Yes, you can connect two routers to one modem, and it's a common setup
Two routers can share a single modem without damage to either device. The modem receives the internet signal from your provider and passes it to the first router, which then passes it to the second router. This works because routers are designed to accept internet from an upstream source and distribute it downstream — the second router straightforward treats the first router as its upstream source instead of the modem.
The main reason people do this is to extend WiFi coverage to a part of the house the first router doesn't reach well, or to create a separate network for guests or work devices. You can also use two routers to split your devices between networks, which can improve performance if one network is getting congested.
Key Takeaways
- Connect the first router to the modem with an ethernet cable, then connect the second router to the first router with another ethernet cable — never connect them to the same modem port.
- The second router must be set to bridge mode or access point mode so it doesn't try to manage the network; leaving it in router mode creates conflicts and slows everything down.
- Both routers can broadcast the same WiFi name and password, or you can give them different names so devices connect to whichever is closest.
- The second router's performance depends on the ethernet cable between routers — a poor connection there will slow down all devices on the second router.
How to physically connect the routers
Use an ethernet cable to connect one of the LAN ports (not the WAN or internet port) on the first router to the WAN port on the second router. The WAN port is usually labeled differently or colored differently from the other ports — check your router's manual if you're unsure which one it is.
The modem connects to the first router's WAN port with its own ethernet cable. Power on the modem first, wait for it to fully boot (usually 2 to 3 minutes), then power on the first router, then the second router. This order matters because each device needs to establish its connection before the next one starts.
Do not plug both routers into the same modem port or use a splitter to run two cables from the modem to two different routers. The modem is designed to serve one device at a time, and splitting the connection will cause both routers to malfunction.
Setting the second router to bridge or access point mode
After the cables are in place, log into the second router's settings. Open a web browser on a device connected to that router and type the router's IP address (usually 192.168.1.1 or 192.168.0.1 — check the sticker on the back of the router). Enter the admin username and password, which are often "admin" and "admin" or "admin" and the router's serial number.
Look for a setting called bridge mode, access point mode, or repeater mode. The exact name varies by brand. Bridge mode and access point mode are the best choices because they turn the second router into a straightforward WiFi broadcaster that doesn't try to manage the network. Repeater mode works but is slower because the router has to receive and transmit on the same frequency at the same time.
If you cannot find these options in the settings menu, check the router's manual or the manufacturer's website for your specific model. Some routers have a physical switch on the back that changes modes. After you change the setting, the router will restart, and you should wait 2 to 3 minutes before testing the connection.
Choosing WiFi names and passwords
You have two main options. You can give both routers the same WiFi name (SSID) and password, which makes devices automatically connect to whichever router has the strongest signal as you move around the house. This is seamless for the user but requires both routers to be set to the same channel — usually channel 1, 6, or 11 for 2.4 GHz networks — to avoid interference.
Alternatively, you can give each router a different WiFi name, like "Home-Main" and "Home-Extended". This lets you see which network you're on and manually choose which router to connect to. It's useful if you want to keep certain devices on the second router or if you're troubleshooting a problem and need to know which router is causing it.
To change the WiFi name and password, log into the second router's settings the same way you did to change the mode. Look for wireless settings, WiFi settings, or SSID. Change the name and password to whatever you want, then save and restart the router.
The ethernet cable between routers matters more than you might think
The speed and reliability of the connection between the two routers directly affects how fast the second router can send and receive data. If you use an old, damaged, or very long ethernet cable, the second router will be slow even if your internet speed is fast. The cable should be in good condition and no longer than 100 meters, though in a home it's almost always much shorter.
If possible, run the cable through walls or along baseboards rather than leaving it exposed. If you must run it a long distance, use a Cat6 or Cat6a cable instead of Cat5e — the thicker shielding helps prevent signal loss over longer runs. Test the connection by running a speed test on a device connected to the second router; if the speed is much lower than what you get on the first router, the cable is likely the problem.
Troubleshooting common problems
If devices connected to the second router cannot reach the internet, the most common cause is that the second router is still in router mode instead of bridge or access point mode. Log back into its settings and confirm the mode is set correctly. The second most common cause is that the ethernet cable between the routers is loose or damaged — unplug it, inspect both ends, and plug it back in firmly.
If the WiFi signal from the second router is weak, move it to a more central location in the area you want to cover, away from metal objects and thick walls. If devices keep dropping the connection to the second router, the channel it's broadcasting on may be interfering with the first router's channel. Change the second router to a different channel (try 1, 6, or 11 for 2.4 GHz) and see if the problem improves.
If you're getting very slow speeds on the second router, the ethernet cable between routers is the likely culprit. Test with a different cable if you have one available. If the speed improves, replace the original cable.
When to use a mesh system instead
If you find yourself frustrated with managing two separate routers, a mesh WiFi system might be a better choice for your next upgrade. Mesh systems are designed to work together from the start and handle mode switching and channel management automatically. They're more expensive upfront but require much less configuration and troubleshooting.
However, if you already own two routers and want to use them, the setup described here will work. It's also a good way to test whether extending your WiFi coverage will solve your problem before you invest in new equipment.
Frequently Asked Questions
Can I connect the second router wirelessly instead of with an ethernet cable?
Yes, but it will be slower. The second router can receive the first router's WiFi signal and rebroadcast it, but this cuts the available bandwidth roughly in half because the router is using the same frequency to receive and transmit. An ethernet cable between routers is always faster and more reliable if you can run one.
Will having two routers slow down my internet?
Not significantly if they're connected by ethernet cable and the second router is in bridge mode. The modem's speed is the limiting factor, not the routers. If you connect them wirelessly, yes, you will see a noticeable slowdown on the second router.
Do both routers need to be the same brand?
No. Any router can connect to any other router as long as you have an ethernet cable and can access the second router's settings to change its mode. Different brands work together without problems.
What if my modem only has one ethernet port?
You cannot connect two routers to a modem with only one port. You would need to use a network switch — a small device with multiple ethernet ports — between the modem and the first router, then connect both routers to the switch. However, this adds another device to manage and is less common in home setups.
Can I use the second router as a wired connection for a desktop computer?
Yes. Plug an ethernet cable from one of the LAN ports on the second router into your computer. The computer will have a wired connection to the network, which is faster and more stable than WiFi.