How to set up two routers on the same network: diagrams and instructions

Increasing wireless network coverage is a common concern for owners of large apartments or country houses. Often, the power of a single device isn't enough to provide a stable signal in all rooms, especially if the walls are made of concrete or brick. The solution is to combine two routers into a single local area network, which not only expands the coverage area but also increases the number of available ports for wired connections.

Implementing this setup requires proper physical device connections and careful software configuration. You'll need to select a connection method, determine the secondary device's operating mode, and correctly assign IP addresses to avoid conflicts. Errors during the configuration phase can lead to connection interruptions or inability to access local resources, so it's important to follow the steps precisely.

In this article, we'll cover two main connection methods: cascading via a WAN port and creating a single access point via LAN ports. Both methods have their advantages and disadvantages, depending on the hardware model and specific network requirements. Understanding the operating principles DHCP servers and routing will help you avoid common configuration errors.

⚠️ Note: Router management interfaces from different manufacturers (Asus, TP-Link, Keenetic, Mikrotik) may differ significantly. Menu item locations and function names vary, so look for similar sections in your equipment's settings.

Preparing equipment and selecting a connection diagram

Before starting setup, you need to decide on the scheme you'll use to connect your devices. The choice depends on what you're trying to accomplish: simply extending your Wi-Fi range or creating a complex network with traffic segmentation. Most home setups use one of two methods: LAN-WAN (cascade) or LAN-LAN (access point mode).

The LAN-WAN method involves the second router creating its own subnet. This is convenient if you need to isolate devices connected to the second router from the main network, or if you want to use parental controls and firewall features on the second device independently of the first. In this case, devices connected to different routers will see the internet, but may not see each other on the local network without additional configuration.

A LAN-to-LAN setup turns a second router into a simple Wi-Fi switch. All devices are connected to a single, flat network, visible to printers, NAS storage, and media servers regardless of which router they're connected to. This option is ideal for creating a unified information space in the home. A cable is required for implementation. Ethernet Category 5e or higher cable laid between devices.

Make sure you have access to the web interfaces of both devices. If you plan to use a wired connection, prepare a sufficiently long patch cord in advance. For the initial setup of the secondary router, it's best to connect it to a computer separate from the main network to avoid address conflicts during the configuration process.

Setting up the main router (primary node)

Setup begins with the main device, which is directly connected to the provider. First, you need to make sure that the service is activated on it. DHCP serverThis is what will distribute IP addresses to all connected devices, including the second router if we choose the LAN-to-LAN configuration. This feature is usually enabled by default, but it's worth checking.

It is important to note the gateway IP address of the main router. Most often, this is 192.168.0.1 or 192.168.1.1You'll need to enter this address in your browser to access the settings. It's also worth checking the address range assigned by the DHCP server. For example, if the server assigns addresses from 100 to 200, then the static IP for the second router should be selected outside this range, such as 192.168.0.2.

If you are using a LAN-WAN setup, make sure the local network IP addresses on both routers are not the same. For example, if the main router uses 192.168.0.1, then the second one will need to be assigned an address from another subnet, for example, 192.168.1.1This will prevent routing conflicts.

In some modern models, such as Keenetic or Asus With AiMesh support, the main router can be configured to use special "Master" or "Master Node" modes. In such systems, configuration is automatic, and manual DHCP settings may not be necessary if you're using a single-vendor ecosystem.

Changing the IP address and disabling DHCP on the second router

The most critical step is preparing the secondary device. Connect it to your computer with a cable, but don't connect it to the main router yet. Go to the web interface and find the local network settings section, often called LAN or Local NetworkHere you need to change the IP address of the router itself.

The new address must be in the same subnet as the main router, but be unique. If the main router has an address 192.168.0.1, ask the second one 192.168.0.2This will allow you to access its settings in the future by simply entering this address in your browser while on the public network. After changing the address, the device may reboot, and you will need to access it using the new IP address.

⚠️ Caution: After changing the secondary router's IP address, your computer may lose connection to it if it has a static IP address. Make sure your PC is set to obtain an address automatically (DHCP), or reconnect the cable to update the network settings.

The next step is to disable the DHCP server on the second router. This is a requirement for a LAN-to-LAN setup. There should only be one address server (the main router) in the network. Leaving DHCP enabled on both devices will cause a conflict, and the devices will receive incorrect gateway settings, resulting in no internet connection.

In the interface TP-Link or Tenda This option is usually located in the section DHCP -> DHCP Settings, where you need to select "Disable". In routers Mikrotik you need to remove or disable the service dhcp-server in the corresponding menu. After applying the settings, the router may prompt you to reboot.

