When setting up a home network, users often come across the acronym DHCP, especially in the interfaces of Xiaomi routers. Many perceive this parameter as a complex technical detail that is better not to touch. However, understanding how the dynamic distribution protocol works allows you to significantly improve the stability of the connection and avoid address conflicts between devices. In the Xiaomi ecosystem, whether it is a budget router or a flagship model, this mechanism plays the role of a traffic manager.
Imagine that your router is an administrator in a large office, and every connected device (smartphone, TV, laptop) is an employee. Without a clear system, everyone would choose their own workplace, leading to chaos and fights over chairs. DHCP Automates this process by issuing unique "passes" or IP-The Xiaomi Mi Router and Redmi Router are optimized to work with a large number of customers.
In this article, we will discuss in detail why standard settings may not be enough for a modern smart home, how to properly configure the address pool, reserve a static IP for a printer or security camera, and what to do if the service stops issuing addresses. A competent network configuration is the key to high Internet speeds and no connection breaks when playing or streaming.
The principle of DHCP operation in Xiaomi networks
The Dynamic Host Configuration Protocol is a request-and-supply protocol. When you connect a Xiaomi smartphone to Wi-Fi, it sends out a broadcast request for a server. IP-And if the device agrees, it accepts the address, and it enters the lease table, and it takes a fraction of a second, and it's invisible to the user.
It is important to understand the difference between a dynamic and a static address. Dynamic IP can change with each reconnection of a device, which is normal for guest phones. However, for fixed devices such as NAS network storage or Mijia smart lamps, it is better to use fixed addresses. Xiaomi routers allow you to flexibly manage these parameters through a web interface or the Mi Home mobile application.
The lease term is another critical parameter. Xiaomi routers default to 120 minutes (2 hours). This means that the device must update its pass every two hours. If the device has not been online for a long time, the router can take the address and give it to another client. For a stable smart home, this interval is often increased.
⚠️ Attention: Range change DHCP-server (e.g. from 192.168.31.x on 10.0.0.x) It will require reconnecting all devices on the network, and make sure you don't lose access to the router during the setup process.
Modern router models like the Xiaomi Router AX3600 or AX9000 use improved distribution algorithms that minimize collisions even when connecting dozens of devices. Older models may require manual rebooting of the service when the client table is overflowing. Understanding these nuances helps you choose the right customization strategy for your particular hardware.
Setting up DHCP-servers via web interface
To enter the settings, you need to open the browser and enter the gateway address, usually 192.168.31.1 or miwifi.com. Once logged in (the password often matches the Wi-Fi password or is set when you first set up), go to Settings. Here you are interested in the Local Area Network (LAN) or Network Settings tab. It is in this section that the main control levers of the protocol are hidden.
The first thing to look at is the server state. It has to be turned on (Enabled). If you turn off DHCP, the router will stop giving out addresses, and new devices will not be able to connect to the network without manually registering IP. Next, you will adjust the initial and final pool addresses. For example, the range from 192.168.31.2 to 192.168.31.254 allows you to connect up to 253 devices at a time.
You can change your lease time in seconds or minutes. For a typical apartment, the standard 7,200 seconds is fine. However, if you have a lot of Internet of Things (IoT) devices that rarely transmit data but must always be online, it makes sense to increase this to 86,400 seconds (24 hours) or even more, which will reduce the load on the router's processor.
Remember to save the changes with the Apply button. The router can briefly break the connection to update network settings. If you lose access to the interface after saving, try updating the browser page or entering IP-In some MIWiFi firmware, changing the subnet requires rebooting the router itself.
Static reservation IP-address
One of the most useful features in Xiaomi routers is the ability to link MAC-device address to a particular IP. This is called static renting or reservations, and it's critical to adjust port overhead, to organize access to the port. FTP-server or smart home management, where the gateway must know the exact address of the command executor.
To set up, look for a list of connected clients, which is usually displayed on the home page or under Settings. LAN». Select the device from the list (for example, yours) NAS or IP-camera) and press the edit button or "Anchor» (Bind/Reserve). In the window you can set a fixed IP-The address that the router will always give to this device.
☑️ Checklist for reservation of address
Using reserved addresses makes it easier to administer the network, so you no longer have to check which printer's address is each time you send a document, you just go to the printer's permanent address, and it also solves the problem of "missing" devices in smart home systems, which sometimes lose communication when you change the IP.
