Find Mac address duplicated on VC
Hello:
I wonder how I can check for Mac address duplicated on the virtual machines under VC.
Basically, I want to run the script that will tell me if there are any duplicate Mac addresses exist.
I know how to find mac on VM (I use $vmMAC = $vm |) Get-NetworkAdapter | Select MacAddress), but are struggling to compare with a different Mac address without loop a whole script.
Thank you.
No, $macTab is defined as a table of hash on the first line.
It could be that the MAC address is not available on some guests.
Try the next version, I added a Where-Object to eliminate expectations of customers.
$macTab = @{}
foreach($vm in Get-VM){
Get-NetworkAdapter -VM $vm | where {$_.MacAddress} | %{
if($macTab.ContainsKey($_.MacAddress)){
Write-Host "Duplicate MAC address" $_.MacAddress "in" $vm.Name "and" $macTab[$_.MacAddress]
}
else{
$macTab[$_.MacAddress] = $vm.Name
}
}
}
Tags: VMware
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