Powershell - Automatically Create virtual Networking in Hyper-V
I’ve rebuilt my test lab a number of times and have gotten sick of setting up my NICs and VLANs, etc over and over in Hyper-V.  This Powershell script will build a virtual switch for each network device on your host system, binding physical adapters and needed, and then adds each VM to each switch.  Easy peasy!
Function Build-Networks{
$NetworkAdapters = Get-NetAdapter Get-NetAdapter | % {
New-VMSwitch -Name ($_.Name + " External Connection") -NetAdapterInterfaceDescription $_.InterfaceDescription
}
}
Build-Networks
Get-VM | % {
$vm=$_.Name;
Get-VMSwitch | % {
Add-VMNetworkAdapter -ComputerName $vm -SwitchName $_.Name}} # add one nic per switch
Get-VM | Get-VMNetworkAdapter | ? SwitchName -eq $null | Remove-VMNetworkAdapter # remove null nic
