[OpenWrt Wiki] OpenWrt as router device
openwrt.org › docs › guide-userOct 17, 2021 · In General Setup tab, in IPv4 address type in the desired static IP address for the LAN interface of your OpenWrt Router, if your main router's address is 192.168.1.1 (most common), set the IP address of your OpenWrt router LAN interface to 192.168.2.1 (or to something that isn't 192.168.1.X, anyway).