We have 4 Extremes and 1 Express wifi router setup around the office (15,000 SQ FT) all set up to extend the same network. Recently, one of the routers appeared to start sending out junk data and really interfered with the stability of the network. I reset it back to factory defaults and reconfigured to extend the existing network, but now it only wants to extend wirelessly even though it seems to be picking up an ethernet address. A second Extreme has started exhibiting the same symptoms. Is there an upper limit of the routers possible on a network? Is there a magic sequence of settings I should make sure that are enabled (beyond Bridge in the NAT settings)? If it was just one router, I could accept that there's a hardware flaw going on... but two in recently purchased as new devices?