I have deployed Management Center and Access Control virtual engines on a VMware ESX. And I was able to install Extreme Management Center (formerly NetSight) network management evaluation license.
But when I tried to add NAC virtual appliance through NAC Manager "No Gateways Detected" error occurred.
They are on the same subnet and able to ping each other using their hostnames.
Both engines are running on version 126.96.36.199