In this post you’ll find two scripts that will help you find a VM via an IP or MAC address. I found the MAC address script on the vmtn communities and it was written by Luc Dekens (@LucD22):

http://communities.vmware.com/message/1068045#1068045

IP Address:

The following script will return the VM name after a short search. The only thing you need to enter is the ip address:

$tgtIP = "192.168.123.1"
$vms = Get-VM
foreach($vm in $vms){
  
  $vmIP = $vm.Guest.IPAddress
  foreach($ip in $vmIP){
    if($ip -eq $tgtIP) {
      Write-Host "Found the VM!" 
      $vm.Name 
    }
  }
}

When you add the script to the Virtualizaion Eco Shell, you will have to change the $tgtIP line:

$tgtIP = Read-Host "enter IP address"

When you run the script from the Eco Shell, you’ll have to enter an ip address:

After a couple of seconds (if you have a large environment it will take a while 😉 ) The script will return the VM name:

MAC Address

The following script start a search based on the MAC address of the VM.

$tgtMAC = ""
$vms = Get-VM
foreach($vm in $vms){
  
  $vmMAC = $vm | Get-NetworkAdapter | select MacAddress
  foreach($mac in $vmMAC){
    if($mac.MacAddress -eq $tgtMAC) {
      Write-Host "Found the VM!" 
      $vm.Name 
    }
  }
}

You can also add the script to the Eco Shell. Just change the $tgtMAC line to:

$tgtMAC = Read-Host "enter MAC address"