2009
04.28

Creating new Virtual Port Groups in ESX with PowerShell

Category: Powershell Script, VMware / Tag: ,  / Add Comment

We frequently need to create new virtual port groups on our ESX hosts with VLAN tags which correspond to pre-assigned DHCP scopes. I wrote this to create the new VPG across all hosts.

$strNewVPG = "newVirtualPortGroup"
$strNewVlanTag = "123"
 
$ObjAllHosts = Get-VMHost | Sort-Object -Property Name
 
ForEach($objHost in $ObjAllHosts){
    $strVSwitch = Get-Virtualswitch -VMHost (Get-VMHost $objHost) | where-object { $_.Name -match "VMswitch" }
    Write-Host "Adding Virtual Port Group" $strNewVPG "with VLAN Tag" $strNewVlanTag "to" $objHost
    New-VirtualPortGroup -Name $strNewVPG -VirtualSwitch $strVSwitch -VLanId $strNewVlanTag
}

This assumes that your virtual port group is on a switch called “VMSwitch”. You could easily modify this to accept parameters from the command-line, rather than being specified in the .

When it comes to re-naming existing virtual port groups across hosts there doesn’t seem to be an inbuilt cmdlet, instead I wrote a to delete the old VPG, and create a new one with the same VLAN tag:-

$strOldVPG = "OldVPGName"
$strNewVPG = "NewVPGName"
$ObjAllHosts = (get-vmhost | Where-Object { $_.Name -notlike "e3acspacesxbu.lim.emea.dell.com" } | Sort-Object -Property Name)
ForEach($objHost in $ObjAllHosts){
    Write-Host " "
    Write-Host "Changing Virtual Port Group Settings on" $objHost
    $strVSwitch = Get-Virtualswitch -VMHost (Get-VMHost $objHost) | where-object { $_.Name -match "VMswitch" }
    $objOldVPG = Get-VirtualPortGroup (Get-VMHost $objHost) | where-object { $_.Name -match $strOldVPG }
    Write-Host "Removing Virtual Port Group" $objOldVPG
    Remove-VirtualPortGroup -VirtualPortGroup $objOldVPG -confirm:$false -whatif
    Write-Host "Adding Virtual Port Group" $strNewVPG "with VLAN Tag" $objOldVPG.VLanID
    New-VirtualPortGroup -Name $strNewVPG -VirtualSwitch $strVSwitch -VLanId $objOldVPG.VLanID -confirm:$false -WhatIf
}

Run it once to check it’s doing what you want, then remove the -WhatIf tags to run it for real.

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