I'm trying to turn my Asus NT-N65U into a repeater. I've been at it for hours, following all sorts of slightly different guides, but the problem I keep coming back to is that I can't change my LAN IP. I've found other threats about it here, but haven't been able to find a solution.
The primary router is 192.168.1.1. So, I am trying to change the repeater-box to 192.168.0.X. I have been using LuCI (I'm not familiar with command line) to change it in the Interfaces>LAN config menu. Each time I try it, LuCI times out. It's not able to apply rollback, either. I can't connect to the repeater-box with either the old or the new IP until I restart the repeater-box and wait for awhile.
Have you tried factory resetting the Asus?
ie. power up Asus. Wait a minute for OpenWRT to load up. Now hold Reset button down for about 10 seconds and release the button immediately when the Power light changes behaviour. Now try and change the LAN IP address with LuCI when the router starts up.
(If you are a Windows user, you can use WinSCP to access and edit the /etc/config/network file)