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Can we configure different MTU for sub interfaces(f0/0.1 and f0/0.2) under the same main interface? How does routers behave in this scenario?

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Question added by Mohammed Abdul Rahman
Date Posted: 2016/09/09
AHMED SIFELESALM SALIH  AHMED
by AHMED SIFELESALM SALIH AHMED , Network Engineer , Applied Technologies

not sure if you are talking about a router on a stick!

Ajay Kumar K A
by Ajay Kumar K A , Sr IT System Administrator , Ace Cranes & Engineering FZ LLC

Yes, you can configure different MTU on different subinterfaces. Router checks the MTU from the main interface.

Ilyas Mohammed
by Ilyas Mohammed , Sr Technical Analyst (IT Infrastructure Engineer)

Yes, you can configure different MTU on different subinterfaces. Router checks the MTU from the main interface. If the main interface MTU is lower value than the MTU on the subinterface, the router changes the MTU on the main interface to match with the subinterface.

Methaq Saeed Ali saif
by Methaq Saeed Ali saif , Project Supervisor , STC

Yes we can, the router will be behave as if each sub interface independent from each other 

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