Forum Discussion

Michaelyang's avatar
Michaelyang
Icon for Cirrostratus rankCirrostratus
May 02, 2023

About MTU

Hello,

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.

application delivery
  • shsingh's avatar
    shsingh
    Icon for Employee rankEmployee
    May 03, 2023

    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.