I have recently completed a renovation of my home, during which the addition and parts of the existing house were wired for Cat 5e and coax. I now have my cable feed coming into the basement rather than through a hole in the office wall. That feed is now connected to my modem in the basement, and all 11 or 12 ethernet feeds from the house come into the same utility room. I don't need them all at this time, and might not ever. Currently I have the following rooms active: Office with iMac Master with Directv DVR Media Room with Directv DVR, Airport Extreme Gigabit Base Station, Apple TV, Networkable Samsung TV I also have an older 3Com 8 Port Dual Speed Hub in the basement. I attempted connecting the hub to the cable modem and then each of the active room feeds to it. For some reason, the TV in the master is getting an IP address through the hub from the cable modem, while the TV in the media room did, and then it stopped working. I tried putting my base station in the basement connected directly to the modem, with a LAN port connected to the hub, and then connecting various rooms to the hub but the media room was still getting a self-assigned IP. So I moved the Airport to the media room which is on the main level and I would prefer to have the broadcast from there, plus it acts as a router giving me three out ports, to my DVR, Apple TV, and TV set. However, now when I hook up my iMac via ethernet in the office to the wall and then connect its cable to the hub in the basement it goes self assigned as well. Not sure why the master TV DVR is getting an IP, but the iMac won't and the Airport will. The Airport is connected to the wall in the media room which is wired to the hub in the basement, but is somehow getting the message through to the modem to pull a valid IP. So I am not sure what config I need and what I should replace the hub with. Do I need a 4 or 8 port router? If so, will my iMac connected via wiring to the router, talk to the Apple TV connected to my Airport in the media room? I would prefer to be able to stream data to the Apple TV over ethernet rather than wireless. Any feedback or help would be greatly appreciated. Thanks.