PowerCLI – creating port groups and specifications to modify port groups

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I wanted to quickly create some standard VM port groups across a particular vSwitch for all hosts in my lab / testing environment at work. Since I was using Standard vSwitches and not a dvSwitch, I didn’t feel like using the GUI to create these on every individual ESXi host. In addition to creating the port group on each vSwitch, I also wanted to change the security policy on each for Promiscuous mode to “Accept”. The reason for this being that this port group is going to be used to run virtual nested ESXi hosts, and this is required to allow nested VMs to communicate on the network.

 

So the obvious solution here for me was to create a quick PowerCLI script to create these port groups on all hosts and set the security option for each too. Here is the script:

 

$vSwitch = "vSwitch0"
$portgrpname = "vInception Portgroup"
$AllConnectedHosts = Get-VMHost | Where {$_.ConnectionState -eq "Connected"}

foreach ($esxihost in $AllConnectedHosts) {
	$currentvSwitch = $esxihost | Get-VirtualSwitch | Where {$_.Name -eq $vSwitch}
	New-VirtualPortGroup -Name $portgrpname -VirtualSwitch $currentvSwitch -Confirm:$false
	$currentesxihost = Get-VMHost $esxihost | Get-View
	$netsys = Get-View $currentesxihost.configmanager.networksystem
	$portgroupspec = New-Object VMWare.Vim.HostPortGroupSpec
	$portgroupspec.vswitchname = $vSwitch
	$portgroupspec.Name = $portgrpname
	$portgroupspec.policy = New-object vmware.vim.HostNetworkPolicy
	$portgroupspec.policy.Security = New-object vmware.vim.HostNetworkSecurityPolicy
	$portgroupspec.policy.Security.AllowPromiscuous = $true
	$netsys.UpdatePortGroup($portgrpname,$PortGroupSpec)
	
}

 
Keep in mind that this script will create the port group on “vSwitch0” – change this if your vSwitch that is hosting this port group on each host is named differently. It will obviously rely on this vSwitch existing to work. You can also modify the $portgrpname to your own choice of course.

Lastly, you can easily modify this script to change other Security options for the new port group, as the port group specification has already been created in this script. Just use the $portgroupspec.policy.Security object to add other specifications.

Enjoy!
 

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