How to configure multiple vro connections

Although the whole router has been set up many times, but each time there are a variety of problems, so make a record to the TP-LINK as an example of the problem: My 841N, the main line begins to connect to the LAN Network (pulling the landlord's network cable, that is, the second-level route), and then closes DHCP. At first, you can connect the computer to the wireless network or the mobile phone to the wireless network, after about 10 minutes, my mobile phone could not be connected. My android and my wife's iphone could not be connected. I don't know why, but the computer could be wireless. Then you can set it with the following method (the second-level routing method is used). You don't know if you are using 710N or 740N, I can see the 740N icon in the settings interface... If it is 710N, reset and use AP mode. Modify the Wireless Parameters. If it is 740N, there are two connection modes: 1. Perform a secondary route: connect to the wan port, set the WAN port to automatically retrieve, change the LAN port to 192.168.2.12, and set the LAN port to 192.168.1.2-254, if you disable the DHCP function, you can set it according to these methods. My method is 841N.