Abnormal DHCP service of Xiaomi router is a relatively common problem, which usually causes the device to be unable to obtain an IP address or be unable to access the Internet. DHCP (Dynamic Host Configuration Protocol) is a network protocol that dynamically assigns IP addresses to devices in a network. When an exception occurs in the DHCP service, some measures need to be taken to fix it.
1. Check the router power supply and connection.
First, check that the router is powered on properly and that the indicator light is normal. If there is no problem with the power supply, check the connection of the router next. Make sure that the WAN port of the router is connected to the broadband modem or higher-level network device, and the LAN port is connected to the device that needs to access the Internet. If the connection is abnormal, the DHCP service may be abnormal.
2. Restart the router.
If the power and connection of the router are normal, but the DHCP service is still abnormal, you can try restarting the router. Unplug the router and wait a few minutes before plugging it back in. This clears the cache and temporary files inside the router and can sometimes fix the problem of DHCP service exceptions.
3. Check the DHCP service settings.
If the DHCP service is still abnormal after the router is restarted, you need to check the DHCP service settings. First of all, open a browser on your computer, enter the router's management IP address, and enter the router's management interface. Then, enter your administrator username and password to log in.
In the admin interface, find the DHCP Server option and make sure that the DHCP server is turned on. If the DHCP server is not enabled, click the "Turn on DHCP Server" button to enable the DHCP service. In addition, you need to check whether the settings of the DHCP service are correct, such as IP address pool range and subnet mask.
4. Update the router firmware.
If the DHCP service exception cannot be resolved by the preceding steps, there may be a problem with the router firmware. You can try updating your router firmware to the latest version. In the management interface of the router, find the "System Tools" or "Firmware Upgrade" option, and follow the prompts to upgrade the firmware. After the upgrade is complete, restart the router and check whether the DHCP service is normal.
5. Release and renew IP addresses.
If the DHCP service is set correctly, but you still encounter DHCP exceptions, you can try to release and renew the IP address. Find the relevant function in the DHCP option of the Mi router management interface, and click to perform the release and renewal operation. This clears the assigned IP address and reassigns a new one, sometimes resolving the issue of DHCP service exceptions.
6. Check MAC address filtering.
Sometimes DHCP service abnormalities can be related to MAC address filtering. In the management interface of the router, check whether the MAC address filtering feature is enabled and make sure that the MAC address of the device that needs to access the Internet has not been filtered out by mistake. If it is filtered, it needs to be added to the allowlist.
7. Reset the router to factory settings.
If none of the above methods can solve the DHCP service abnormality, you can consider resetting the router to factory settings. But note that this will erase all configuration information on the router, including the wifi name and password, etc. So, be sure to back up important configuration information before you do this.
In the management interface of your router, find the "System Tools" or "Factory Reset" option and follow the prompts to reset it. After the reset is complete, reset the router parameters and check whether the DHCP service is normal.
Summary: With the detailed operation of the above seven steps, you should be able to fix the problem of abnormal DHCP service on Xiaomi routers. In the actual operation, please select the appropriate method for repair according to the specific situation. At the same time, it is advisable to be patient and attentive during the repair process to ensure that each step is performed correctly. If the problem persists, please consider contacting official customer service or seeking professional technical support for help.