How to use a router as a Wi-Fi signal booster for another router

Every owner of an apartment with thick walls is familiar with the situation of losing Wi-Fi in a distant room or on the balcony. The main router's signal weakens as it passes through obstacles, and devices begin to lose connection. Users often buy expensive mesh systems or new, powerful models, forgetting that an old, dusty router can be an excellent solution.

Turning the second router into signal amplifier A repeater is a cost-effective way to extend the coverage of your wireless network. You don't need to run long cables across your entire apartment or purchase specialized equipment. Simply configure the two devices correctly so they operate in a single namespace.

In this article, we will look at the technical nuances of setting up operating modes, such as WDS, Client Bridge or RepeaterYou'll learn how to avoid IP address conflicts and set up seamless roaming between access points using standard firmware features of popular router brands.

Operating principle and selection of equipment

Before setting up, you need to understand how the connection will work. The primary router distributes the internet, and the secondary device receives this signal and retransmits it further. Depending on the firmware, the second router can operate in "Wi-Fi mode." WDS bridge, transmitting data via Wi-Fi, or act as a wired access point if a cable is laid between them.

To implement this scheme, you will need the router-amplifier itself. It is important that it supports one of the repeater modes. Modern models from TP-Link, Asus, Keenetic And MikroTik have such features in the basic settings. Older models may require the installation of alternative firmware such as OpenWrt or DD-WRT.

Standard compatibility is key. If the main router only operates at 2.4 GHz, the extender must also support this frequency. For maximum speed, it's best to use dual-band devices that support this standard. 802.11ac or newer.

⚠️ Warning: Using WDS mode can reduce overall network throughput by up to 50%, since the radio channel is used for both receiving and transmitting data simultaneously.

Preparing for setup: reset and addressing

You should always begin setup by completely resetting the secondary router to factory settings. This will prevent any configuration conflicts left over from previous use. Locate the hole on the back of the device. Reset, press it with a paper clip and hold for 10-15 seconds until the indicators blink.

The next critical step is changing the IP address of the LAN interface. If the main router has an address 192.168.0.1, then the amplifier needs to be assigned an address from the same subnet, but unique, for example, 192.168.0.2This will allow you to easily access the settings of both devices in the future.

You also need to turn off the server DHCP On the secondary router. Only the primary router should distribute IP addresses to connected clients. If DHCP remains enabled on both devices, address conflicts will occur on the network, and the internet will stop working.

What to do if the addresses match?

If you accidentally assign the same IP addresses to the main and secondary routers, your network will crash. You'll have to disconnect the secondary router from the network, reset it using the Reset button, and reconnect directly to it from your computer to change the address.

Setting up bridge mode (WDS) using TP-Link as an example

Let's look at a classic scenario for setting up a wireless bridge. Go to the web interface of the secondary router. In the wireless network menu (Wireless) find the option WDS Bridging and activate it. Once enabled, a "Search" or "Survey" button will appear to scan for available networks.

Select your primary network from the list and enter its password. It is important that the channel (Channel) and the protection type match on both devices. For stable operation, it is recommended to manually set a fixed channel (e.g., 1, 6, or 11) rather than leaving it in "Auto" mode.

After saving the settings, the router will reboot. If everything is correct, the Wi-Fi or WDS indicator on the device's panel should light up or change behavior. The device is now broadcasting your primary network's signal, extending its range.

Setting up Asus and Keenetic routers

Devices from Asus And Keenetic have more advanced software, which often hides complex terms like WDS behind easy-to-understand wizard settings. In routers Asus you should go to the section Administration -> Opening hours and select "Repeater mode".

The system will automatically search for networks. All you have to do is select the one you need and enter the security key. The advantage of such routers is their support for AiMesh (for compatible models), which allows you to create a single Mesh system from different Asus routers, providing better roaming than classic WDS.

In the ecosystem Keenetic The process is even more automated. If you have a router that supports Mesh, just press a button. Wi-Fi (or RF) on the primary device, and then on the secondary one. They will automatically find each other and sync security settings and network names.

