How To Use Two Routers on One Internet Modem Connection

Using two routers on one internet modem connection can provide several benefits, such as extending your Wi-Fi coverage, isolating certain devices on separate networks, and improving overall performance. While it may seem complicated to set up at first, it is actually quite straightforward once you understand the basic configuration.

Reasons to Use Two Routers

Here are some of the main reasons you may want to use two routers on one modem:

  • Extend Wi-Fi Coverage: Adding a second router can help reach Wi-Fi dead zones in parts of your home or office. The two routers work in tandem to provide wider Wi-Fi access.
  • Isolate Bandwidth-Intensive Devices: You can connect devices like gaming PCs or streaming boxes to one router and other less demanding devices to the second router. This prevents one device from hogging all the bandwidth.
  • Separate Guest Network: Create a separate Wi-Fi network with the second router specifically for guests. This keeps your main network more secure.
  • Wired and Wireless Networks: Use one router for wired connections and the other for wireless devices throughout your home or office.
  • Load Balancing: Two routers can share the network load more efficiently, improving speeds for connected devices.

Equipment Needed

To set up two routers on one modem, you will need:

  • High-speed modem provided by your Internet Service Provider (ISP)
  • Two routers (Wi-Fi or wired)
  • Ethernet cables
  • Computer or mobile device for setup

Your main router will connect directly to the modem. This is known as the primary router. The second router connects to the primary router and is used to extend the network.

Step-by-Step Setup

Follow these steps to properly configure two routers on a single internet modem:

1. Reset Routers to Factory Default Settings

Start by resetting both routers to clear out any previous settings. Refer to your router manuals for the reset procedure. Usually, it involves pressing and holding a small reset button on the back of the router for 10-15 seconds.

2. Connect Primary Router

Connect your main router to your ISP modem using an Ethernet cable. This is your primary router that will manage the main network and internet connection.

Connect to this router wirelessly from your computer or mobile device to begin setup. Configure it just as you normally would by entering your ISP connection details.

3. Disable DHCP on Secondary Router

The secondary router will connect to the primary router to extend your home network.

Important: You must disable DHCP server functionality on this router so that only the primary router assigns IP addresses. Having two DHCP servers causes conflicts.

Refer to your secondary router documentation on how to disable DHCP. This setting is normally under the LAN or Network tab.

4. Connect Routers Via Ethernet

Run an Ethernet cable from one of the LAN ports on the primary router to the WAN or Internet port of the secondary router. This connects the two routers together.

Alternatively, you can connect an Ethernet cable between any standard LAN ports on both routers rather than using the WAN port on the secondary router.

5. Configure Secondary Router LAN IP Address

The secondary router needs an IP address in the same subnet as your primary router to communicate on the LAN.

For home networks, the most common IP scheme is 192.168.1.x. So if your primary router IP is, assign your secondary router something like IP address

Again, refer to your router documentation on how to change the local IP address.

6. Connect Devices

You can now connect wired devices to the ports on both routers to expand your network.

The secondary router also broadcasts a separate Wi-Fi network to extend your wireless coverage. Connect to this Wi-Fi network the same way you would with any access point to connect your wireless devices.

7. Fine Tune Connection

You may need to adjust a few settings once everything is connected to get the two routers working seamlessly together. Some tweaks include:

  • Set both wireless networks to different channels to reduce interference.
  • Configure the DHCP address pool on the second router to a smaller range of IP addresses.
  • Enable wireless bridging if connecting wirelessly instead of via Ethernet cable.

And that covers the basics of connecting two routers to one modem! With this setup, you can extend your network reach, add more wired devices, isolate certain computers and devices, and potentially improve Wi-Fi and wired performance.

Alternative Options

While using two routers is one good option, there are some alternative ways to improve your home network including:

Wi-Fi Extenders – Cheaper and easier to set up than a second router. Extends Wi-Fi only without extra Ethernet ports.

Wi-Fi Mesh Systems – Complete kits that provide full home Wi-Fi with two or more mesh access points. More consumer friendly option.

DD-WRT Firmware – Open source router firmware that adds advanced functionality like repeater bridge mode and VLAN tagging. Useful for older routers.

Ethernet Switches – Add more wired ports without the routing functionality of a second router. Simple plug-and-play installation.

So explore all options to find the best one to suit your home network needs!