I do set my printers with a static IP address. That may make a difference with the fax and scanner.
I know that one time while playing with this stuff, the scanner did not work. But it was found ok from the PCC choice for instlling scanners once I got the printer installed.
This only happened one time. Later, it always just installed the scanner along with the printer.
That is why I said to experiment using the LiveCD. You always start from a known point.