PowerCLI Mass VM Port Group Change

1.    First off, you will have to declare your variables once you are logged into the vCenter server. You do this by the following:
    a.    You can declare your cluster variable with: $Cluster = “TestCluster”
    b.    You can then you can declare your old network with: $OldNetwork = “TestPG”
    c.    Finally, set the variable for the new network with: $NewNetwork = “NewTestPG”

2.    Now your variables are set and you can now pull them in the following script:
    a.    Get-Cluster $Cluster |Get-VM |Get-NetworkAdapter |Where {$_.NetworkName –eq $OldNetwork} |Set-NetworkAdapter –NetworkName $NewNetwork –Confirm:$false

3.    That is for clusters, if you just want to do all your VMs, you can do the following:
    a.    Declare your variables:
        i.    Set your variable for the old PortGroup: $OldNetwork = “TestPG”
        ii.    Set the variable for the new PortGroup: $NewNetwork = “NewTestPG”

4.    Now you set your variables for your port groups, you can go ahead and execute your script with the declared variables:
    a.    Get-VM |Get-NetworkAdapter |Where {$_.NetworkName –eq $OldNetwork} |Set-NetworkAdapter –NetworkName $NewNEtwork –Confirm:$false

5.    You should see the process go through in the PowerCLI area and also you should see it in vCenter.