I did something dumb recently. I had a network failure at my ISP, so I had to kill my dhclient and restart it. After restarting, everything seemed cool – until I reset my Ubiquiti AP. At that point, the AP entered the “Restarting” state and never came out.
After a few minutes of poking around on the Ubiquiti management screen, I saw this:
Apparently I killed off my DHCP server too. Oops.
One restart of the DHCP server later, my AP was back online (it detected when the DHCP server started). Some day I really should put the AP on its own static IP. That’s what I get for being lazy…