False alarm for the vSAN health check - ‘All hosts have a Virtual SAN vmknic configured"

Products

• VMware vSAN

Issue/Introduction

Symptoms:

• The vSAN health might report an incorrect status for the network health check of the type "All hosts have a Virtual SAN vmknic configured" and then trigger the false vCenter Server alarm
• The vSAN health may also report "Physical disk health retrieval issue" under Physical Disk Health though there are no disks which are in failed state in cmmds

Impact/Risks:
False alarms or false health warnings are reported though there is no real problem in the vSAN Cluster

Environment

VMware vSAN (All Versions)

Cause

All these false alarms/warnings may be triggered if the vCenter version is down rev of ESXi version.

• To verify there is no real problem in the cluster, run the below command to confirm the cluster is fully formed, you should see "Cluster member count" equal to the number of hosts in the vSAN Cluster.

esxcli vsan cluster get

• You can verify the vSAN network on each host by running the below command:

esxcli vsan network list

Resolution

Upgrade vCenter to be equal to or later than the ESXi version.

Additional Information

vCenter version to ESXi version (68174)