<#
Creates PG-VLAN port groups on a vSwitch.

Required parameter:
  -SwitchName   Name of the existing standard vSwitch.

Example:
  .\Create-PortGroups.ps1 -SwitchName vSwitch0
#>
[CmdletBinding()]
param(
    [Parameter(Mandatory = $true)]
    [string]$SwitchName
)

$ErrorActionPreference = 'Stop'

$portGroups = @(
    @{ Name = 'PG-VLAN10';   VlanId = 10   },
    @{ Name = 'PG-VLAN11';   VlanId = 11   },
    @{ Name = 'PG-VLAN12';   VlanId = 12   },
    @{ Name = 'PG-VLAN20';   VlanId = 20   },
    @{ Name = 'PG-VLAN21';   VlanId = 21   },
    @{ Name = 'PG-VLAN23';   VlanId = 23   },
    @{ Name = 'PG-VLAN30';   VlanId = 30   },
    @{ Name = 'PG-VLAN51';   VlanId = 51   },
    @{ Name = 'PG-VLAN114';  VlanId = 114  },
    @{ Name = 'PG-VLAN211';  VlanId = 211  },
    @{ Name = 'PG-VLAN1130'; VlanId = 1130 },
    @{ Name = 'PG-VLAN1138'; VlanId = 1138 }
)

$switch = Get-VirtualSwitch -Name $SwitchName -ErrorAction Stop

foreach ($pg in $portGroups) {
    $existing = Get-VirtualPortGroup -VirtualSwitch $switch -Name $pg.Name -ErrorAction SilentlyContinue

    if ($existing) {
        Write-Host "$($pg.Name) already exists"
        continue
    }

    New-VirtualPortGroup -VirtualSwitch $switch -Name $pg.Name -VLanId $pg.VlanId | Out-Null
    Write-Host "Created $($pg.Name) with VLAN $($pg.VlanId)"
}