diff --git a/openmptcprouter/files/etc/uci-defaults/1920-omr-network b/openmptcprouter/files/etc/uci-defaults/1920-omr-network
index 54c41519c..d9b306a57 100755
--- a/openmptcprouter/files/etc/uci-defaults/1920-omr-network
+++ b/openmptcprouter/files/etc/uci-defaults/1920-omr-network
@@ -113,17 +113,17 @@ if [ "$(uci -q get network.wan1.multipath)" = "" ]; then
 			_setup_wan_interface wan2 lan1 on
 
 			_macaddr=$(uci -q get "network.lan0.macaddr")
-			_setup_macaddr "wan1" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/')}"
+			_setup_macaddr "wan1" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed -e 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/' -e 's/^\(.\)[13579bdf]/\10/')}"
 			_macaddr=$(uci -q get "network.lan1.macaddr")
-			_setup_macaddr "wan2" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/')}"
+			_setup_macaddr "wan2" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed -e 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/' -e 's/^\(.\)[13579bdf]/\10/')}"
 			if [ -d /sys/class/net/lan2 ] || [ -n "$(ip link | grep ' lan2')" ]; then
 				_setup_wan_interface wan3 lan2 on
 				_macaddr=$(uci -q get "network.lan2.macaddr")
-				_setup_macaddr "wan3" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/')}"
+				_setup_macaddr "wan3" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed -e 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/' -e 's/^\(.\)[13579bdf]/\10/')}"
 				if [ -d /sys/class/net/lan3 ] || [ -n "$(ip link | grep ' lan3')" ]; then
 					_setup_wan_interface wan4 lan3 on
 					_macaddr=$(uci -q get "network.lan3.macaddr")
-					_setup_macaddr "wan4" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/') }"
+					_setup_macaddr "wan4" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed -e 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/' -e 's/^\(.\)[13579bdf]/\10/')}"
 				fi
 			fi
 		else
@@ -141,18 +141,18 @@ if [ "$(uci -q get network.wan1.multipath)" = "" ]; then
 			_setup_wan_interface wan2 wan2 on
 
 			_macaddr=$(uci -q get "network.wan1.macaddr")
-			_setup_macaddr "wan1" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/')}"
+			_setup_macaddr "wan1" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed -e 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/' -e 's/^\(.\)[13579bdf]/\10/')}"
 			_macaddr=$(uci -q get "network.wan2.macaddr")
-			_setup_macaddr "wan2" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/')}"
+			_setup_macaddr "wan2" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed -e 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/' -e 's/^\(.\)[13579bdf]/\10/')}"
 
 			if [ -d /sys/class/net/wan3 ] || [ -n "$(ip link | grep ' wan3')" ]; then
 				_setup_wan_interface wan3 wan3 on
 				_macaddr=$(uci -q get "network.wan3.macaddr")
-				_setup_macaddr "wan3" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/')}"
+				_setup_macaddr "wan3" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed -e 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/' -e 's/^\(.\)[13579bdf]/\10/')}"
 				if [ -d /sys/class/net/wan4 ] || [ -n "$(ip link | grep ' wan4')" ]; then
 					_setup_wan_interface wan4 wan4 on
 					_macaddr=$(uci -q get "network.wan4.macaddr")
-					_setup_macaddr "wan4" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/') }"
+					_setup_macaddr "wan4" "${_macaddr:-$(dd if=/dev/urandom bs=1024 count=1 2>/dev/null | md5sum | sed -e 's/^\(..\)\(..\)\(..\)\(..\)\(..\)\(..\).*$/\1:\2:\3:\4:\5:\6/' -e 's/^\(.\)[13579bdf]/\10/')}"
 				fi
 			fi
 		else