Completely solve the dual-routing Internet Skills _ routers, switches

In fact, you answer this
[1] The Export connection
[2] is equal to the second router as a switch to use
Before connecting, you can use a single machine to connect to router 2nd to see the instructions for two routers. If their default IP is the same, modify the
[2] The intranet IP can be easily filled out because you're just used as a switch
Another way is to isolate machines that are connected to different routers, as the second floor says.
This is the way.
[1] An outlet connection
[2] Entrance
For example this time 1 IP is 192.168.1.1 can be
[2] The WAN port is set to 192.168.1.254 2 intranet IP for another segment 192.168.0.1 this time the machine connected to 2, as long as the 192.168.0.x network segment IP can be online pull