Enable EVC on an existing cluster to help ensure vMotion compatibility between the hosts in the cluster.
- You must be connected to a vCenter Server system with the vSphere Client.
- Before you enable EVC on an existing cluster, ensure that the hosts in the cluster meet the requirements listed in the vCenter Server and Host Management publication.
- In the vSphere Client, select the cluster for which you want to enable EVC.
- If virtual machines are running on hosts that have feature sets greater than the EVC mode you intend to enable, ensure that the cluster has no powered-on virtual machines.
- Power off all the virtual machines on the hosts with feature sets greater than the EVC mode
- Migrate the cluster’s virtual machines to another host using vMotion.
Because these virtual machines are running with more features than the EVC mode you intend to set, power off the virtual machines to migrate them back into the cluster after enabling EVC.
- Ensure that the cluster contains hosts with CPUs from only one vendor, either Intel or AMD.
- Edit the cluster settings and enable EVC.
Select the CPU vendor and feature set appropriate for the hosts in the cluster.
- If you powered off or migrated virtual machines out of the cluster, power on the virtual machines in the cluster, or migrate virtual machines into the cluster.
Any virtual machines running with a larger feature set than the EVC mode you enabled for the cluster must be powered off before they can be moved back into the cluster.