I have charter cable and I am using a netgear router.The first thing I did was go to my computer,control panel,internet options,connections,lan settings check the box automatic detect lan setting,then I turned the computer off.I then connected my router to the cable modem and my computers to the router,first I turned the modem on,then the router on,then the computers on,the router recognized the modem and the computers and automacitally assigned ip addresses for each computer.I hope this helps