How to connect two routers together

Many users are familiar with the situation where the signal from their main wireless router isn't strong enough to cover the entire house or apartment. Concrete walls, a complex layout, or simply a long distance from the device create "dead zones" where internet service is either intermittent or completely absent. Connecting a second router The first is that this is the most effective and cost-effective solution to the problem, allowing you to expand your coverage area without purchasing expensive mesh systems.

In this article, we'll take a detailed look at how to connect two devices into a single network, what cables are needed, and the differences between the various connection methods. You'll learn the intricacies of setting up IP addresses to avoid equipment conflicts and understand which method—wired or wireless—is best suited for your specific operating conditions.

⚠️ Warning: Before making any changes to your network equipment, be sure to save your current configuration files if they contain provider-specific settings that you don't remember by heart.

Selecting a connection method: cable or Wi-Fi

Before getting down to the technical details, you need to decide on a connection method. There are two main options: a twisted pair (cable) connection and a wireless connection. Cable connection (LAN-LAN or LAN-WAN) ensures maximum stability and data transfer speed, which is critical for online gaming or watching 4K video.

A wireless connection (bridge mode or WDS) allows you to place a second router in locations where running cable is impossible or undesirable for aesthetic reasons. However, it's important to note that when using a Wi-Fi bridge, the actual speed on the second device may drop by up to 50% of the original due to the specifics of the radio channel.

• 📡 Wired method: Provides maximum speed, no lag and stability, but requires cables to be run between devices.
• 📶 Wireless method: does not require additional wires, but depends on the signal quality and may reduce the overall network throughput.
• 🔌 Hybrid option: The use of PowerLine adapters that transmit the Internet through electrical wiring is a compromise solution.

The choice of method directly depends on the architecture of your home. If it's possible to run a cable through or use existing wiring, that's always preferable. Otherwise, you'll have to rely on radio, carefully choosing the location of the second device.

Preparing equipment and resetting settings

Before connecting devices, they must be properly prepared. Most often, the second router (which will be extending the network) already has some settings from previous use or from the factory. To avoid IP address conflicts and unpredictable network behavior, reset settings to factory settings is a mandatory step.

To perform a reset, locate the button on the back of the device. Reset or RestoreIt may be recessed into the case, so you'll need a thin object, such as a paperclip or toothpick. Press and hold the button on the powered-on router for 10-15 seconds until the lights flash simultaneously, signaling the start of the recovery process.

After the reset, connect your computer to one of the LAN ports of the second router. You will need to log into its web interface, usually accessible at 192.168.0.1 or 192.168.1.1The login and password are often found on a sticker on the bottom of the device. Make sure your computer is configured to obtain an IP address automatically.

LAN-WAN connection diagram (Cascade)

The most common and easiest to implement method is a "cascade" connection, where the WAN port of a second router is connected to the LAN port of the first. In this setup, the first router assigns IP addresses (acting as a DHCP server), while the second router acts as a client, receiving the address from the "master" device and broadcasting the internet connection.

To implement this scheme, connect the Ethernet cable to the port LAN main router and port WAN (or Internet) the second one. After physically connecting, access the second router's settings. Find the "WAN" or "Internet" section and select the "Dynamic IP" connection type. In this mode, the device will automatically request an address from the main router.

An important nuance is the subnet conflict. If both routers have the same local IP by default (for example, 192.168.0.1), the network won't work. You need to change the LAN IP address of the second router to an address from the same subnet, but with a different ending, for example, 192.168.0.254After changing the address, the device will reboot, and it will need to be accessed using the new IP address.

LAN-to-LAN connection diagram (Access Point Mode)

A more advanced method that allows you to create a single seamless network with a common name (SSID) and password requires setting the second router to the mode Access points (Access Point). In this case, a cable is connected from the LAN port of the first router to the LAN port of the second. The WAN port on the second device remains free.

