nvram get wan_gateway | grep -q '^xxx\.xxx\|^yyy\.yyy\|^zzz\.zzz'
while [ $? != 0 ] ; do
led amb on
service wan restart
sleep 2s
nvram get wan_gateway | grep -q '^xxx\.xxx\|^yyy\.yyy\|^zzz\.zzz'
done
led amb off
led white on