02 Jun 2021

How to speed up your Wi-Fi and Ethernet connection?

One of the key features which decide how fast is your internet connection is the size of the MTU. In computer networking, the maximum transmission unit (MTU) is the size of the largest protocol data unit (PDU) that can be communicated in a single network layer transaction. To keep it simple you can adjust how big will be the packages which download and upload data from your computer or smartphone. This article will show you how to set the biggest MTU value possible to make your Internet connection way faster.

How to set a maximum MTU value of 1500:

  1. Open Windows Console as an administrator. Go to C:\Windows\System32 and cmd.exe file. Click with the right mouse button and select run as administrator. A Windows console file which you need to open to run commands
  2. Type: netsh interface ipv4 show subinterfaces and click enter. how to check MTU size in Windows console
  3. You will see a current MTU size.
  4. Run a speed test to check your current download and upload speed. A internet speed test run with MTU set to low value
  5. Go back to console and type: netsh int ipv4 set subinterface “Ethernet” mtu=1500 store=persistent and press enter. How to set maximum MTU size in Windows console
  6. You should see the Ok response, you could double-check if MTU is set to 1500 by running netsh interface ipv4 show subinterfaces command again. 
  7. Run a connection speed test once again with MTU set to 1500, you should see a significant speed increase. A internet speed test run with MTU set to maximum 1500
  8. If you are using a Wi-Fi network run the netsh interface ipv4 show subinterfaces command and find out what is the name of the Wi-Fi subinterface. how to change mtu size in wi-fi network
  9. Then run a command netsh int ipv4 set subinterface “Wi-Fi interface name” mtu=1500 store=persistent.
  10. Fantastic! Now both ethernet and Wi-Fi network MTU size is set to 1500, which should make your download and upload way faster.

By Maciej Korzeniowski on 02 Jun 2021


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