Enabling EVC manually at VMware vCenter level is required

You must enable EVC mode manually at VMware vCenter level to allow compute nodes of different CPU architecture in the same cloud group.

When you add a new compute node to a cloud group, and if the compute node's processor type is different than the cloud group’s existing compute node, make sure to enable EVC mode (Enhanced vMotion Compatibility, feature of VMware) through VMware vCenter. Enable it to allow virtual machines migration between the compute nodes of a different processor type.
Attention:
  • It is mandatory that you enable the EVC mode before you add a new compute node to an existing cloud group and if the processor family is different.
  • If you add a new compute node of different processor type in a cloud group and if you do not enable the EVC mode, you might experience migration failures.
  • If you do not enable the EVC mode before you add a new compute node, the virtual machines that you started on higher capability processor features must be stopped to allow EVC enablement.
For more information, see the VMware documentation.
Tip: Enable the EVC mode to a lower processor level to ensure compatibility between different generations of processor type compute nodes. For example, in a mix of Broadwell and Cascade Lake processor type compute nodes, set the EVC mode to Broadwell.