I successfully installed OpenWrt in Xiaomi 4A router following instructions from here.
The previous setup is to have the Xiaomi router get internet from wireless (from my main router), then provide via ethernet cable internet to a PC. Xiaomi router doesn't support IPv6 that's why I tried OpenWrt.
Now, OpenWrt is installed but I am not able to have the same subnet in my PC as my main router.
What I did after reset:
Network -> Wireless -> Scan both wlan24 and wlan5 for my wireless, found, added it. It has two new entries in "client" mode.
Network -> Interfaces -> LAN -> it has a static of 192.168.1.1 and it assigns my PC that subnet, say 192.168.1.1 (how does this get internet from my Wlan?).
When I put this static to 192.168.10.1 and disable DHCP server, then the router is no more accessible, I have to reset it through the button.
Is the configuration I 'd want possible with openwrt?