I am seeing a lot of this issue, so here is the ME TOO!! My bridge lost connection and will no longer obtain an IP address. I have tried several paths to resolve this. I verified on the switch that I a getting connected and it is showing up as 10/half. I also verified that other devices work with this cat5 and switch configuration. I also tried connecting directly to my SonicWALL and bypassing all other connections but it doesn't connect. I have a blue steady light on both sides an one side flashes about every 30 seconds or so. I assume this is the sensor side. On the cat5 connection, I am getting the connection lights, so I know it isn't an issue there. This setup has been working fine for very long time and just quit out of the blue.