vi /etc/config/network
config interface 'lan'
        option type 'bridge'
        option ifname 'eth0'
        option proto 'static'
        option netmask '255.255.255.0'
        option ip6assign '60'
        option ipaddr '192.168.1.78'
        option delegate '0'
        option gateway '192.168.1.1'
        option dns '223.5.5.5'
# /etc/init.d/network restart
或者 
http://192.168.1.78/cgi-bin/luci 管理界面,设置向导>网络设置