The problem of "dead zones" in apartments is familiar to many Rostelecom subscribers. The signal from the provider's base terminal is often unable to penetrate load-bearing walls or ceilings, especially if the equipment is installed in the hallway and you are in the back bedroom or kitchen. Standard methods, such as relocating antennas or changing the channel, don't always produce the desired results, and the only effective solution is network expansion.
The most stable and fastest way to resolve this issue is to create a wired connection between the primary ISP modem and the secondary router. This approach, often called cascading, allows you to create a single local network with coverage throughout your entire home. Unlike wireless repeaters, a wired connection doesn't cut speed in half and guarantees minimal latency.
In this article, we'll walk you through the step-by-step process of connecting a second router to Rostelecom equipment. We'll cover selecting the right cable, configuring IP addresses to avoid conflicts, and properly switching device operating modes. You'll learn how to transform two separate devices into a single, powerful internet distribution system.
Equipment preparation and cable selection
Before you begin setting up the software, you need to physically prepare all the components of your future network. You'll need the primary router, which has already been configured by your provider and distributes the internet, as well as a second router that will act as an access point or range extender. It's important to ensure that the second device is working properly and, ideally, reset to factory settings.
The key element here is the connecting cable. A standard patch cord, a twisted-pair cable with RJ-45 connectors at the ends, is used to establish communication between routers. The cable's quality directly impacts the stability of the connection, so avoid using cables that are too long or damaged.
- 🔌 Cable type: Use a Cat5e or Cat6 cable; they provide speeds of up to 1 Gbps and higher, which is critical for modern tariffs.
- 📏 Length: Measure the distance between installation points in advance, leaving a small margin of 0.5–1 meter for ease of installation.
- 🛠 Serviceability: Visually inspect the connectors for oxidation or damage to the plastic clips.
⚠️ Attention: If you plan to install cable throughout your apartment in advance, remember that RJ-45 connectors are a specific size. Pulling the finished cable through narrow openings in walls or baseboards may be impossible without removing and re-crimping the connectors.
It's also worth deciding in advance where to install the second router. It should be located approximately halfway between the main signal source and the area with poor internet coverage. This will create a smooth transition and avoid sudden drops in connection quality.
Connection diagram: LAN or WAN?
There are two main ways to connect two routers with a cable, and the choice depends on how you want to manage the network. The first option involves connecting the LAN port of the primary router to the WAN (Internet) port of the second router. In this case, the second device creates its own subnet with its own rules.
The second option, most often recommended for simple coverage expansion, involves connecting the LAN port of the primary router to the LAN port of the secondary router. In this scenario, the secondary router operates as a switch or access point, eliminating the need for double network address translation (NAT), simplifying data exchange between devices on the network.
For Rostelecom users who simply want to extend the signal to a distant room, operating via LAN ports is the most suitable. However, if you need network isolation or separate settings for guest Wi-Fi, you can consider using the WAN port.
It's important to understand the difference in how ports work. The WAN port is designed to receive signals from the outside (from the ISP), while LAN ports are designed to distribute data within the local network. An incorrect connection can result in the second device simply not having internet access.
Configuring IP addresses to avoid conflicts
The most common error when connecting a second router is an IP address conflict. By default, most home routers, including devices from Rostelecom (Sagemcom, Sercomm, Eltex), have an IP address 192.168.1.1 or 192.168.0.1If both devices have the same address, the network will not work.
To avoid this, you need to change the IP address of the second router before connecting it to the primary one. To do this, connect a computer or laptop to the second router via cable, log in to its web interface, and find the LAN settings section. Here, you need to enter a unique address that is in the same subnet but has a different last digit.
For example, if the address of the main router is Rostelecom 192.168.1.1, then the second device can be assigned an address 192.168.1.2 or 192.168.1.254The main thing is that this address is not in the DHCP pool range of the main router, so that it is not automatically assigned to another device.
| Parameter | Main router (Rostelecom) | Second router (setup) |
|---|---|---|
| IP address | 192.168.1.1 | 192.168.1.2 |
| Subnet mask | 255.255.255.0 | 255.255.255.0 |
| Gateway | 192.168.1.1 | 192.168.1.1 |
| DNS | Automatic / 8.8.8.8 | 192.168.1.1 (or 8.8.8.8) |
After changing the IP address, the router will ask you to reboot. Remember that to access the second device's settings, you'll need to enter the new address in your browser. 192.168.1.1 will stop leading to this device.
