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

Change-Id: Ia14632a24eb4e8ddf720d8f53f2fe3a1b52a0a8e
diff --git a/ap/app/Script/scripts/psext_updown.sh b/ap/app/Script/scripts/psext_updown.sh
index 890a6f1..56f4103 100755
--- a/ap/app/Script/scripts/psext_updown.sh
+++ b/ap/app/Script/scripts/psext_updown.sh
@@ -277,7 +277,7 @@
 		get_netmask_btrunk $pdp_ip
 	fi
 	
-	ifconfig $ps_if $ps_ip up 2>>$test_log
+	ifconfig $ps_if $ps_ip netmask 255.255.255.0 up 2>>$test_log
 	if [ $? -ne 0 ];then
 	    echo "Error: ifconfig $ps_if $ps_ip up failed." >> $test_log
     fi