How to set MTU size to 100 on Windows 10

Question

How to set MTU size to 100 on Windows 10

liujia 6

I met a problem, a hosting Dell system(Product:"0K8Y0N". Installed Windows 10 or Windows Server 2019 to test) with Intel I210 gigabit network adapter can not revice/process Ethernet frame which bigger than 126 bytes. For example, ping ip-address -l 84 is okay, but ping ip-address -l 85 is timeout. And I can not RDP to Dell system, because TLS connection package is bigger than 126 bytes too.

I tried to setup a proxy server which installed Debian, set mtu to 112 on Debian. Then I can RDP to Dell system via Debian's SSH tunnel.

Can I set MTU size to 112 for Windows 10(Windows Server 2019)? I tried, but failed.

C:\Windows\system32>netsh interface ipv4 set subinterface "Ethernet" mtu=352
Ok.


C:\Windows\system32>netsh interface ipv4 set subinterface "Ethernet" mtu=100
The parameter is incorrect.

Looks like Windows do not allow MTU size smaller than 352 bytes: https://support.microsoft.com/en-us/topic/packet-loss-occurs-when-mtu-is-below-576-and-pmtu-discovery-is-enabled-in-windows-e7a54c21-6202-9788-fb24-99530c0e9d64

Thank you.

7adhu_1 0 Reputation points

2024-03-15T17:20:12.57+00:00

hey man for me when i typed it in my laptop it says "The filename, directory name, or volume label syntax is incorrect" please help!

2 answers

Your answer

7adhu_1 0 Reputation points

2024-03-15T17:20:12.57+00:00

hey man for me when i typed it in my laptop it says "The filename, directory name, or volume label syntax is incorrect" please help!

Answer 1

Limitless Technology 40,101

Hello @liujia ,

Thank you for your question.

Please follow these steps, it will help you:

Open the command Prompt window and 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=1472 store=persistent”.
You should replace Local Area Connection with the name that appeared in the “Interface” column from steps previous steps
Press Enter.
Type “netsh interface ipv4 show subinterface” to check the result.

If the reply was helpful, please don't forget to upvote or accept as answer.

Gio Gogilashvili 0 Reputation points

2023-02-28T13:03:18.1366667+00:00

Hi, when I try to change the mtu from the cmd, it says element not found. I do not understand why? Can you help me? I type it correctly but it can not find the object, maybe cmd code is not correct.

Answer 2

Leon Laude 86,116

Hi @liujia ,

The paremeter is incorrect because your MTU value of 100 is probably lower than the minimum MTU, to check your current minimum MTU run the following command:
netsh interface ip show global. I believe the minimum MTU nowadays is 576 by default.

----------

If the reply was helpful please don't forget to upvote and/or accept as answer, thank you!

Best regards,
Leon

liujia 6 Reputation points

2021-09-01T10:51:23.677+00:00

Dear Leon,

Thank for your answer. Yes, I can set MTU to 572, but I need to set 112 or 100. Do you know how to set MTU to 100 on Windows 10? Debian OS can run 'ip link set enp0s3 mtu 100' to get that. But on Windows how to do the same thing?
Leon Laude 86,116 Reputation points

2021-09-01T14:09:40.303+00:00

I'm afraid that won't be possible, as you can see the minimum accepted MTU appears to be 352:

If the reply was helpful please don't forget to upvote and/or accept as answer, thank you!
Mike 1 Reputation point

2022-08-07T02:40:52.047+00:00

i have my minimum mtu set to 554 as higher would say a 100% loss of packet data. i believe i had a lower mtu of 550 but produced a slightly longer ping time to the same address as my above 554 mtu setting at ping www.google.com.

Share via

How to set MTU size to 100 on Windows 10

2 answers

Your answer