Disabling the DHCP server on the second device
A critical step when setting up a LAN-to-LAN network is disabling the DHCP server on the second router. In any local network, there can only be one "distributor" of addresses—usually the main gateway, i.e., the ISP router. If both devices try to distribute IP addresses to connected devices, chaos will result, and the internet will be lost.
Find the section in the interface of the second router DHCP Server (often found in the LAN or Network menu). Set the switch to Disable Or uncheck "Enable." After saving the settings, the second router will stop assigning addresses and will simply forward requests to the main router.
☑️ DHCP Configuration Checklist
If you're using a WAN port connection (less commonly recommended for simple expansion), DHCP should be left enabled, but the address range should be changed to ensure it doesn't overlap with the primary address pool. However, for a LAN-to-LAN connection, disabling DHCP is mandatory for network functionality.
⚠️ Attention: After disabling the DHCP server on the second router, managing its settings via Wi-Fi may become unavailable if your computer receives an IP address from the primary router, which is unaware of the second router's existence. To reconfigure it, connect to it only via cable, manually entering the IP address on your computer's network card.
Setting up a wireless network and passwords
Once the wired portion is set up, it's time to focus on Wi-Fi. To ensure seamless roaming (at least basic), it's recommended to set the same network names (SSIDs) and passwords on both routers. This way, your devices (smartphones, laptops) will automatically switch to the point with the stronger signal.
However, there's a caveat: older devices may lock onto the weak signal of a distant router, refusing to switch to a nearby one. To avoid this, you can give different names to the networks, for example, Home_WiFi And Home_WiFi_Ext, or use different broadcast channels so that they do not jam each other.
In the wireless settings (Wireless Settings) Select the channel manually. For the 2.4 GHz band, channels 1, 6, or 11 are optimal, as they don't overlap. If the primary router operates on channel 1, it's best to assign the secondary router to channel 6 or 11.
Why can't you put the same channels?
If both routers broadcast on the same channel (for example, channel 6) and are within line of sight of each other, interference will occur. The signals will overlap, causing packet loss and reduced speed. Different channels allow devices to operate in parallel without interfering with each other.
Be sure to set a strong encryption type. For modern networks, the standard is WPA2-PSK or WPA3Using outdated WEP or WPA encryption makes your network vulnerable to hacking in minutes, even without specialized knowledge.
Performance testing and diagnostics
After completing all the settings, connect the routers with a cable according to the selected configuration (LAN-LAN or LAN-WAN). The LEDs on both devices should light up in the appropriate color (usually green or orange), indicating a physical connection.
Check the connection from a device within range of the second router. Run a speed test using services like Speedtest. If the speed matches your Rostelecom plan (or is slightly lower due to cable loss), then the setup was successful.
If problems arise, check the cable's integrity—sometimes replacing the patch cord is sufficient. Also, make sure the firewall on the second router isn't blocking local traffic if you're using a WAN connection. For a home network, using Bridge mode or simply disabling DHCP on the LAN-to-LAN connection is the most straightforward and trouble-free solution.
Frequently Asked Questions (FAQ)
Is it possible to use a router from a different manufacturer than TP-Link or Asus?
Yes, you can. For cabled connections, the brand of the second router doesn't matter. The main thing is that it supports standard Ethernet protocols and has the ability to disable the DHCP server. Configuration is done through any manufacturer's web interface using the same principle.
Do I need a special cable to connect routers?
No, the modern Auto-MDIX standard, supported by virtually all routers of the last 10-15 years, allows the use of a regular straight-through patch cord. A special crossover cable is no longer required; the device will automatically detect the connection type.
Will my internet speed decrease when I connect a second router?
When properly connected via Gigabit ports and Cat5e/Cat6 cable, speed loss will be minimal and unnoticeable to the user (less than 5-10%). A significant speed drop is only possible with very old equipment with 100 Mbps ports or damaged cable.
What should I do if the internet disappears on all devices after setup?
Most likely, there's an IP address conflict or you've configured the gateway incorrectly. Disconnect the second router from the network, reset it using the Reset button, and then try configuring the IP address and disabling DHCP again, without first connecting it to the primary router via cable.