DSCPullServerLab

2.9

Private/New-LabVirtualSwitch.ps1

function New-LabVirtualSwitch {
    [CmdletBinding()]
    Param(
        [Parameter (Mandatory=$true)]
        [string]$SwitchName,

        [switch]$Force
    )
    try {
        $Message = "The virtual switch '$SwitchName' already exists"
        if (Get-VMSwitch -Name $SwitchName -ErrorAction SilentlyContinue) {
            if ($Force -eq $false) {
                throw "$Message."
            }
            elseif ($VM = Get-VM |
                          Get-VMNetworkAdapter |
                          Where-Object Status -eq 'Ok' |
                          Where-Object SwitchName -eq $SwitchName -ErrorAction SilentlyContinue) {
                $VMs = $VM.name -join ','
                throw "$Message but cannot be deleted because it is being used by running VM(s) $VMs."
            }
            else {
                Write-Verbose "$Message. Replacing with a new one..."
                Remove-VMSwitch $SwitchName -Force
            }
        }
        New-VMSwitch -Name $SwitchName -SwitchType Internal | Out-Null
    }
    catch {
        $PSCmdlet.ThrowTerminatingError($_)
    }
}