Routers shutdown after turning off pc

I. troubleshooting IP address conflicts and DHCP settings 

1. Check the DHCP server in the intranet. 

-Ensure that there is only one DHCP server (usually a router) in the network, and other devices (such as old routers or smart devices) may accidentally turn on the DHCP service, resulting in IP allocation conflicts. Turn off redundant DHCP services. 

-Log in to the router management interface (usually enter 192.168.1.1 or 192.168.0.1 through the browser), check whether the DHCP settings are normal, and confirm that the IP address pool range does not conflict with other static IP devices. 

2. Verify the IP allocation method of the computer 

-Check whether the IP acquisition method of the problem computer is "DHCP". If static IP is set manually, it may overlap with the IP range allocated by the router, resulting in abnormal IP release during shutdown and triggering the router to restart. 

II. check MAC address binding and filtering 

1. Broadband provider's MAC address binding 

-Some broadband operators will bind the MAC address of the first connected device. If the MAC address of the computer is bound, the router may restart abnormally because it detects that the bound device is offline. 

-Log in to the router management interface and find the MAC address cloning [removed_js] to clone the MAC address of the router's WAN port into the MAC address of the problem computer. 

2. MAC address filtering of routers 

-Check whether MAC address filtering is enabled on the router. If the computer is blacklisted or not on the white list, disconnecting may cause the router security mechanism to trigger a restart. 

-Go to "Wireless Settings" or "Security Settings" in the router management interface, turn off MAC address filtering or add the MAC address of this computer to the white list. 

III. power management and network wake-up function 

1. Turn off Wake-on-LAN of the computer. 

-The problem computer may have enabled the "wake-on-network" function, and still send signals through the network card after it is turned off, which interferes with the router power management. 

-Operating steps: 

-Enter the device manager of the computer → Expand the Network Adapter → Right-click the wireless network card → Properties → Power Management → Uncheck "Allow this device to wake the computer". 

2. Power management settings of the router 

-Some routers will adjust their power policies according to the status of connected devices. Check the options of "Energy Saving Mode" or "Power Optimization" in the router management interface, and try to turn off related functions. 

IV. Router firmware and hardware issues 

1. Update the router firmware 

-There may be compatibility issues with the older firmware. Visit the router brand official website to download the latest firmware and upgrade it. 

2. Power adapter and line inspection 

-Check the router power adapter for poor contact or unstable power supply, and try to replace the socket or power cord. 

-Observe whether the router indicator light flashes abnormally after the computer is turned off. If it is restarted frequently, it may be a hardware failure, and you need to contact the after-sales department. 

It is suggested that the first two items should be checked first, and if they are ineffective, try firmware update or hardware check again. If the above steps still cannot be solved, it is recommended to contact the router manufacturer's technical support or network service provider for further diagnosis.