How many devices can be connected to the Xiaomi router: real limits and optimization

In the smart home era, the question of how many gadgets a single hotspot can serve becomes critical. Owners of the Xiaomi ecosystem often face a situation where the network is crowded with smartphones, tablets, TVs and dozens of Mi Home sensors. The theoretical limit stated in the specifications often differs from what we get in practice with real load.

Manufacturers are putting numbers on the basis of ideal laboratory conditions, where the channel is noisy and traffic is minimal, but in reality, bandwidth is shared among all active customers, and even powerful models can start to choking. Understanding the physical limitations of the hardware will help you avoid sudden communication breaks and lags while playing or watching. 4K-video.

This article will help you understand the technical nuances of the work of wireless modules Xiaomi and Redmi, we will look at how software algorithms allocate resources and why the number of connected devices is not the only parameter that affects stability.

Theoretical and practical limitations of Wi-Fi modules

In the specifications of modern Xiaomi routers, such as the series AX3600 or AX9000, You can see some pretty impressive numbers, and it's often said that the device supports up to 128 or even 254 clients on the LAN. DHCP-pool IP-Addresses that the router can give.

The physical radio has much more stringent constraints, because the simultaneous transmission of data for a large number of devices leads to collisions and the need for constant packet transfer, and the bandwidth of the channel is divided not equally, but according to the requests of each client.

If you have 50 devices connected, but only one is generating active traffic (for example, a file is downloading), the network will work steadily. Problems begin when several gadgets try to use encryption and data transfer simultaneously. At this point, the packet queue comes into play, and latency increases dramatically.

⚠️ Note: Do not confuse the amount IP-bullet-point DHCP The router can give addresses to 200 devices, but it can't work with them all together.

The standard of communication is also becoming a key factor: older 2.4GHz devices take up airtime significantly longer than modern 5GHz Wi-Fi 6-enabled gadgets, a phenomenon known as the “low speed effect”: a fast router has to wait for a slow device to complete the transmission of its data packet.

Impact of Wi-Fi 5 and Wi-Fi 6 Standards on Number of Customers

Technology OFDMA (Orthogonal Frequency-Division Multiple Access, introduced in the Wi-Fi 6 standard, radically changes the approach to serving many customers. Unlike its predecessors, where the channel only transmitted data to one device at a particular time, the new standard allows you to divide the channel into subcarriers.

Xiaomi’s AX-enabled routers (such as the Mi Router AX1800) can serve dozens of devices simultaneously in a single time slot, which reduces latency and allows more gadgets to connect without losing performance. Multiplexing becomes more efficient.

In addition, the Target Wake Time (TWT) feature allows Internet of Things (IoT) devices to "negotiate" with the router about wake times, sensors and light bulbs do not compete for airtime all the time, but only communicate on a schedule, which significantly offloads the airwaves for active users.

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Use a separate guest network for smart home devices, which will isolate their traffic and reduce the load on the main network where your computers and consoles are located.

But even having Wi-Fi 6 isn't a panacea, because if most of your devices are old smartphones and tablets that were released 5-7 years ago, they won't be able to take advantage of the new technology. They'll run on old protocols, putting a strain on the router.

Hardware resources: processor and RAM

The number of connected devices depends on the power of the hardware inside the case. 4A or 4C, Often, they only have 64 or 128 MB of RAM, which is critically low for tablekeeping. NAT-broadcasts for hundreds of connections.

Every connection, every open tab in the browser on the phone, and every background update to the app creates a record in the NAT status table. When the memory is overflowing, the router starts resetting old connections or simply stops responding to requests from new devices, the processor can be loaded 100% at that point.

Flagship models like the Xiaomi Router AX9000 are equipped with multi-core processors and gigabytes of memory, which can hold thousands of simultaneous connections in memory, making them ideal for large apartments and offices.

QoS setting and traffic prioritization

Even if Xiaomi’s router is physically capable of holding many connections, without setting priorities properly, important tasks can slow down.

In the management interface available at 192.168.31.1 or via the Mi Wi-Fi app, you can prioritize game consoles or work laptops, ensuring that even when you download a large file on another device, your ping in the game remains low.

There are two main modes of QoS operation: device priority and traffic type priority. The first option is more effective for static setups, where you know exactly which gadgets require stability. The second is useful if you just need to reserve a channel for video calls.

⚠️ Warning: Enabling QoS on weak routers can reduce overall internet speeds, as the processor has to spend resources analyzing and sorting packets.

To set up, go to Settings → QoS. Here you will see a list of connected devices. Just drag the desired gadgets to the top of the list or turn on the Game Mode / Mode switch.

Optimizing the network for the smart home Xiaomi

Owners of the Mi Home ecosystem know that there can be dozens of sensors, light bulbs, and sockets, and these devices create a specific load: they transmit little data but require a constant maintenance of a connection (keep-alive packets).

For such scenarios, it is critical to separate networks: the main bandwidth of 5 GHz should be left for multimedia and the Internet, and the entire fleet of smart equipment should be transferred to 2.4 GHz. Some models of Xiaomi routers allow you to create isolated VLANs or guest networks specifically for the IoT.

It is also recommended to disable features that are not in use. For example, if you do not have a printer on the network, disable Samba or FTP support inside the router. This will free up some CPU resources to handle network requests.

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Splitting your smart home devices into a separate 2.4GHz frequency or guest network is the best way to keep the main Wi-Fi channel stable for entertainment and work.

Another important aspect is the firmware update. Xiaomi engineers regularly release patches that optimize the TCP/IP stack and wireless drivers. You can check for updates in the Status → System Update section.

Solving network congestion problems

If you notice that devices are constantly falling off or the Internet is unstable, the first step is to diagnose, and it's not always a problem with the number of devices, sometimes it's overheating or interference from the neighboring routers.

Try changing the channel. The Mi Wi-Fi app has a signal optimization feature that automatically selects the least loaded channel, and you can manually do this in the wireless settings by selecting channels 1, 6 or 11 for the 2.4 GHz band.

In extreme cases, if you have a lot of devices (more than 50-70), one router may not be able to cope physically, in which case the solution is to build a Mesh network of several Xiaomi routers or install a professional controller.

⚠️ Attention: Regularly restarting your router (once a week) helps clear your cache DNS table ARP, This often solves network hanging problems without deep diagnostics.

Remember, stability is more important than maximum speed, it is better to limit the number of active customers or add a second access point than to put up with constant connection breaks.