Many home internet users are familiar with the situation where the Wi-Fi signal from the main router can't penetrate thick walls or reach distant rooms. Instead of purchasing expensive mesh systems or complex repeaters, it's often possible to use an old, but working router lying around in the closet. This is a cost-effective and efficient solution that allows you to significantly expand your wireless network's coverage without the expense of new equipment.
However, simply connecting two devices with a cable isn't enough—for the entire system to function properly, network addresses and operating modes must be configured correctly. Incorrect configuration can lead to IP address conflicts, which can result in the internet stopping completely on all connected devices. In this article, we'll detail the process of turning a second router into an access point or switch, so you can enjoy a stable signal throughout your home.
Before setting up, you need to decide on a connection scheme, as this will determine your actions. There are two main methods: connecting via a WAN port (repeater/router mode) and connecting via LAN ports (access point mode). The latter option is considered more stable and preferable for creating a unified local network where all devices can "see" each other, for example, for transferring files to a printer or media server.
Selecting equipment and preparing for work
To implement the plan you will need yourself second router, which will act as a booster. It doesn't have to be the same model as your main router, but it should ideally support Wi-Fi standards at least as good as your main router, otherwise the speed in the extended area will be limited by the old device's capabilities. You'll also need an Ethernet cable (twisted pair), preferably pre-terminated, long enough to run between rooms.
It's important to check the technical condition of the second device. If it hasn't been used for a long time, it might be a good idea to reset it to factory settings. Most models have a recessed button on the back panel for this purpose. Reset or RestorePress it with a paperclip and hold it for about 10-15 seconds until the lights flash simultaneously. This ensures that there are no old passwords or provider settings left in the configuration that could interfere.
⚠️ Important: Before starting any work, unplug the second router from the power source and disconnect it from the main router. Configuration should be performed in isolated mode to avoid address conflicts on your home network.
Prepare a computer or laptop for setup. It's easiest to use a device with a network port, but you can also connect via Wi-Fi to the second router's open network (if one was added after the reset). Make sure your computer's network card is set to obtain an IP address automatically so the device can connect to the router by default.
Connection diagram: LAN-LAN or LAN-WAN
There are two fundamentally different approaches to physically connecting devices, and the choice between them determines the logic of subsequent software configuration. The first method, often referred to as "Access Point mode," involves connecting via the LAN ports of both devices. In this case, the second router ceases to function as a router (distributing IP addresses) and simply becomes a cable extender with Wi-Fi capabilities.
The second method uses the WAN (Internet) port on the second device. This creates a network cascade: Router A distributes addresses to devices on its subnet, while Router B creates its own subnet within the first. This can be useful if you want to isolate a guest network or smart home devices, but for the average user, this method introduces unnecessary complications with port forwarding and device visibility between rooms.
We will consider the most universal and stable option - access point mode (LAN-LAN)It creates a unified network where a printer located near the main router is visible to a laptop connected to the second router's Wi-Fi. This setup minimizes data loss, and ping remains low, which is critical for online gaming and video calls.
Why shouldn't you use WDS (Bridge) mode?
WDS mode allows you to connect routers wirelessly, without cables. However, this mode significantly reduces speed (often by 50% or more), requires support from both devices, and is often unstable. A wired connection is always more reliable and faster.
Configuring the IP address of the second router
The first step in software configuration is to change the IP address of the second router. By default, most devices have an address 192.168.0.1 or 192.168.1.1If the main router has the same address, a conflict will occur and the network will stop working. We need to assign a unique value that's in the same subnet as the main device.
Connect your computer to the second router (either via a cable to any LAN port or via Wi-Fi). Open a browser and enter the address printed on the sticker on the bottom of the device. Log in to the control panel using the default login and password (often admin/admin). Find the section responsible for local network settings. It may be called LAN, Network or Local area network.
Change the IP address to a free one. For example, if the main router has the address 192.168.1.1, ask the second one 192.168.1.254 or 192.168.1.2The main thing is that the last digit is different from the main router's address and not within the range of addresses the main router distributes automatically (DHCP pool). After saving the settings, the router will prompt you to reboot, and you will now be able to access its control panel using the new address.
- 🌐 Main router: IP 192.168.1.1 (distributes addresses from .100 to .200)
- 🌐 Second router: IP 192.168.1.2 (static management address)
- 🌐 Computer: receives an address automatically from the main router
Disabling the DHCP server
This is a critical step, without which the network won't function. In standard mode, each router attempts to be the "master" and distribute IP addresses to connecting devices. If there are two active DHCP servers on the same physical network, chaos ensues: your phone might receive an address from one router, but the default gateway might be assigned by the other, resulting in no internet connection.
In the settings of the second router, find the section DHCP Server or DHCP server. It is usually located in the same menu where you changed the IP address, or in the section Network SettingsYou need to switch the server status to Disable (Disable) or OffAfter this, the second router will stop distributing addresses and will simply forward all requests to the main router.
