Network loop on TP-Link Re200 extender

[awhile7814]

Hi everyone,
This is my first message on the forum. Thanks to anyone who will take some time to reply.

So, I installed OpenWrt on my TP-Link Re200 v2 extender. Worked fine. Then, I followed the steps laid out in this guide: Wi-Fi Extender/Repeater with WDS, to set it up as an extender once again (but with free software running on it :-).

I followed the guide (via LuCi) up to this point:

Go to Network, DHCP and DNS, Forwards. Set DNS forwardings to the IP address of the access point.

I may have followed the step right after, too, although I'm not sure ("Go to Network, Interfaces, lan, Edit. Set IPv4 gateway to the IP address of the access point").

Then, I saved the configuration, without having enabled STP. Then, my router wasn't accessible anymore (neither via ethernet cable at 192.168.1.1, nor via Wi-Fi at its assigned local address).
I guess I created the "network loop" that is described in the guide.

Could you please help me out in fixing this?

[slh]

Extender setups are easy to get wrong, especially if you're new to OpenWrt, you may have to reset a couple of times until you reach a working configuration.

[OpenWrt Wiki] Failsafe mode, factory reset, and recovery mode

[awhile7814]

Thank you, that got me out of the loop, as I was able to reset.

For future reference

The LEDs on the Tp-link Re200 flashed as follows:

1. all lights on
2. power light on, 10 secs
3. no lights, 10 secs
4. fast paced flickering (5 Hz), 4 secs
5. medium paced flickering (2.5 Hz)

To get into failsafe mode, I pressed the RESET button during the fast paced phase. Entering failsafe made the lights flicker even faster (10 Hz).

I set a static IP. Then, ssh didn't work (Bad server host key: Invalid server length) (does anyone know why?) but I made it in with dropbear.

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Edit: I don't yet have permission to edit my first post; the Extender/Repeater guide is at https://openwrt.org/docs/guide-user/network/wifi/wifiextenders/wds