Why my LAN speed is slow?
Many reasons might have caused the slow LAN speed. It might be due to the following:
Bad internet connectionFaulty cablesA problem with the modem or routerProblem with Internet Service ProviderSlow DNS server
There might be some other reasons for the slow LAN. Mainly the above issues are reasons for the slow LAN in major instances. Let’s see how to fix them.
Fix Slow LAN speed on Windows 11/10 computer
A bad or slow LAN Ethernet speed on Windows 11 or Windows 10 can be fixed in the following ways: Let’s get into the details of each fix.
1] Check the internet connection
When you are experiencing a slow LAN on Windows, you first have to check if the internet is working fine on other devices. Check the speeds on other devices, restart the modem or router, and contact your ISP if you face any issues.
2] Update Network Drivers
An outdated or faulty network driver might also cause slow LAN speeds. You have to update Network drivers and check for Windows OS updates. It might automatically update the drivers to the latest versions, and your slow LAN speed issue will be fixed.
3] Change the DNS server
The Domain Name Server (DNS) on your PC might cause the issue. You have to change the DNS to other public servers like Google Public DNS, Cloudflare, or any other. It might fix the slow LAN speeds if a slow DNS server causes it.
4] Turn off VPN
If you use a VPN on your PC, you must turn it off to use the internet at full speed. Some VPNs have kill switches automatically enabled. It might cause the non-working of the internet on your PC. Please turn it off in the VPN settings. Read: Increase WiFi Speed Signal strength and coverage area.
5] Disable Large Send Offload
Sending large data chunks outside might be an issue before sorting the downloads on your LAN. You have to Disable Large Send Offload to stop sending large amounts of data. To do so, open Device Manager on your PC and click on Network Adapters. Then, double-click on your network adapter. Click on the Advanced tab and select Large Send Offload from the Property list. Then, please set it to Disabled.
6] Change Speed and Duplex Settings
The Speed and Duplex Settings on your PC negotiate with the hardware, resulting in speeds on your PC. You have to change them to a higher speed to resolve slow speed. In the Advanced options tab of your network adapter, select Speed/duplex Settings from the Property list. Set the value to the highest Mbps and Click OK.
7] Disable IPv6
Disabling IPv6 resolves many internet connection issues. It is a standard fix that helped many users. You need to disable IPv6 to increase the LAN speed. Check if it has solved the issue. If none of the above issues fixed the slow LAN, you might have to contact your Internet service provider.
How do I fix slow LAN Ethernet?
There are many ways to fix slow LAN Ethernet. You can fix it by changing DNS, disabling Large Send Offload, changing speed/duplex settings, updating network drivers, etc. If you are still experiencing slow speeds, it is possible that your router or modem is outdated and needs to be replaced. You can also try connecting your computer directly to the modem to see if that improves the speed. You may need to contact your ISP for further troubleshooting if you still have issues. You need to find the cause of the issue first and implement the fix that eliminates the cause. Related read: Fix IPv6 Connectivity, No network access error on Windows.
