I just finished zippering 4 new DVR-80s and am now in the process of updating the in home wiring infrastructure to accomodate the new coax and network drops required. I have encountered a strange issue; maybe some of the networking gurus have seen this / can help me diagnose and fix. When I first set everything up, I just made network cables and pulled them through the house (BAD WAF, BTW) from each tivo to an 8 port switch (linksys) in the living room. This switch is hard wired back to port 2 on my linksys router / WAP. Everything works like a champ. All the Tivos can see one another / exchange shows. I can ping the Tivos from my main desktop PC (port 1 on the router). All of the Tivos can see the file server (connected to the same 8 port switch that they are). Now that I am trying to complete the in-wall routing, it would be FAR more convenient to connect one of the new Tivos to a seperate 5 port switch that is upstairs (port 4 of the router). However, when I unplug this Tivo from the 8 port switch in the living room, and plug it into the 5 port switch upstairs, it can no longer "see" any of the other Tivos or the file server!!! I have tried resetting the router, and re-booting the Tivo. I even tried connecting the Tivo DIRECTLY into port 4 of the router (bypassing the switch upstairs). STILL no connection. Can't network, can't ping, can't Telnet, can't FTP. Any advice? Thanks!