|Before you do anything else, you need to know the LAN IP of your existing router. The quick easy way to find that out is to open a command prompt window (ie: Start >> Run >> type cmd, and hit Enter) on a computer connected to your LAN. In the command prompt window type the following command:|
You're going to want to make note of the Default Gateway address that appears in the output of the ipconfig command. Also, make not of the Subnet Mask.
To configure the LAN IP of your second router you will need to first connect to it's management interface as per the setup guide or manual that came with it. Once connected to your router's management interface you're going to want to configure the LAN IP address so look for that setting.
If your first router's IP (the default gateway address) is 192.168.0.1 then use 192.168.0.2 on your second router. Ensure it's default gateway IP is 192.168.0.1 and the subnet mask is the same.
Once you have it configured, you can now connect it to the first router. You're going to want to plug your network cable into a LAN port in both routers.
If you need to, have a look at my how-to guide. To find it simply click on my name above in this response and read my “how-to” guide titled, “Add a second Router to your LAN”
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.