It is recommended to move reserved addresses outside the main dynamic pool to avoid confusion, although modern Xiaomi routers are able to handle the priority of static entries. For example, if a pool of dynamic addresses is from 2 to 100, static addresses are conveniently assigned from 101 to 200.
Diagnostics and elimination of connection errors
Frequent problem – the Xiaomi router stops issuing IP-Addresses and devices are in the status of "Receiving" IP-This may be caused by overflow of the table. DHCP The first step should always be to reboot the router, which clears RAM and resets the hanging processes.
If the problem repeats, check the size of the pool of addresses. If the range is too small (for example, only 10 addresses) and the devices in the house are more, new guests simply will not have enough "numbers." Expand the final address of the pool to increase the number of slots available. It is also worth checking whether the second one is included. DHCP-server on the network, for example, on a second router connected to the LAN.
⚠️ Attention: The presence of two active DHCP-servers on the same network (double servers) NAT or a router conflict) causes the network to fail completely, and the devices will receive the wrong gateway addresses and will not be able to access the Internet.
In difficult cases, resetting network settings on the client itself (smartphone or PC) helps. On Android, this is done via Device Management -> Wi-Fi -> Forget the network. On Windows, you can use TCP/IP stack reset commands. Sometimes changing the Wi-Fi channel helps if interference interferes with the transmission of DHCP service packets.
For advanced users, diagnostics are available through the system log files, if the corresponding option is enabled in the firmware. MAC-So the addresses ask for resources and whether they get a response, and this allows you to identify noisy neighbors or faulty devices that are constantly asking for reconnection.
DHCP on Xiaomi client devices
Not only routers, but Xiaomi smartphones (MIUI/HyperOS) have their own DHCP settings. The default is to get IP automatically on the phone. However, in the Wi-Fi menu, in the properties of a particular network, you can switch IP settings from DHCP to Static, which is useful if you are on a restricted network or for debugging.
When manually entering data, it is necessary to specify IP-address, subnet mask (usually 255.255.255.0), gateway (router address) and DNS-A single-digit error will result in no Internet connection. DHCP This is the only correct choice, as it guarantees automatic correct setting of all parameters.
In rare cases, Xiaomi smartphones encounter a bug where the device cannot get an address from the router, although other devices work normally. IP, manually entering data, saving and then returning back to mode DHCP. This “shaking” of network settings often solves the problem of hanging. DHCP-Android client.
Secret DNS to Accelerate
Also worth mentioning is the Private DNS feature in Xiaomi’s connection settings, which uses an encrypted DNS-over-TLS connection, which improves security, but in some rare cases can conflict with corporate network settings or parental controls tied to DNS filtering.
Optimization for Smart Home and IoT
Xiaomi’s smart home is made up of dozens of devices, from light bulbs to robot vacuum cleaners, each requiring a stable connection. The main problem with budget IoT gadgets is that they don’t tolerate frequent shifts. IP-So, the long process of re-renting is critical for the smart home segment. DHCP-server.
It is recommended to create a separate guest Wi-Fi network for IoT devices if the router supports guest mode with isolation. Or, conversely, to allocate a pool of addresses specifically for the smart home. Some users are configuring Xiaomi routers with alternative firmware (OpenWrt) to gain even more subtle control over queues and traffic priorities.
| Parameter | Recommended value | Description of the impact |
|---|---|---|
| Range of addresses | 192.168.31.2 - 192.168.31.254 | Maximum number of connected devices |
| Time for rent | 86400 sec (24 hours) | Reduces network load for IoT devices |
| DNS server 1 | Router address or 8.8.8.8 | Domain response rate |
| Gateway | 192.168.31.1 | Internet access point |
It is important to monitor the router’s firmware. Xiaomi regularly releases updates that fix network stack errors. An outdated version of the software may contain bugs that lead to memory leaks during the DHCP process, which over time “strangles” the router and requires it to restart.
⚠️ Note: Do not set the rental time DHCP It's going to create a storm of broadcast requests that puts down a Wi-Fi channel and makes the network unusable for all users.
Understanding how DHCP works in your Xiaomi router gives you that control. You're no longer dependent on randomness, but you're managing data flows, making sure that everyone in your family and smart devices can enjoy the Internet.
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The stability of a smart home depends on the correct setup of DHCP: increase the rental time and reserve addresses for key devices to avoid communication breaks.