root@OpenWrt:/# cat /etc/config/network

config 'interface' 'loopback'
        option 'ifname' 'lo'
        option 'proto' 'static'
        option 'ipaddr' '127.0.0.1'
        option 'netmask' '255.0.0.0'

config 'interface' 'lan'
        option 'proto' 'static'
        option 'ipaddr' '192.168.5.1'
        option 'netmask' '255.255.255.0'
        option 'type' 'bridge'
        option '_orig_ifname' 'eth1 wlan0'
        option '_orig_bridge' 'true'
        option 'ifname' 'eth1'

config 'interface' 'wan'
        option 'ifname' 'eth0'
        option 'proto' 'dhcp'