Changing the MTU size in Windows Vista, 7 or 8 Sometimes a computer may struggle to reliably receive and transmit data – resulting in slow speeds or interrupted access to some sites and Internet services. Altering the MTU size can help resolve these problems. This guide shows you how. Open a Command Prompt in Administrator Mode:

Click the Windows button on the task bar. Click All Programs. Click Accessories. Right-click on Command Prompt and click Run as administrator. If prompted click the Allow button. Setting the MTU Size:

Once the Command Prompt window is open follow the steps below to change the MTU size:

Type netsh interface ipv4 show subinterface Press Enter. You will see a list of network interfaces. Type netsh interface ipv4 set subinterface “Local Area Connection” mtu=1400 store=persistent You should replace Local Area Connection with the name that appeared in the “Interface” column from steps 1-3. Press Enter. Restart you computer and then test again. If you still have problems after modifying the MTU repeat the above steps - replacing the numbers 1400 with 1430 – restart the computer and test again. If you still have problems refer to our Troubleshooting guides for further assistance.

changing_mtu.txt · Last modified: 2018/10/15 13:23 by drbohlav