Now I do need some advice. Playing around with my recent install, trying to relay, I made the mistake of deleting the LAN interface. Now I can't get an IP via WiFi, and via Ethernet there is no peer on the other end.
I run an EAP600. Before trying a hard reset, I wonder if there is any other chance? Would the OpenWRT-firmware react properly on that hard reset?
TIA
Failsafe login, fix the mistake, reboot normally.
Use web interface to take advantage of roll back.
Thanks, but I don't get an IP to access the AP. It times out while trying to obtain one.
There is no other machine on the network 192.168.1.0/24. Only my PC.
Did you try to connect with serial? If you did and didn't help you, then reset looks inevitable.
No. not yet. Serial with EnGenius EAP600 ... I would have to open the casing, and read up on how to do serial with that AP. There is no 'normal' serial port nor USB.
Before I panic, and do unreasonable things; or even make things worse: How would the OpenWRT firmware behave on a hard reset?
I would expect it to be reset to defaults without any way to restore the existing configuration, unless there is off-the-device backup.
No worries, I have a backup of the config. I'll give it a shot, and if not, I'll have another paper weight.
Thanks for the support, the hard reset brought up the OpenWRT default setup, as hoped for.
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Thanks! 
I recently discovered a fail-safe for my own network. The wireguard connection allows me to access my router via the wan interface. If I ever accidentally mess up the vlans or lose local lan access, I can access the router via wireguard to fix things.
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