All clients and remote sites continue to use the same Virtual MAC address and IP address without interruption. When a Failover occurs, all routes to and from the Primary appliance are still valid for the Secondary appliance. The Virtual MAC address greatly simplifies the process of data loss or connection outage by using the same MAC address for both the Primary and Secondary appliances. The 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. The Virtual MAC address allows the High Availability pair to share the same MAC address, which dramatically reduces convergence time following a fail over. Until this ARP request propagates through the network, traffic intended for the Primary appliance’s MAC address can be lost. The makes the Secondary appliance issue an ARP request, announcing the new MAC address/IP address pair. Because the appliances are using the same IP address, when a Failover occurs, it breaks the mapping between the IP address and MAC address in the ARP cache of all clients and network resources. When Virtual MAC is disabled, the Active and Standby appliances each have their own MAC addresses. This Article provides detailed description on how Virtual MAC works in the HA environment and it's benefits. Copy URL The link has been copied to clipboard.
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