The Internet says that there are open, do not open also have, mine is open, open is not open depends on you. DHCP is not enabled, then your computer's IP acquisition will be allocated by the upper level network. If this is enabled, you will have to reassign your IP address segment. And cannot be repeated with the upper level.
This is something you may not have read about. Just tell you to turn it on or turn it off.
See here, you'll understand. To open, you have to fill in the IP of the upper-level route as a gateway, fill in its DNS, and stagger the address pool on the line. Remember the extra points!