FT will still kick in when vCenter is down. The secondary VM comes online when the primary fails.
However, in FT, when the secondary VM comes up, a new VM is created again to sustain a second failure. This will not happen if the vCenter is down.
Please refer to FT FAQs for more information.
kb.vmware.com/kb/1013428
If you found this or any other answer helpful, please consider the use of the Helpful or Correct buttons to award points.
