[Feature][ZXW-76]merged P48U04 base code

Change-Id: Ia14632a24eb4e8ddf720d8f53f2fe3a1b52a0a8e
diff --git a/ap/app/Script/scripts/wan_ipv4.sh b/ap/app/Script/scripts/wan_ipv4.sh
index e5f7446..e4c5a40 100755
--- a/ap/app/Script/scripts/wan_ipv4.sh
+++ b/ap/app/Script/scripts/wan_ipv4.sh
@@ -113,7 +113,7 @@
 		if [ $? -ne 0 ];then
 	        echo "Error: ifconfig $wan_if down failed." >> $test_log
         fi
-		ifconfig $wan_if $pswan_ip up 2>>$test_log
+		ifconfig $wan_if $pswan_ip netmask 255.255.255.0 up 2>>$test_log
 		if [ $? -ne 0 ];then
 	        echo "Error: ifconfig $wan_if $pswan_ip up failed." >> $test_log
         fi