Basic script to pull an inventory of ESXi VTEP interfaces

ESXi VTEP Report.ps1

$vtepReportPath  = "$Home\Desktop\ESXi_VTEP_Report.csv"
$vtepFinalReport = @()

Get-VMHostNetworkAdapter -VMKernel | Foreach-Object {

    $vtepInterfaceQuery = $null 
    $vtepInterfaceQuery = $_.ExtensionData | Where-Object {$_.Spec.NetStackInstanceKey -eq 'vxlan'}

    foreach ($vtep in $vtepInterfaceQuery) {

        $objVtepInt = @()
        $objVtepInt = [PSCustomObject] @{
            VMHost       = $_.VMHost
            Interface    = $vtep.Device
            MacAddress   = $vtep.Spec.Mac
            IPv4Address  = $vtep.Spec.Ip.IpAddress
            SubnetMask   = $vtep.Spec.Ip.SubnetMask
            DHCP         = $vtep.Spec.Ip.Dhcp
            MTU          = $vtep.Spec.Mtu
            TsoEnabled   = $vtep.Spec.TsoEnabled
            NetworkStack = $vtep.Spec.NetStackInstanceKey
            PinnedPnic   = $vtep.Spec.PinnedPnic
        } # end $objVtepInt

        $vtepFinalReport += $objVtepInt

    } # end foreach $vtep
    
}  # end foreach-object

$vtepFinalReport | Export-Csv -Path $vtepReportPath -NoTypeInformation -Force