Setting Up a Router as a Wi-Fi Repeater via Cable: A Complete Guide

The problem of "dead zones" in an apartment is familiar to many home internet users. The signal from the main router often doesn't reach distant rooms or the kitchen due to thick walls, metal structures, or the distance. The solution is to install a second router, which will receive the signal via cable and distribute it further, ensuring a stable connection throughout the home.

Unlike wireless repeaters, using twisted pair cable to connect devices ensures maximum speed and no delays. Cable connection Eliminates interference and allows for the transmission of large amounts of data without quality degradation. This is especially important for 4K video streaming, online gaming, and video conferencing, where every millisecond counts.

In this article, we'll walk you through the step-by-step process of converting an old or spare router into a fully-functional access point. You'll learn how to properly physically connect the devices and what IP address settings need to be changed to ensure the network functions seamlessly. Technical literacy It is not required here, just follow the instructions carefully.

Selecting equipment and preparing cables

Before you begin setup, make sure you have two working routers. The first, primary router, is already configured and is distributing internet. The second router will act as an access point. It's important to understand that to function as a wired repeater, the second router must support the wireless mode. Access Point or just have the standard router functions that we will reconfigure.

To connect the devices, you will need a piece of network cable. Ethernet (twisted pair). The cable length depends on the distance between rooms, but for home use, 10–20 meters is usually sufficient. The cable must be terminated at both ends according to the standard. T568B, where the colors of the wires are arranged in a certain sequence.

⚠️ Warning: Do not use older Cat3 or lower cables. For stable operation at modern speeds, a Cat3 cable is required. Cat5e or Cat6, supporting gigabit speeds.

You'll also need a computer or laptop for the initial setup of the second router. Connect it to the LAN port of the device you're configuring using a short patch cord. Make sure the computer is set to obtain an IP address automatically so the device can "see" the router.

Physical connection of devices

The connection scheme depends on whether you're in the setup phase or have already completed the configuration. During the setup phase, the second router should be located near the computer and should not be connected to the primary router. This will prevent IP address conflict, since both devices may have the same default gateway address.

Connect your computer to any LAN-port of the second router. After powering on, wait for the device's operating system to load. The indicators on the front panel should indicate connection activity. Only after all software settings are completed will we connect the routers.

The final connection looks like this: the cable from the main router (from any LAN port) is inserted into WAN port (or LAN, if the special bridge mode is selected) of the second router. This will create a backbone for internet access to the other part of the house.

• 🔌 Check the integrity of the cable before installing it in walls or baseboards.
• 💻 Use a laptop for mobility when checking the signal in different locations.
• 🔋 Make sure that the power supplies of both routers are working properly and have the correct voltage.

Changing the IP address of the second router

The first thing you need to do in the second router's web interface is change its IP address. 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.

Go to settings LAN (Local Area Network). Find the IP Address field. If the address is the main router's 192.168.1.1, then the second device needs to be assigned an address 192.168.1.2 Or any other router on the same subnet that isn't occupied by other devices. This will allow you to access the second router's settings using its unique address in the future.

After changing the address, the router will ask you to reboot. Your computer will lose connection to it, and you will have to enter the new IP address in the browser's address bar to continue working. This is a standard procedure required to establish a proper connection. network topology.

⚠️ Important: Write down the new IP address of the second router on paper or in a note. Without this address, you will not be able to change the Wi-Fi settings or password in the future.

Setting up a DHCP server

A critical step is disabling the DHCP server on the second router. Any local network should only have one router distributing addresses. This function is performed by the primary router. If the second router also starts distributing IP addresses, your devices (phones, laptops) will become confused and will not be able to connect to the internet.

Find the section in the menu DHCP Server or "Local Area Network". Set the switch to the position Off or "Disable." Save the settings. Now the second router will simply forward address requests to the main device, acting as a transparent bridge.

After disabling DHCP, the computer connected to the second router may lose internet access. This is normal. You'll need to reset your computer's network card settings to "Obtain an IP address automatically" if they were changed manually, and reconnect.

Why can't you leave two DHCP servers?

If there are two active DHCP servers on the network, devices will receive IP addresses randomly from either one. This often results in a device receiving an address from the second router, but the default gateway remains from the first (or vice versa), resulting in internet connection loss despite a Wi-Fi connection.

Wi-Fi wireless network configuration

Now let's configure the radio module. You can create a new network with a unique name or clone the main router's settings to create seamless roaming (although this won't provide full mesh roaming, switching will be faster). It's recommended to set a different network name (SSID) and password than your main network so you can clearly see which access point you're connected to.

In the section Wireless or "Wireless Network" to set the network name. For maximum compatibility, select Mixed mode. 802.11 b/g/n/acIf your router is dual-band, configure the 2.4 GHz and 5 GHz networks separately. It's best to leave the channel set to "Auto" so the router chooses the one with the least noise.

Be sure to set a strong encryption type. Use WPA2-PSK or WPA3, if your devices support it. The password should be complex and contain letters and numbers. Weak security will allow neighbors to use your channel, reducing speed.

• 📡 Use channels 1, 6 or 11 for the 2.4 GHz band to avoid interference.
• 🔒 WPA3 provides better security, but older devices may not connect.
• 📶 Place antennas vertically for better horizontal coverage.

Completing setup and testing

After saving all the settings, you need to reboot the second router. Now you can connect it to the main one. Take a long cable and connect one end to LAN port of the main router, and the second one is in WAN The second port (unless the operating mode has been manually changed to Access Point; in some TP-Link or ASUS models, this is done in the interface). If the "Access Point" mode is selected programmatically, the cable can be connected to any port, but WAN is more reliable.

Check your network. Connect your smartphone to the new Wi-Fi network. If you have internet access and pages load, the setup was successful. Walk around your apartment with your phone, checking the signal strength. Areas where Edge or 3G was previously available should now have stable service. 4G/LTE or full Wi-Fi.

If you still don't have internet, check the cable. It may be damaged or poorly connected. Also, make sure there are no IP address conflicts. In rare cases, resetting the second router with the button may help. Reset and repeating the procedure from the very beginning.

⚠️ Note: Router interfaces from different manufacturers (Asus, TP-Link, D-Link, Keenetic) may look different, but the logic (IP -> DHCP -> Wi-Fi) remains the same. If you can't find the required option, consult the official documentation for your model.

Frequently Asked Questions (FAQ)

Is it possible to connect routers via a WAN port without changing the mode?

Yes, this is possible, but then you'll have two different subnets (double NAT). Devices connected to the second router will "see" the internet, but they may not see printers or TVs connected to the first router. For home use, it's better to use access point (AP) mode.

Which cable is best to use for a distance of 30 meters?

For distances up to 50-70 meters, a standard cable is ideal. Cat5e with copper conductors (not copper-clad aluminum, CCA). Over long distances, the signal may attenuate, requiring active equipment.

Will the internet speed decrease on the second router?

With a wired connection, speed losses are minimal and unnoticeable in everyday use. The only limitation may be the router's port speed (for example, if the FastEthernet ports are 100 Mbps, but the data plan is 500 Mbps).

Do I need to configure a second router if it has a WPS button?

The WPS button is typically used for wireless pairing. For a wired connection via cable, configuration via the web interface is required, as it requires changing the IP address and disabling DHCP, which cannot be done via WPS.