diff --git a/target/linux/ar71xx/base-files/etc/defconfig/dir-825-b1/network b/target/linux/ar71xx/base-files/etc/defconfig/dir-825-b1/network
index 48477fab19..79f4799f94 100644
--- a/target/linux/ar71xx/base-files/etc/defconfig/dir-825-b1/network
+++ b/target/linux/ar71xx/base-files/etc/defconfig/dir-825-b1/network
@@ -5,7 +5,7 @@ config interface loopback
 	option netmask	255.0.0.0
 
 config interface lan
-	option ifname	eth0
+	option ifname	eth0.1
 	option type	bridge
 	option proto	static
 	option ipaddr	192.168.1.1
@@ -23,4 +23,4 @@ config switch
 config switch_vlan
 	option device	rtl8366s
 	option vlan 	1
-	option ports	"0 1 2 3 5"
+	option ports	"0 1 2 3 5t"
diff --git a/target/linux/ar71xx/base-files/etc/defconfig/wndr3700/network b/target/linux/ar71xx/base-files/etc/defconfig/wndr3700/network
index 52260e74e8..d05fdf3425 100644
--- a/target/linux/ar71xx/base-files/etc/defconfig/wndr3700/network
+++ b/target/linux/ar71xx/base-files/etc/defconfig/wndr3700/network
@@ -5,7 +5,7 @@ config interface loopback
 	option netmask	255.0.0.0
 
 config interface lan
-	option ifname	eth0
+	option ifname	eth0.1
 	option type	bridge
 	option proto	static
 	option ipaddr	192.168.1.1
@@ -25,7 +25,7 @@ config switch
 config switch_vlan
 	option device	rtl8366s
 	option vlan 	1
-	option ports	"0 1 2 3 5"
+	option ports	"0 1 2 3 5t"
 
 config switch_port
 	# Port 1 controls the GREEN configuration of LEDs for
diff --git a/target/linux/ar71xx/base-files/etc/defconfig/wzr-hp-g300nh/network b/target/linux/ar71xx/base-files/etc/defconfig/wzr-hp-g300nh/network
index 48477fab19..79f4799f94 100644
--- a/target/linux/ar71xx/base-files/etc/defconfig/wzr-hp-g300nh/network
+++ b/target/linux/ar71xx/base-files/etc/defconfig/wzr-hp-g300nh/network
@@ -5,7 +5,7 @@ config interface loopback
 	option netmask	255.0.0.0
 
 config interface lan
-	option ifname	eth0
+	option ifname	eth0.1
 	option type	bridge
 	option proto	static
 	option ipaddr	192.168.1.1
@@ -23,4 +23,4 @@ config switch
 config switch_vlan
 	option device	rtl8366s
 	option vlan 	1
-	option ports	"0 1 2 3 5"
+	option ports	"0 1 2 3 5t"