diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
index 3d9107799..86ac13a62 100644
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
@@ -88,7 +88,6 @@ ramips_setup_interfaces()
 	xiaomi,mi-router-cr660x)
 		ucidef_add_switch "switch0" \
 			"0:lan:1" "1:lan:2" "2:lan:3" "4:wan" "6@eth0"
-		ucidef_set_interface_lan "eth0.1"
 		;;
 	zyxel,nr7101)
 		ucidef_set_interfaces_lan_wan "lan" "wan"
@@ -191,6 +190,10 @@ ramips_setup_macs()
 		wan_mac=$label_mac
 		lan_mac=$(macaddr_add $label_mac 1)
 		;;
+	xiaomi,mi-router-cr660x)
+		lan_mac=$(cat /sys/class/net/eth0/address)
+		wan_mac=$(mtd_get_mac_binary factory 0x3fffa)
+		;;
 	xiaoyu,xy-c5)
 		wan_mac=$(macaddr_add "$(mtd_get_mac_binary factory 0x4)" 1)
 		;;