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Changing the MTU value
Let’s look at the methods for changing the MTU value on servers running Windows and Linux.
Windows
We will make the change using the CMD utility.
First, you need to open Command Prompt as Administrator. Then use the following command to view all existing network interfaces and their MTU values.
netsh interface ipv4 show subinterfaces
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You will get an output similar to this.
Next, change the MTU value with the following command:
netsh interface ipv4 set subinterface "Ethernet" mtu=1400 store=persistentHere is the result.
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Debian / Ubuntu
Run the following command to edit the network interfaces configuration; we will use Nano:
nano /etc/network/interfacesÂ
Then, at the end of the corresponding network interface configuration, add mtu 1400
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Press Ctrl + X, then Y to save the changes.
Run the following command to restart the networking service:
systemctl restart networkingÂ
