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2V0-621 · Question #216

Refer to the Exhibit. An administrator receives an error on a vSphere cluster as shown in the Exhibit. Based on the exhibit, which three configuration changes can resolve the error? (Choose three.)

The correct answer is A. Change the Admission Control policy for the cluster. B. Adjust CPU and Memory reservations of the virtual machines. C. Increase the amount of failover resources in the cluster.. A vSphere HA admission control error indicates the cluster cannot guarantee failover capacity; it can be resolved by modifying the admission control policy, reducing VM reservations, or adding more failover resources.

Section 6 – Administer vSphere 6.x Availability

Question

Refer to the Exhibit. An administrator receives an error on a vSphere cluster as shown in the Exhibit. Based on the exhibit, which three configuration changes can resolve the error? (Choose three.)

Exhibit

2V0-621 question #216 exhibit

Options

  • AChange the Admission Control policy for the cluster.
  • BAdjust CPU and Memory reservations of the virtual machines.
  • CIncrease the amount of failover resources in the cluster.
  • DReconfigure the ESXi host cluster for High Availability.
  • EDisable Virtual Machine Monitoring.

How the community answered

(43 responses)
  • A
    60% (26)
  • D
    26% (11)
  • E
    14% (6)

Why each option

A vSphere HA admission control error indicates the cluster cannot guarantee failover capacity; it can be resolved by modifying the admission control policy, reducing VM reservations, or adding more failover resources.

AChange the Admission Control policy for the cluster.Correct

Changing the Admission Control policy - for example switching from a percentage-based policy to a slot-based one, or adjusting the configured failover percentage - directly alters what resources HA considers reserved for failover and can eliminate the violation.

BAdjust CPU and Memory reservations of the virtual machines.Correct

Lowering CPU and memory reservations on virtual machines reduces the slot size or the total reserved capacity HA must account for, freeing enough headroom to satisfy the admission control requirement.

CIncrease the amount of failover resources in the cluster.Correct

Increasing failover resources by adding hosts or memory to the cluster directly raises the available capacity HA can use for failover, resolving the resource shortfall that triggered the error.

DReconfigure the ESXi host cluster for High Availability.

Reconfiguring HA on the cluster would re-enable or reset the HA service but would not change the underlying resource imbalance that causes the admission control error.

EDisable Virtual Machine Monitoring.

VM Monitoring is a HA feature that restarts VMs that become unresponsive; disabling it has no effect on admission control calculations or failover resource availability.

Concept tested: vSphere HA admission control error resolution

Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.avail.doc/GUID-85D9D717-F716-4B23-88B6-C9F4A2C6E0CC.html

Topics

#HA admission control#failover resources#VM reservations#cluster capacity

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