I am trying to setup 3 network printers for a client. He has an Xfinity modem / router, and there is only 1 free ethernet port available on the router. To avoid buying a switch, I used an old router he had lying around. I plugged in the 3 network printers into ports 2, 3, and 4. When plugging the WAN port from the old router to the empty port on the Xfinity modem / router none of the printers show... (more)