The key here is to disable the DHCP server on the second router. Since there can only be one address-distributing server on the network (on the main router), enabling this feature on the second device will cause chaos: devices will receive incorrect addresses and lose internet access. Find "DHCP Server" in the menu and select "Disable" or "Off."

⚠️ Important: After disabling the DHCP server on the second router, you will lose access to its settings via the regular address unless your computer has a static IP address. Be sure to write down the second router's new IP address before disabling DHCP.

To create a seamless roaming experience (although only mesh systems support full roaming), it's recommended to set the network name (SSID) and password on the second router to the same value as the first. It's best to use different, non-overlapping Wi-Fi channels (e.g., 1, 6, and 11 for the 2.4 GHz band) to prevent devices from jamming each other.

Why is LAN-LAN better for a smart home?

In LAN-to-LAN mode, all devices are on the same subnet. This allows smart home devices (cameras, lamps, speakers) connected to different routers to "see" each other and be controlled from a single smartphone, which is impossible with a cascaded LAN-to-WAN connection.

Wireless bridging (WDS)

If laying a cable is absolutely impossible, you can use the technology WDS (Wireless Distribution System) or Bridge mode. This method allows a second router to receive the Wi-Fi signal from the primary router and broadcast it further. For WDS to work, both routers must support this technology, and preferably be of the same brand.

Setup begins with the primary router: in the wireless settings, set the channel (not "Auto"), enable WDS, and add the MAC address of the second router. Then, repeat the same steps on the second device. It's important that the network names (SSIDs) and encryption types match, and that the passwords are identical.

• 🔍 Search networks: The second router scans the air and finds the network of the first device.
• 🔗 Conjugation: The devices exchange encryption keys and establish a connection.
• 📡 Retransmission: The second router starts distributing the Internet received wirelessly.

It's worth remembering that the speed in bridge mode will always be lower than over a cable, as the radio module must simultaneously receive and transmit data. Furthermore, the distance between the routers shouldn't be too great, otherwise the signal will be weak and unstable.

Solving typical problems and conflicts

Even with proper setup, difficulties can arise. One of the most common issues is a lack of internet access on devices connected to the second router. This often happens if the gateway IP addresses and DNS aren't automatically assigned. In this case, try manually assigning DNS servers (for example, Google's: 8.8.8.8) in the WAN settings of the second router.

Another common error is a network "loop," which occurs when a cable is accidentally connected at both ends to the LAN ports of the same router, or when two DHCP servers conflict. If the network is down, check the LEDs: blinking all the lights at once often indicates a broadcast packet storm.

Users also often encounter devices that don't "see" printers or media servers located on another part of the network. This is a consequence of NAT running on the second router in cascade mode. The only solution is to set the second router to access point mode (LAN-to-LAN), so that all devices are on the same network segment.

⚠️ Please note: Router firmware interfaces (Asus, TP-Link, Keenetic, MikroTik) may differ. Menu item names may vary, but the operating logic (IP addresses, DHCP, ports) remains the same for all manufacturers.

FAQ: Frequently Asked Questions

This section contains answers to the most frequently asked questions that arise when combining routers.

Is it possible to connect routers from different manufacturers?

Yes, you can. Ethernet and Wi-Fi standards are universal. However, for WDS (wireless bridge) mode, compatibility is guaranteed only between devices of the same brand, and ideally, the same model. A cable connection works between any brand.

Do I need a special crossover cable to connect?

No, modern routers support Auto-MDI/MDIX technology, which automatically detects the cable type. You can use a regular straight-through patch cord, which is included with the device or available at any electronics store.

Will the internet speed decrease on the second router?

When connecting via cable (Cat5e or higher twisted pair), there will be no speed reduction; it is limited only by the provider's plan and port capabilities (100 Mbps or 1 Gbps). With a wireless connection, speed will inevitably drop, often by half, due to protocol overhead.

How do I find out the IP address of the second router if I forgot to change it?

Use the command ipconfig (Windows) or ifconfig (Linux/Mac) on the computer connected to the second router. The address listed in the "Default Gateway" line is the address of your second device.