Remove specific VM NIC based on MAC address

[Cinju]

I currently have a requirement to remove a specific NIC card ( We have 3 NICs assigned to each VM)  from guest VMs . The VM numbers are so huge and the order of NIC card that needs to be removed may vary from VM to VM . So my current inputs would be VM Name and MAC address on a csv file probably . If the VM name is 'test1' and corresponding MAC is "xxx" then I need to remove the specific NIC  corresponding to that MAC address (which can be any of this 1-3) .  Even if the verification is mac address alone, it should be fine. I am much new to scripting and couldn't get this done . Can any of you support here 

[LucD]

What do you already have?

[Cinju]

This is the script that I am having and it removes the 2nd NIC interface 

Import-module vmware.vimautomation.core
Import-module VMware.VimAutomation.Vds

$VMs = Get-Content <path for txt file>

$vcenter = <vcenter name>
Connect-VIServer -Server $vcenter

foreach ($VM in $VMs)
{
$Var = Get-VM -Name $VM
$nic = $Var.ExtensionData.Config.Hardware.Device | where {$_.DeviceInfo.Label -eq "Network adapter 2"}

$spec = New-Object VMware.Vim.VirtualMachineConfigSpec
$dev = New-Object VMware.Vim.VirtualDeviceConfigSpec
$dev.operation = "remove"
$dev.Device = $nic
$spec.DeviceChange += $dev

$Var.ExtensionData.ReconfigVM($spec)
}

[LucD]

I'm not sure how this fits in with your original request to remove vNICs with a specific MAC address.
If you have a CSV, I would do something like this

# CSV contains
#
# VM,Mac
#

Import-Csv -Path .\vm.csv -UseCulture -PipelineVariable row |
ForEach-Object -Process {
    Get-VM -Name $row.VM | Get-NetworkAdapter |
    where{$_.MacAddress -eq $row.Mac} |
    Remove-NetworkAdapter -Confirm:$false
}

[Cinju]

Thank you very much LucD 

 Remove-NetworkAdapter -Confirm:$false

I think if we give this command, the VM power state must be powered off right ? Rest of the code is working as intended as instead of Remove I had set it to disconnect and that is working properly 

Import-Csv -Path .\vm.csv -UseCulture -PipelineVariable row |
ForEach-Object -Process {
    Get-VM -Name $row.VM | Get-NetworkAdapter |
    where{$_.MacAddress -eq $row.Mac} |
    Set-NetworkAdapter -Connected:$false -Confirm:$false
}

[LucD]

That is correct, the cmdlet will require the VM to be powered off.

But with the API method, you can remove vNICs while the VM is powered on.
See Solved: Re: Removing Network Adapters from Powered On VM's - VMware Technology Network VMTN for some sample code.

[Cinju]

Thanks a lot LucD . Managed to get this working. 

$VMs = Import-Csv -Path .\VM.csv -UseCulture -PipelineVariable row |

ForEach-Object -Process {

$VMList = Get-VM -Name $row.VM

$nic = $VMList | Get-NetworkAdapter | where{$_.MacAddress -eq $row.Mac}

$niccheck = $VMList.ExtensionData.Config.Hardware.Device | where {$_.DeviceInfo.Label -eq $nic}

$spec = New-Object VMware.Vim.VirtualMachineConfigSpec

$dev = New-Object VMware.Vim.VirtualDeviceConfigSpec

$dev.operation = "remove"

$dev.Device = $niccheck

$spec.DeviceChange += $dev

$VMList.ExtensionData.ReconfigVM($spec)