Changing Windows MTU

Sometimes you may have a reason to change the MTU on your windows computer. Here is how.

1. Open Command Prompt as Administrator

1. Click start
2. Type cmd
3. On the Right hand side, click 'Run as administrator'

• 
  Open command prompt, as Administrator

2. Show the current MTU and the interface name

1. Enter in the command: netsh interface ipv4 show subinterfaces
2. Make a note of the existing MTU (probably 1500)
3. Make a note of the interface name - eg Ethernet

• 
  Show the current MTU and interface name

3. Change the MTU for the interface

1. Enter the command: netsh
2. Then: interface

Then: ipv4 Then: set subinterface "Ethernet" mtu=1320 Then: exit

• 
  Changing the MTU to 1320

5. Check the MTU

1. Run the first command to show the Interface details again: netsh interface ipv4 show subinterfaces
2. It should now show 1320

6. Reverting back

1. restarting the computer should change the MTU back to default
2. Or, you can run the commands above, but set 1500 instead of 1320