--- /dev/null
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+. /lib/functions/uci-defaults.sh
+
+board_config_update
+
+case "$(board_name)" in
+comtrend,ar-5315u |\
+comtrend,ar-5387un |\
+comtrend,vr-3025u)
+ ucidef_set_interface_lan "lan1 lan2 lan3 lan4"
+ ;;
+esac
+
+board_config_flush
+
+exit 0