About MTU

[Michaelyang]

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.

[shsingh]

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.