With vmware HA we can configure basic protection for virtual machines, in case of host failure virtual machines will be restarted on available node in the cluster. But some of the most business critical applications need to run continue sly even without restarting.FT can use for this requirement.
With the FT protected virtual machines have two instances. Primary vm will be running on a one host and second instance of the virtual machine will be running on a different host. In case of original virtual machine failure the second instant will be continue the operation without having any data loss or connectivity loss.
How to configure FT
Configure FT network in the vcenter
Login to the vcenter server using web client