diff --git a/src/packages/fff/fff-network/files/etc/uci-defaults/20-migrate-gl-ar150 b/src/packages/fff/fff-network/files/etc/uci-defaults/20-migrate-gl-ar150
new file mode 100644
index 00000000..fd7e731d
--- /dev/null
+++ b/src/packages/fff/fff-network/files/etc/uci-defaults/20-migrate-gl-ar150
@@ -0,0 +1,12 @@
+# The GL-AR150 was converted from ONEPORT to TWOPORT.
+# Copy ETHMODE to LAN1MODE ("LAN"-Port) and set LAN0MODE ("WAN"-Port) to WAN to retain the configured behaviour for upgraded devices.
+if [ -s /etc/network.config ] ; then
+	. /etc/network.config
+
+	# Ensure ETHMODE contains a sensible value. Use default behaviour (CLIENT) otherwise.
+	[ "$ETHMODE" != "BATMAN" ] && [ "$ETHMODE" != "CLIENT" ] && [ "$ETHMODE" != "WAN" ] && ETHMODE="CLIENT"
+
+	echo "LAN0MODE='WAN' # use BATMAN, CLIENT or WAN" > /etc/network.config
+	echo "LAN1MODE='$ETHMODE' # use BATMAN, CLIENT or WAN" >> /etc/network.config
+	echo "FORCEPARSE='2' # Parse at: 0=first boot only, 1=every reboot, 2=next reboot (once)" >> /etc/network.config
+fi
diff --git a/src/packages/fff/fff-network/mips/network.glinet,gl-ar150 b/src/packages/fff/fff-network/mips/network.glinet,gl-ar150
index 1782d4ea..d88673c1 100644
--- a/src/packages/fff/fff-network/mips/network.glinet,gl-ar150
+++ b/src/packages/fff/fff-network/mips/network.glinet,gl-ar150
@@ -2,12 +2,8 @@
 
 WANDEV=eth1
 SWITCHDEV=eth0
-WAN_PORTS=
-BATMAN_PORTS="0t"
-CLIENT_PORTS="0t"
+TWO_PORT=YES
 
 ETHMESHMAC="$(macFlipLocalBit $(cat /sys/class/net/eth0/address))"
 
 . /etc/network.mode
-
-ETHPORT=1