Fault Tolerance Requirements, Limits, and Licensing
Before using vSphere Fault Tolerance (FT), consider the high-level requirements, limits, and licensing that apply to this feature.
CPUs that are used in host machines for fault tolerant VMs must be compatible with vSphere vMotion or improved with Enhanced vMotion Compatibility. Also, CPUs that support Hardware MMU virtualization (Intel EPT or AMD RVI) are required. The following CPUs are supported.