After disabling the DHCP server and saving the settings, the computer connected to the second router may lose connection. This is normal, as it no longer receives an IP address automatically. To continue setup (if still needed) or test functionality, you may need to temporarily assign a static IP address to the PC's network card or reboot the router and reconnect if you're configuring it on the shared network.
⚠️ Warning: If you forget to disable DHCP on the second router, your entire home network may crash. Devices will constantly reconnect, lose their gateway, or receive incorrect DNS addresses. Checking this is essential!
☑️ Second Router Setup Checklist
Setting up a wireless Wi-Fi network
Now let's move on to setting up the radio network itself. You can name the network (SSID) on the second router exactly the same as on the first, and set an identical password. This way, your devices (smartphones, laptops) will perceive it as a single network and automatically switch between routers depending on signal strength. However, the standard Wi-Fi protocol doesn't guarantee instant, seamless roaming, so in some cases, a device may cling to a distant router until the last possible moment.
An alternative is to give the networks different names, for example, Home_Wifi And Home_Wifi_ExtThis allows you to manually control the connection: if you're in the kitchen, you're connected to the primary connection, but if you're in the garage, you switch to the extended connection. For many users, this approach is more predictable, as they know exactly which access point they're currently connected to.
Selecting the right channel and channel width is important, especially if you live in an apartment building. Use Wi-Fi analyzer apps on your smartphone to find a clear channel. For the 2.4 GHz band, channels 1, 6, or 11 are optimal, as they don't overlap. For 5 GHz, there's a wider range of options, but the signal has poorer penetration through walls.
Physical connection and operation check
Once all the settings are complete (changing IP, disabling DHCP, configuring Wi-Fi), you can proceed to the final stage. Take the prepared Ethernet cable. Plug one end into any available space. LAN port main router. Connect the other end to any free LAN port second router. Important: the WAN (Internet) port on the second router in this diagram remains free!
After connecting with a cable, wait about 1-2 minutes. The LEDs on both routers should light up in the appropriate color (usually green or blue), indicating a link is established. Now connect your laptop or phone to the second router's Wi-Fi network (or its LAN port) and try accessing the internet.
To check, open the command prompt (on Windows: Win+R, enter cmd) and enter the command ping 8.8.8.8 -tIf packets are transmitted without loss (time < 50ms) and there are no "Timeout exceeded" messages, the network is functioning correctly. Also, check whether devices connected to different routers can see each other (for example, via Network Places or shared folders).
| Parameter | Main router | Second router (AP mode) |
|---|---|---|
| IP address | 192.168.1.1 | 192.168.1.2 (static) |
| DHCP Server | Enabled | Disabled |
| Connecting the cable | Any LAN port | Any LAN port (WAN free) |
| Function | IP Distribution, Routing, Wi-Fi | Wi-Fi and switching only |
⚠️ Note: Settings interfaces may vary depending on the router model (TP-Link, Asus, Keenetic, D-Link). Menu item names may vary, but the logic (IP, DHCP, LAN) remains the same across all manufacturers. Always consult the official documentation for your device.
What should I do if I can't access the second router's control panel after setup?
If you changed the IP address of the second router, but your computer is still set to "Obtain an IP automatically" from the old DHCP server, you won't be able to access the menu. Solution: temporarily assign a static IP address from the same subnet (e.g., 192.168.1.50) to your PC's network card, access the settings, and then reset the IP address to "Obtain an IP automatically."
Possible problems and their solutions
Despite the simplicity of the setup, users may encounter a number of common issues. The most common is a lack of internet access on devices connected to the second router, even though the LEDs are lit. This typically means that the DHCP server on the second device hasn't been fully disabled, or the primary router isn't issuing addresses due to a full pool (if there are too many devices connected).
Another issue is low speed. If you're using an older cable (Category 3 or 5, not 5e), your speed may be limited to 100 Mbps even with a gigabit plan. Also, make sure the second router isn't installed in a metal cabinet or behind a mirror, which would block the signal. Antenna placement is also important: they should be pointed vertically upward.
If devices can't see each other on the local network (for example, printing isn't working), check the firewall settings on the second router. In access point mode, it should be set to minimally aggressive or disabled for the LAN interface. Sometimes, rebooting the entire chain helps: first turn off both routers, then turn on the primary router, wait for it to boot up, and only then turn on the second one.
Is it possible to connect routers without a cable, via Wi-Fi?
Yes, this is called repeater mode, or WDS. However, the speed in this mode drops by at least half, since the radio module is both receiving and transmitting. The stability of this connection is also lower than with a cable. Use this method only if installing a cable is physically impossible.
Do I need a second router of the same brand as the first one?
No, it's not necessary. TCP/IP and Ethernet protocols are universal. You can connect an ASUS router to a TP-Link or Xiaomi router. The main thing is to configure the IP addresses correctly and disable DHCP on the second device, regardless of brand.
Why did the internet on the main router disappear after connecting the second router?
Most likely, there's an IP address conflict. Make sure the second router's IP address is different from the first one, but is in the same subnet. Also, check that the DHCP server is indeed disabled on the second device.