Context:
I have my main router (MAIN) from my ISP which is not connected to the internet due to the outage. My BerylAX (BERYL) was connected to MAIN and I would normally just connect to its Wi-Fi network from my laptop and do business as usual. Since the outage, BERYL was flashing blue and I wasn't able to connect to it. I would have thought that I could connect to BERYL and it wouldn't be able to connect to the Internet, but that wasn't the case.
Presumably, this is because BERYL has a WireGuard client running. If not that, it could be because it's part of the same Tailnet as my laptop and Tailscale is a bit finnicky.
After un- and re-plugging BERYL a couple of times, waiting sufficiently long while it was unplugged, it still wouldn't let me connect to it.
Just now, I decided to connect BERYL to my Mudi V2 (MUDI) via ethernet, which has a SIM card in it and is able to provide Internet connection. My laptop is also connected to BERYL via ethernet.
I can now access the admin panels of both routers, and I can ssh into BERYL and ping 8.8.8.8 and get responses, but I still cannot ping BERYL unless I'm connected to it via ethernet. It's still not broadcasting a network. I even disabled and re-enabled the Wi-Fi networks from BERYL's admin panel, and I don't see them.
I'm very curious what exactly went wrong, and how to fix it besides nuking my device.
Edit: I just tried disconnected the ethernet between MUDI and BERYL and set up the latter to be a repeater for MUDI but just as soon as I did, it struggled to find the wifi from MUDI (which exists as my laptop is connected to it). I restarted again BERYL but it still is failing to connect to MUDI via the repeater setting and it's failing to display a wifi connection to my laptop.