Router config like switcher + Pi-Hole DNS

Hallo, please I tryied to set up router TP-Link like dumb switcher but without success.
I have router with gate 192.168.75.1, Pi-hole running on ODROID (similar to Raspberry) with IP adress 192.168.75.228. TP-Link Archer C6 v3 with stock firmware in AP mode doing switcher (radio off) perfectly. But when i flash new FW OpenWRT 23.05.0 and i do everthing (step-by-step) in according to this tutorial: https://openwrt.org/docs/guide-user/network/wifi/dumbap
I cannot connect to internet, cannot pinging to gate in main router., nothing. DHCP IPv4 and IPv6 disable od course. IP on TP-Link is 192.168.75.3 like on the main router (DHCP server manualy gives 192.168.75.3).
In OpenWRT is necesarry fill IP of Pi-hole DNS, where? It can be problem..
Thanks for your advice! Tom

from where?

what gate ?

if it's a DHCP server, it's not manual ?

move the ethernet cable from the TP-Links WAN port, to one of the LAN ports ?

technically, a dumb AP doesn't need internet access, and it won't affect the clients.

Better will be picture :slight_smile:

Thanks.

no better to move the ethernet cable, as you were told.
unless you moved the wan interface to lan.

I like your picture though nice and clean :wink:

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I will execute the order :slight_smile: Sir. Thx