Which VMware feature allows migration of VMs between ESXi hosts with different CPU architectures?

Enhanced vMotion Compatibility (EVC) is the VMware feature designed to facilitate the migration of virtual machines (VMs) between ESXi hosts that may have different CPU architectures. EVC works by ensuring that the CPU features presented to the VMs are compatible across the cluster of hosts, regardless of the underlying hardware. This is particularly important in environments where you might have CPUs from different generations or families that support varying instruction sets.

When EVC is enabled, it allows the cluster to "mask" certain CPU features so that all ESXi hosts appear to have a uniform set of features. This capability is essential for migrating VMs seamlessly without requiring downtime or the risk of incompatibility issues that could arise from differing CPU architectures.

In summary, EVC allows virtual machines to migrate freely between hosts with different CPU capabilities, thereby enhancing the flexibility and availability of workloads in a VMware environment.