• VMware HA i.e. High Availability which works on the host level and is configured on the Cluster.
• A Cluster configured with HA will migrate and RESTART all the vms running under any of the host in case of any host-level failure AUTOMATICALLY to another host under the same cluster.
• VMware HA continuously MONITORS all ESX Server hosts in a cluster and DETECTS failures.
• VMware HA agent placed on each host maintains a heartbeat with the other hosts in the cluster using the service console network. Each server sends heartbeats to the others servers in the cluster at five-second intervals. If any servers lose heartbeat over THREE consecutive heartbeat intervals, VMware HA initiates the failover action of restarting all affected virtual machines on other hosts.
• You can set virtual machine restart priority in case of any host failure depending upon the critical nature of the vm.

NOTE: Using HA in case of any host failure with RESTART the vms on different host so the vms state will be interrupted and it is not a live migration

NOTE: Using HA in case of any host failure with RESTART the vms on different host so the vms state will be interrupted and it is not a live migration