Implementation of the LAN-to-LAN scheme (access point mode)

A LAN-to-LAN setup is the most preferred for creating a unified home network. Once you've changed the second router's IP address and disabled DHCP on it, you can begin the physical connection. Take a network cable and plug one end into any available space. LAN port main router.

Connect the other end of the cable to any free LAN port Secondary router. The WAN (Internet) port on the second device in this setup remains free and unused. Thus, the second router effectively becomes a switch with wireless access point functionality. All devices connected to it will receive IP addresses from the main router.

To ensure seamless roaming (at least at a basic level), it's recommended to configure the network name (SSID) and password on the second router exactly the same as on the first. However, select different Wi-Fi channels to avoid overlapping. For example, if the primary router operates on channel 1, set the secondary router to channel 6 or 11.

Check your network. Connect your device to the second router's Wi-Fi and try accessing resources connected to the first router (for example, a network printer or a folder on your computer). If you can access the internet and the device works, the setup is correct.

Implementation of the LAN-WAN scheme (cascade connection)

This method is suitable if you need to isolate the network of a second router or if your ISP limits the number of connected devices by MAC address and you want to hide them behind a single address. In this mode, the second router operates as a fully-fledged independent router, creating its own subnet.

The physical connection is different from the previous option. The cable from the main router (from the LAN port) is inserted into WAN port (often labeled as "Internet") of the secondary router. In the WAN settings of the second device, select the "Dynamic IP" connection type so that it automatically receives an address from the primary router.

It's important to make sure the subnets on both devices are different. If the main router is handing out addresses 192.168.0.x, then the local network of the second router should be, for example, 192.168.2.xIf the addresses match, a conflict will occur, and the Internet on the second router will not work. DHCP on the second router in this mode must be included.

The downside of this setup is double network address translation (NAT), which can negatively impact gaming or torrenting speeds. Furthermore, devices on different subnets won't be able to see each other by default, making file sharing or printing difficult.

Why does LAN-WAN scheme require different IP ranges?

If the ranges overlap, the router won't be able to determine whether to send data packets to the local network or to the external network. This will result in connection loss.

Setting up a wireless bridge (WDS) without cables

If running a cable between the routers isn't possible, you can use WDS (Wireless Distribution System) technology or Repeater/Extender mode. This allows you to connect the routers wirelessly. However, keep in mind that wireless connection speeds are always slower than wired connections and depend on distance and interference.

To configure WDS, both routers must support this technology and, preferably, be from the same manufacturer or use the same chipsets. Configuration is performed in the wireless network section (Wireless). On the main router, you need to enable WDS and specify the MAC address of the second device, and on the second device, scan the network and connect to the first.

In modern systems such as Asus AiMesh, Keenetic Mesh or Tenda NovaThe process is simplified to a minimum. Simply add a new device to the system via a button or app, and they will automatically configure the settings. Older WDS methods require manual configuration of channels and encryption modes, which must match on both devices.

⚠️ Please note: When using a wireless bridge, the internet speed on the second router may drop by 50% or more, since the radio module works both to receive and transmit data simultaneously, unless a separate radio channel is used for the backhaul.

Repeater mode often eliminates the need for manual IP address configuration, as it fully replicates the main router's settings. However, this mode's functionality is limited: guest network settings or traffic prioritization for repeater clients are often unavailable.

Frequently Asked Questions (FAQ)

Is it possible to connect routers from different manufacturers?

Yes, this is possible, especially when using a LAN-to-LAN setup. The key is to configure IP addresses correctly and disable DHCP on the second device. However, mesh networking (seamless roaming) features typically only work between devices of the same brand.

Why is there no internet on the second router after setup?

The most common issue is an IP address conflict (the primary and secondary routers have the same address) or DHCP not being disabled on the secondary router (in a LAN-to-LAN setup). Also, check the cable and ensure the correct port (LAN or WAN) is selected depending on the setup you've chosen.

Do I need a cable to set up a second router?

For initial setup (changing IP and disabling DHCP), it's best to use a cable to avoid connection losses. After setup, if you're using a LAN-to-LAN connection, a cable is required for data transfer. In repeater mode, a cable is not required.

How do I reset the second router if I'm confused?

Use the button Reset on the device's body. Press and hold it for 10-15 seconds while the device is powered on. The router will reset to factory settings, and you can start the setup again by connecting to its standard Wi-Fi or via cable.