Virtual MAC

It is a MAC address associated with the HA cluster. This address is sent in response when any of the machines make an ARP request to HA cluster. It is not the actual MAC address and is not assigned to any interface of any unit in the cluster.

The primary device owns the MAC address and is used for routing network traffic. All external clients use this address to communicate with the HA cluster. In case of failover, the new primary device will have the same MAC address as the failed primary device. The cluster device which has a virtual MAC address acts as a primary device.