Creates PortGroups on Standard vSwitches on all Hosts in a vSphere Cluster

PortGroup-Creator.ps1

# Load VMware  Snapin (if not already loaded)
if (!(Get-PSSnapin -Name VMware.VimAutomation.Core -ErrorAction SilentlyContinue)) {
	if (!(Add-PSSnapin -PassThru VMware.VimAutomation.Core)) {
		# Error out if loading fails
		Write-Error "ERROR: Cannot load the VMware Snapin. Is the PowerCLI installed?"
		Exit
	}
}
# Start Global Definitions
$vSwitches =  New-Object System.Collections.ArrayList
$VIServer = "vCenter.test.lan"
$VIClusterName = "myCluster"
$vSwitchName = "vSwitch0"
$PortGroups = @(	("Vlan123", "123"),
			("Vlan456", "456"),
                    	("Vlan789", "789"))
# End Global Definitions

# Start vCenter Connection
Write-Host "Starting to Process vCenter Connection to " $VIServer " ..."-ForegroundColor Magenta
$OpenConnection = $global:DefaultVIServers | where { $_.Name -eq $VIServer }
if($OpenConnection.IsConnected) {
	Write-Host "vCenter is Already Connected..." -ForegroundColor Yellow
	$VIConnection = $OpenConnection
} else {
	Write-Host "Connecting vCenter..."
	$VIConnection = Connect-VIServer -Server $VIServer
}

if (-not $VIConnection.IsConnected) {
	Write-Error "Error: vCenter Connection Failed"
	Exit
}
# End vCenter Connection

# Start VI Object Validation
Write-Host "Starting to Process VI Objects in Cluster " $VIClusterName " ..."-ForegroundColor Magenta
If (!(Get-Cluster -Name $VIClusterName -ErrorAction SilentlyContinue)) {
    Write-Error "Error: Cluster Not Found"
    Exit
    }
$VICluster = Get-Cluster -Name $VIClusterName
$ESXiHosts = $VICluster | Get-VMHost | Where-Object { ($_.ConnectionState -eq 'Connected')}
If (($ESXiHosts).Count -lt 1) {
    Write-Error "Error: No Connected Hosts in Cluster found"
    Exit
    }
    Else {
    Write-Host ($ESXiHosts).Count " Hosts to Process in Cluster " ($VICluster).Name -ForegroundColor Green
    ForEach ($ESXiHost in $ESXiHosts){
        $vSwitches += $ESXiHost | Get-VirtualSwitch -Name $vSwitchName
        }
    If (($vSwitches).Count -lt 1) {
    Write-Error "Error: No Connected vSwitches on Hosts found"
    Exit
        }
        Else {
        Write-Host ($vSwitches).Count " vSwitches to Process on " ($ESXiHosts).Count " Hosts" -ForegroundColor Green
            }
    }
# End VI Object Validation

# Start Portgroup creation
Write-Host "Starting to Process "($PortGroups).Count " Portgroups on " ($ESXiHosts).Count " Hosts with " ($vSwitches).Count " vSwitches..." -ForegroundColor Magenta
foreach($PortGroup in $PortGroups){
    write-host "PortGroup to Process - Name =" $PortGroup[0] " VLAN =" $PortGroup[1]
    ForEach ($vSwitch in $vSwitches){
        write-host "vSwitch to Process - Name =" $vSwitch.Name " Host =" $vSwitch.VMHost
        If (!($vSwitch | Get-VirtualPortGroup -Name $PortGroup[0] -ErrorAction SilentlyContinue)){
            Write-Host "PortGroup Will be created..." -ForegroundColor Green
            $vSwitch | New-VirtualPortGroup -Name $PortGroup[0] -VLanId $PortGroup[1] | Out-Null
            }
            Else {
            Write-Host "PortGroup Already exists..." -ForegroundColor Yellow
            }
        }
   }
# End Portgroup creation