board_config_update
case "$board" in
+gw,gw610x|\
+gw,gw6903)
+ ucidef_set_interfaces_lan 'eth0'
+ ;;
+gw,gw620x|\
+gw,gw630x)
+ ucidef_set_interfaces_lan_wan 'eth0' 'eth1'
+ ;;
+gw,gw640x)
+ ucidef_set_interfaces_lan_wan 'eth0 eth1 eth2 eth3' 'eth4'
+ ;;
esac
board_config_flush