ip="14.215.177.39"
dns2="211.136.20.203"
pppd call huawei-dial &
sleep 12
while true
do
	echo "test"
	ping -s 1 -c 1 $ip
	
	if [ "$?" != "0" ]
	then 
		echo "fail ,ping again"
		ping -s 1 -c 2 $dns2
		if [ "$?" != "0" ]
		then
			echo "fall kill pppd,and call again"
			killall pppd
			pppd call huawei-dial &
			sleep 12
		else
			sleep 5
		fi
	else
		sleep 5
	fi
done