vSphere Fault Tolerance is used in the context of a vSphere HA cluster. After you have configured networking on each host, create the vSphere HA cluster and add the hosts to it. You can check to see if the cluster is configured correctly and complies with the requirements for the successful enablement of Fault Tolerance.
Prerequisites
Launch the vSphere Client and log in to a vCenter Server system.
Procedure
Results
The results of the compliance test appear at the bottom of the screen. A host is labeled as either Compliant or Noncompliant.