However, if you're setting up a third-party router with Keenetic, you'll need the "Access Point" or "Repeater" mode. In this case, the Keenetic can act as either a master or slave device, receiving and releasing the Wi-Fi signal.

⚠️ Note: When using repeater mode on different brands (for example, TP-Link picks up Asus), seamless roaming will not work. Devices will "cling" to the weak signal until the last possible moment before switching.

Wired connection: Access point mode

If a cable (twisted pair) can be laid between the rooms, the efficiency of the circuit increases manifold. In this case, the second router operates in the Access PointsThe signal is transmitted via cable without any loss of speed, and the Wi-Fi module only distributes it to clients.

In this case, setup is simpler: connect the LAN port of the main router to the LAN port of the secondary router (you don't need to use WAN mode unless the secondary router has an explicit switch to "Access Point" mode, which reassigns ports). DHCP on the second device should also be disabled.

This configuration provides maximum stability and speed, comparable to a direct connection to the main router. It's ideal for setting up a workstation in a remote room or connecting a 4K Smart TV.

Typical problems and solutions

Despite the apparent simplicity, users often encounter a number of issues. The most common is that the device connects to the extender, but there is no internet connection. This most often indicates an incorrectly configured gateway or DNS. Make sure the client's TCP/IP settings are set to "Obtain automatically," and the main router has updated DNS (you can use Google's public DNS). 8.8.8.8).

Another problem is low speed. As mentioned earlier, wireless amplification reduces speed. Furthermore, if you place the extender too far from the source (where the signal is already weak), it will transmit a weak signal. The extender should be placed within range of the main router's strong signal.

Connection interruptions are also possible due to channel mismatches. If your neighbors have a powerful router on the same channel, interference will be inevitable. Use Wi-Fi analysis apps (e.g., WiFi Analyzer on Android) to find a free channel and manually register it in the settings of both devices.

⚠️ Note: Firmware interfaces are constantly being updated. The menu item layout may differ from what's described. Look for sections labeled "Wireless," "Bridge," "Repeater," or "Bridge."

Network optimization and security

After successful setup, don't forget about security. Make sure encryption is enabled on both devices. WPA2-PSK (AES). Using outdated WEP or an open network will make your internet accessible to neighbors and hackers who can use your connection for illegal activities.

To improve stability, we recommend updating the secondary router's firmware to the latest version available on the manufacturer's website. This will fix known bugs and improve compatibility with new devices.

If you use different network names for different rooms, this can be even more convenient for control. For example, Home_Living And Home_BedroomThis will allow you to manually select which access point to connect to, avoiding the smartphone's automatic, but not always optimal, switching.

Is it possible to connect three routers in a chain?

Technically possible, but highly discouraged. Each Wi-Fi signal retransmission reduces speed and increases latency (ping). For larger areas, it's better to use a wired backbone or mesh systems.

Do I need to disable DHCP on the second router?

Yes, it is required. There should only be one active DHCP server on the network (on the main router). If DHCP is enabled on the second router, it will begin issuing its own IP addresses, which will cause conflicts and prevent internet access for connected devices.

Will my internet speed drop when using my router as a booster?

With a wireless connection (repeater/WDS mode), the speed will inevitably drop, often to 50% of the original, since the radio module operates in half-duplex mode. With a wired connection (access point mode), the speed loss will be minimal and imperceptible to the naked eye.

Is it possible to connect routers from different manufacturers?

Yes, the WDS standard is universal, but different manufacturers may implement it differently. Connecting routers from different brands (for example, TP-Link and Asus) in bridge mode is possible, but requires manually configuring the same parameters: channel, encryption type, and network name. Mesh features from different vendors do not work together.

How do I find the IP address of the second router after setup?

After setting up and connecting to the shared network, the second router's IP address will be the one you manually assigned (e.g., 192.168.0.2). If you've forgotten the address, you can view the DHCP Client List in the main router's interface—it will display the device with the corresponding MAC address.