Problem: When starting a failover VM on a vApp, the network comes up as Unidentified.

The vApp’s IP is pingable, and the appliance is able to ping the VM IP, but the VM itself cannot ping the gateway or ping out anywhere else

Cause: This occurs when the ESX VM host’s network has promiscuous mode set to reject connections.

Solution:  Please verify your VM host’s network settings by reviewing the Configuring VM Host Network instructions.