The situation where a single device on a local network "hogs" all the bandwidth is familiar to many home internet users. While someone is downloading heavy games or watching 4K videos, other users' websites can take hours to load, and video calls can turn into slideshows.
The solution to this problem is Speed Limit (Bandwidth Control) directly at the router level. This allows for fair distribution of channel bandwidth among all connected clients, ensuring stable operation even under high load.
In this article, we will examine the technical aspects of setting up traffic priorities and consider the operation of algorithms QoS (Quality of Service) and provide step-by-step instructions for popular equipment models. You'll learn to manage your network, rather than rely on its whims.
Why is artificial bandwidth limitation necessary?
The main goal of implementing limits is not simply to prohibit someone from using the internet, but to optimize the operation of the entire network. Modern data transfer protocols, such as TCP, are designed in such a way that the active loader tries to occupy the maximum available channel, ignoring the needs of other devices.
The second important aspect is safetyIf someone else connects to your Wi-Fi, limiting the speed will prevent them from quickly downloading large amounts of data or using your connection for botnet attacks that could be detected by your ISP.
⚠️ Caution: Before making changes to your router settings, make sure you're connected to it via cable. Changing Wi-Fi or QoS settings may temporarily interrupt your wireless connection, and you'll lose access to the control panel.
Also worth mentioning parental controlBy limiting the speed, you can prevent your child from watching high-quality videos on their tablet, thereby motivating them to focus on studying or relaxing without gadgets, without completely disconnecting them from the internet.
How QoS and Bandwidth Control Work
Technically, the traffic management process is implemented through a mechanism Quality of ServiceThe router analyzes passing data packets and assigns them priorities or hard limits depending on the specified rules.
There are two main approaches to resource allocation. The first is prioritization, where critical traffic (such as VoIP telephony or online gaming) is passed through first. The second approach is Bandwidth Control, which sets hard speed caps in kilobits or megabits per second for specific IP addresses.
What is the difference between WMM and full QoS?
WMM (Wi-Fi Multimedia) is a simplified standard that operates only in the wireless network segment and sorts traffic by type (voice, video, best effort). Full-fledged QoS on the router manages all traffic incoming and outgoing through the WAN port and allows you to set specific limits.
It's important to understand that configuring these features requires processor resources from the router itself. On low-end, low-performance models, enabling complex filtering rules can reduce overall speed Internet for all users, since the CPU will not be able to process data streams.
Preparing for setup: static IP and binding
Before creating restriction rules, you need to fix the addresses of the devices for which these rules will apply. Dynamically assigning addresses through DHCP server This may result in the limits being applied to another gadget after a reboot.
You need to find a section in the router interface, often called Address Reservation, Static DHCP or IP-MAC binding. Here you map the unique physical address of the network card (MAC address) with a permanent IP address.
- 📱 Go to the client list (Client List) and copy the MAC address of the desired device.
- 🔒 Select a free IP address from your local network pool, for example,
192.168.0.150. - 💾 Save the settings and reconnect the device so that it receives a new fixed address.
After this procedure, the device will always receive the same address, which will allow you to create stable traffic filtering rules that will not be lost after a power outage.
☑️ Preparing for traffic restrictions
Instructions for TP-Link and Asus routers
In TP-Link devices, the function is often called Bandwidth ControlYou need to go to the appropriate menu and activate general control, specifying the maximum speed of your plan (Line Speed) so that the router calculates the percentage correctly.
Then a new entry is created (Add New). The IP Range field specifies the device address (or range), and the Egress/Ingress Rate fields set the limits. Egress is the outgoing speed (downloading files from the device), Ingress is the incoming speed (downloading).
| Parameter | Meaning | Description |
|---|---|---|
| IP Address | 192.168.0.105 | Target device address |
| Port Range | 0 - 65535 | Port range (all) |
| Protocol | ALL | All protocols |
| Egress Bandwidth | 1024 - 2048 | Upload limit (Kbps) |
For routers Asus the logic is similar, but the interface is called Adaptive QoS or Bandwidth Limiter In the WAN section, you can not only set hard limits but also drag the sliders to visually distribute the bandwidth percentage between game consoles, PCs, and mobile devices.
⚠️ Note: TP-Link interfaces often display speed values in Kbps, not Mbps. To limit the speed to 5 Mbps, enter 5120. Please be careful when calculating!
Setting up restrictions on Keenetic and MikroTik
Routers Keenetic (formerly ZyXEL) offer the most user-friendly interface. In the section My Networks and Wi-Fi Select the connected device. In the properties window that opens, find the slider Speed Limit.
This approach is smart: simply move the slider, and the system automatically converts the values into easily understandable megabits. You can also set an access profile that will operate according to a schedule, for example, limiting the speed only in the evening.
For advanced users and equipment MikroTik the setup is done through Queues (Queues). On the menu Queues -> Simple Queues A new rule is created where the Max Limit fields specify the Upload and Download values.
MikroTik syntax allows for the creation of tree-like queue structures, providing granular control. For example, you can restrict the entire office subnet, but within it prioritize the accounting server by setting higher limits.
Comparison of traffic restriction methods
The choice of method depends on your goals and the hardware model. Strict IP address restrictions are effective, but require manual configuration for each device. Prioritization (QoS) is more convenient for multimedia, but less predictable for precise calculations.
Some providers offer their own network-level solutions, but they are often less flexible. Local router configuration gives you complete control and is not dependent on updates from the service provider.
It's also worth considering that some modern games and streaming services use complex compression and adaptive bitrate algorithms that can bypass simple limits if protocol ports are not configured correctly.
Frequently Asked Questions (FAQ)
Is it possible to limit the speed only for certain websites?
This is difficult to do using standard router tools, as filtering is usually based on IP or ports, not domain names. To block specific resources (such as YouTube), it's better to use the filtering function. Parental control or DNS filtering, if supported by your model.
Will everyone's overall internet speed decrease if I enable QoS?
On powerful routers, the difference is imperceptible. However, on budget models with weak processors, enabling complex queuing rules can create additional CPU load, which theoretically can slightly reduce the maximum link speed (usually by 5-10%).
What should I do if after setup the device stops connecting to the network altogether?
Most likely, you've set the limit too low (for example, 1 Kbps) or made a mistake in the subnet mask. Try temporarily disabling Bandwidth Control in your router settings, checking the network availability, and then adjusting the limits.
Do these settings work if I am connected via a mobile 4G router?
Yes, the operating principle is the same for any device distributing Wi-Fi. However, mobile router interfaces (MiFi) are often limited and may lack manual Bandwidth Control, leaving only basic device priority.