Currenlty we dont have a monitoring key defined to get the count of guest VMs deployed on each host network interface. It would be good to have such an option available, so that it can help in balancing network interfaces. 

For example: 

In below Screenshot of one ofmy Exsi hosts, I have 2 10.40.x.x Private interface configured, so if I can get the No.of VMs against ecah interface as seen below, it would help us greatly.