multiple NICs (multihomed), using the Virtual NIC to access the dedicated IP address (IP address bound to the virtual NIC but configured not to be load balanced) of another multihomed cluster host causes WLBS to consider this a single-NIC configuration