2V0-21.23 Question 44
Select 3A VMware administrator is managing a cluster of ESXi hosts with varying CPU generations. Workloads frequently need to be migrated between hosts using vMotion. However, the administrator notices that some vMotion migrations fail due to CPU compatibility issues. To address this, the administrator decides to enable vSphere Enhanced vMotion Compatibility (EVC). Which of the following are true about EVC in this scenario?
- A
EVC ensures that the CPU features exposed to virtual machines are consistent across all hosts in the cluster.
- B
Enabling EVC requires all VMs to be powered off before the feature is activated on the cluster.
- C
EVC compatibility mode is determined by the CPU features of the host with the oldest generation processor in the cluster.
- D
EVC only works if all ESXi hosts in the cluster are running the same version of the hypervisor.
- E
EVC allows you to add newer-generation hosts to the cluster without disrupting older hosts or running virtual machines.
Show answer and explanation
Correct answers: A, C, E
Explanation
vSphere Enhanced vMotion Compatibility (EVC) standardizes the CPU feature set across all hosts in a cluster, enabling vMotion migrations between hosts with different CPU generations. It achieves this by masking certain CPU features to match the capabilities of the host with the least advanced processor. EVC also allows for seamless integration of newer hosts into an existing cluster without disrupting virtual machines or compatibility. However, enabling EVC does not require VMs to be powered off and does not impose strict requirements for identical ESXi versions across the cluster.
- A. Correct.
Correct: EVC ensures consistent CPU features are presented to virtual machines across the cluster, avoiding compatibility issues during migrations.
- B. Incorrect.
Incorrect: Enabling EVC does not require all VMs to be powered off. However, the cluster must meet certain prerequisites, such as all hosts being compatible with the selected EVC mode.
- C. Correct.
Correct: EVC compatibility mode is based on the CPU features of the host with the oldest generation processor to ensure compatibility across all hosts.
- D. Incorrect.
Incorrect: EVC does not require all hosts to use the same ESXi version, although certain minimum requirements must be met.
- E. Correct.
Correct: EVC facilitates the addition of newer-generation hosts to the cluster while ensuring compatibility with older hosts and running VMs.