ping -c 15 192.168.10.1  > /dev/null 2>&1
if [ $? -eq 0 ]; then
   route -n | grep 192.168.10.1 > /dev/null 2>&1
   if [ $? -eq 1 ]; then
        route del default gw 192.168.1.1 && route add default gw 192.168.10.1
   fi
else
   route del defult gw  192.168.12.3 && route add defualt gw  192.168.1.1
fi