Increased network reliability – In a High Availability configuration, the Secondary Security Appliance assumes all network responsibilities when the Primary unit fails, ensuring a reliable connection between the protected network and the Internet.
Cost-effectiveness – High Availability is a cost-effective option for deployments that provide high availability by using redundant Security Appliances. You do not need to purchase a second set of licenses for the Secondary unit in a High Availability Pair.
Virtual MAC for reduced convergence time after failover – The Virtual MAC address setting allows the HA Pair to share the same MAC address, which dramatically reduces convergence time following a failover. Convergence time is the amount of time it takes for the devices in a network to adapt their routing tables to the changes introduced by high availability. By default, the Virtual MAC address is provided by the SonicWall firmware and is different from the physical MAC address of either the Primary or Secondary Security Appliances.