How do I check my MTU on Windows?

Posted on by Muna Meyer

How do I check my MTU on Windows?

Ping Test to determine Optimal MTU Size on Router

  1. In Windows, go to Start and select Run.
  2. Type in cmd (Windows 2000/XP) or command (Windows 98/ME) into the Open: field.
  3. At the DOS prompt, type in ping www.yahoo.com -f -l 1492 and hit the Enter key:
  4. The results above indicate that the packet needs to be fragmented.

How do I find the MTU size in Windows 10?

All replies

  1. Type “netsh interface ipv4 show subinterface”.
  2. Press Enter.
  3. You will see a list of network interfaces.
  4. Type “netsh interface ipv4 set subinterface `Local Area Connection` mtu=1472 store=persistent”.
  5. Press Enter.
  6. Type “netsh interface ipv4 show subinterface” to check the result.

How can I check my current MTU?

The easiest way to check supported MTU sizes is ping – provided your routing nodes support echo requests/replies. E.g. in Windows you can use ping -f -l 1472 to check for 1500 byte MTU all the way to the .

How do I change my registry MTU?

To set the MTU size for the network interface, follow these steps:

  1. Click Start, click Run, type regedit, and then click OK.
  2. Locate the following key in the registry:
  3. On the Edit menu, point to New, and then click DWORD Value.
  4. Type MTU, and then press ENTER.
  5. On the Edit menu, click Modify.

What is the best MTU size?

28 bytes – IP header and ICMP headers. 1460 + 28 = 1488 is the optimum MTU Setting.

What is MTU value?

Maximum transmission unit (MTU) determines the maximum payload size of a packet that is sent. The default standard value is 1500 bytes. However, you can increase the payload size of the packet, which allows you to send more data and increase the data transfer rates.

What should MTU size be?

As mentioned, the common value of MTU in the internet is 1500 bytes. As you can see in the figure above, the MTU is built from payload (also referred as data) and the TCP and the IP header, 20 bytes each.

Is it safe to change MTU size?

Larger packets are more likely to suffer from delays and even corruption. A greater MTU size can also increase latency, whereas setting it to a smaller number can help improve the overall latency. Therefore, you should change the MTU size to be the maximum it can be without any detrimental effects.