I have been searching for a way to create new web farms add add servers to it with PowerShell.
I stumbled on this link http://www.iis.net/learn/web-hosting/microsoft-web-farm-framework-20-for-iis-7/web-farm-framework-20-for-iis-cmdlets-for-windows-powershell which says that you should add a snapin called WebFarmSnapin.
But this does not seem to work at all in powershell v3.0 because it only says:
Add-PSSnapin : No snap-ins have been registered for Windows PowerShell version 3.
Does anyone know how to manage web farms in PowerShell v3.0?
At last I found a way to do this!
http://brentdacodemonkey.wordpress.com/2014/02/12/automating-arr-configuration/
You can generate a script from the Configuration Editor in IIS Manager. But the funny thing is that on my Windows 7 machine I could not generate PowerShell scripts. I had to do it directly on the 2012 server.