Can two routers be used from one modem?
The short answer is yes, depending on how you want to use them. The basic layout for using two routers with one modem is that you have the first router connected to the modem and the second router connected to the first router and the computers or devices you are using. It will look like: ModemàFirst RouteràSecond RouteràComputers. In this case, the second router is basically working as a hub or switch - basically a glorified extension cord that will allow you to use more devices than you can with one router alone. If you have two routers lying around and want to configure them this way, great. If you want to set up your network from scratch, you may be better off using one router and one switch both for ease and expense considerations.
Find IP Addresses
In order to configure the two routers properly, you are going to need to know the LAN addresses of each one. Most routers come with a default standard address: Linksys uses 192.168.1.1, D-Link and Netgear use 192.168.0.1. The address is usually with the paperwork that came with the router, or you can find it on the computer by going to Start, then All Programs and Accessories. At the Command Prompt, type in: ipconfig and press Enter. Look for the Default Gateway and you will see the correct address.
Disable DHCP
DHCP stands for Dynamic Host Configuration Protocol, and basically means that it allows the server to automatically assign an IP address. You need to disable the DHCP in the second router in order for the system to work properly. This is the example for Linksys, but it works basically the same way for any router.
Connect an Ethernet cable from a computer to one of the Ethernet ports on the router. Power up the router, then power up the computer. Open Internet Explorer and type in the IP address in the browser. For Linksys, it would be 192.168.1.1. Click Go. You will see a User Name and Password prompt - for Linksys, you leave the name blank and type in: admin for the password. You will then see a setup page where you can click to disable the DHCP server. Your own router documentation will list the appropriate logon credentials.
You will then need to go back to the setup page and change the LAN IP address to one that will work with the other router’s subnet. For example, if the other router’s LAN address is 192.168.15.1, then you can use 192.168.15.254. Power off both routers. Use the cable to connect to one of the ports in the first router and power back up again and you should be in business.
Hopefully, this will help you with your setup. If you need any more information, don’t hesitate to ask.
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