Hi All - xFi works on wifi, no problem. I have an HP switch/dumb - and I was using Comcast Business - and never had a problem. Now when I add more than 2 ports to the switch, the router drops the wired connection completely. Switched to different ports. Switched out router as well. I feel that this must be a software issue. I have tried to vary what I connect. I am using HP 24x1Gb switches, Ubiquiti Wifi, and have Sonos and Tivo connected as well. But when I test, I just connect my Desktop and then my wife's desktop - that works. Then one more - and I have tried varying what I plug in - and the whole thing collapses. Help. I am network savvy but can't figure this out.