I set up a wireless bridge a couple of years ago to connect two buildings (house and barn) with a pair of CPE 210s. The goal was to bring a solar panel web box (for data gathering into my LAN and connect it to the internet. It's worked great; so great, in fact, that I've forgotten exactly how it was set up. Now the bridge has failed. I have no idea why, but I'm also at a loss as to how to troubleshoot it. I can see the bridge's wifi network, and i can log into it. But I can't reach any of the devices (ping, etc.). The lights on the units are all on. So they appear to be talking to each other, but I can't directly contact any of the devices. On the house side of the bridge, the 210 is plugged into a LAN port on my home router. When this was working, I could ping the device in the other building) from my LAN. But that's unreachable now.

What steps should I take to troubleshoot this? Should I just reset them and start from scratch (Id rather not, but if that's the best thing to do, I'll bit the bullet).