Linux MTU Change Size

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The MTU (Maximum Transmission Unit) is the maximum size of a packet that can be transmitted over a network. In Linux, you can change the MTU size to improve network performance or to work around network issues.

To change the MTU size in Linux, you can use the ifconfig or ip command. Here’s how to change the MTU size using the ifconfig command:

  1. Open a terminal window.
  2. Type the following command to display a list of network interfaces:
    ifconfig -a
  3. Find the interface for which you want to change the MTU size. Typically, the interface name starts with “eth” for Ethernet interfaces or “wlan” for wireless interfaces.
  4. Type the following command to change the MTU size for the interface:
    sudo ifconfig interface mtu new_mtu_size

    Replace “interface” with the name of the network interface, and “new_mtu_size” with the desired MTU size. For example, to change the MTU size to 1500 for the “eth0” interface, you would use the following command:

    sudo ifconfig eth0 mtu 1500
  5. Verify that the MTU size has been changed by typing the following command:
    ifconfig interface

    Replace “interface” with the name of the network interface. The output should include the new MTU size.

Note that changing the MTU size can affect network performance and may cause connectivity issues if the new size is too large for the network. It is recommended to test different MTU sizes to find the optimal value for your network configuration.

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