Getting ready

Although the actual process of enabling HA is as simple as a click of the checkbox, in order to successfully host the VMs from a failed host, the following prerequisites need to be met:

1. All hosts must be licensed for vSphere HA.
2. All hosts should access the same shared storage, that is, access to the datastore containing the virtual machine files.
3. All hosts should have access to the same virtual machine networks.
4. All hosts should be configured to have a common Management Network.
5. Sufficient compute resources (CPU and memory) to meet the virtual machine resource requirements to support a failover event.