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Michaelyang's avatar
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May 02, 2023

About MTU


Recently, I found that the MTU settings of the environment are inconsistent

VLAN MTU = 1500

DefaultRoute MTU = 9000


1. Which MTU is the final packet transmission applied to?
2. If I directly change the MTU of the VLAN to 9000, will there be any problem? (affect the service?)

Any Help is appreciate.

1 Reply

  • Hi Michaelyang 

    Typically you will not need to change the MTU, but the VLAN MTU is the one for frames leaving the device and onto external switching infrastructure.