How to check EVC Status of a Host Cluster with PowerCLI

Consider this part 2 of my vSphere Health Check with PowerCLI series. It’s taken its sweet time, I know, but hey – better late than never eh? 😉 Part 1 is found here (Checking for hosts with alarms disabled) .

In this post we’ll discuss how to check the EVC mode of each host cluster in the vCenter. EVC (Enhanced vMotion Capability) is a feature that is a form of standardization of vMotion compatibility in hosts in the cluster according to CPU generation. It sets a minimum feature set offered by CPUs in the cluster so that all hosts presents identical features so that things don’t go haywire when VMs migrate between them. Anyway this is not a lesson on EVC (if you want more info, refer the KB article), this is a lesson on checking on the EVC mode on a cluster by PowerCLI

We will first check whether EVC is enabled in the first place, and if its enabled, which EVC mode its enabled to. While this seems like a lot of complexity – its actually only a few lines of code.

Checking if EVC is enabled

EVCmode information is encapsulated in the Get-Cluster module. So let’s access Get-Cluster and check on the EVCmode parameter. If this EVC mode returns a null value then EVC is not enabled in that cluster. If EVC mode is enabled then it would return the EVC Mode (like Intel “Haswell”, Intel “Skylake”, Intel “Cascade Lake” etc…). Lets see how it comes in to play

$cluster = $Get-Cluster <cluster_name>
if($null -eq $cluster.EVCMode){
        $evc_status = "Status : Disabled"

        $evc_mode = $cluster.EVCMode

        $evc_status = "Status : Enabled EVC Mode : $evc_mode"



Lets see how we can use the above principle to get a one-liner to export a csv with the EVC mode results

Get-Cluster |  Select @{N='Cluster';E={$_.Name}},@{N='EVC Mode';E={if($null -eq $_.EVCMode){"EVC not enabled"} else{$_.EVCMode}}} | Export-Csv 'cluster_evc.csv'

And that’s it! Its as simple as that!

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And as always, Happy scripting!