I have Linksys WRT1200AC (with OpenWrt on it) serving as the main router, and I wanted to use another Linksys router (WRT54GL, with BusyBox v1.15.3, openwrt-brcm-2.4-squashfs build) to extend the main router's WiFi to another part of house out of the main router's range (in the 2nd floor).
So, WRT54GL is placed in spot where there is still some coverage from the main router, and idea was that the wifi clients would connect to it, wirelessly.
The DHCP and firewall is managed by the main router, and I'd like all the clients to be in the same subnet.
I thought this recipe https://wiki.openwrt.org/doc/recipes/bridgedclient would be exactly what I was looking for, but, at least for me, it works only when I use wired connection to the WRT54GL.
I am not sure if WRT54GL is capable of doing what I want - to use wireless connection to both main router and serve as dumb access point, but if it is capable, I'd be happy to learn, how.