Script to set the static Mac address

I have an Infrastructure virtual with about 200 vm with several vNIC and automatic Mac address. I need to assign static Mac for all NICs for and want to perform this operation with a powershell script and a csv input file. I have the entry csv file that looks like this: Vm, portgroup Mac Vm1 00:11:22:33 Vm1, pg1, pg2, 00:11:22:44 Vm2, pg1, 00:11:44:44 (I know the Mac above are not valid) can anyone help with the powershell code to automate the static configuration of mac?  Thanks in advance

Hello, ITS.

You should be able to use the following to achieve:

## import the info from the CSV$colNICInfo = Import-Csv c:\vmNICInfo.csv$colNICInfo | %{    $oSingleNICInfo = $_    ## get the VM, get its NetworkAdapters and for the one whose NetworkName matches that from the CSV, set its MAC address    Get-VM $oSingleNICInfo.VMName | Get-NetworkAdapter | ?{$_.NetworkName -eq $oSingleNICInfo.NetwkName} | Set-NetworkAdapter -MacAddress $oSingleNICInfo.MACAddr -Confirm:$false -WhatIf} ## end foreach-object

A few things to note:

  • I left the '-WhatIf "parameter on the Set-NetworkAdapter portion, so that you can run this first (perhaps with a small sample of game in the CSV file) to check that things look like they will work.  Remove this parameter to set the MAC addresses
  • The code provides that the CSV of this format:
    MACAddr VMName, NetwkName,
    someVM, VLAN128, 00:50:56:00:00:0F
  • The cmdlet Set-NetworkAdapter requires the new MAC address in the range 00:50:56:00:00:00 - 00:50:56:3F:FF:FF.  It's not the range likely to use, VMware only a subset.  Seems to be a limitation of the cmdlet (probably intentional).

Message edited by mattboren: added a note about removing "-WhatIf" to actually set the MAC addresses of the network adapters

Tags: VMware

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