Have been able to boot and install from WDS VM. Had this happen once before as well but no idea how it resolved, just started working again.
I haven't touched the server since I last used it successfully.
Today when I attempted to boot a new VM from PXE I have been stuck at "Downloading NBP file..." during the PXE boot process. After about 5 minutes it comes to a "Contacting Server (192.168.4.108)" screen where again has sat so far for around 5 minutes.
Normal behaviour is it just boots, downloads this file in seconds and is at the Windows Setup within a few more seconds.
I've restarted the WDS services on it's server and rebooted the client multiple times, no change. Checked Logs on the WDS (Application, System) and nothing, no clue where to check specific to WDS...
What am I missing here? This is completely vanilla WDS, installed, added files from 2012 R2 disk and that's it. As said worked fine in the past, now magically not working and not the first time it's done this.