This has worked for us in the past, but we recently tried out AT&T U-Verse out (claimed fiberoptic. Was fiberoptic up to the box down the street, then it came in on phone lines.) Upon going back to Comcast (which never left, just got rid of the AT&T stuff) we hooked our stuff up, and the connection no longer works. ____xBox 360 | Modem -- Router -- Linksys 10/100 Workgroup Switch ------My Computer | ----My Dad's Computer We can connect wirelessly to the router, but not through the switch. Main reason we originally go the switch was because none of our computers are close enough for the 50' ethernet cable. Running diagnosis says "Local Area Connection doesn't have a valid IP Configuration."