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wilson

Member

Registered: 2008-02-26

Posts: 13

e1000e mtu limitation

I am trying to set my network card's mtu to 9000

ifconfig eth0 mtu 9000

However, it comes back with the error

SIOCSIFMTU: Invalid argument

After playing around with it a little bit, I've found that the threshold is 4078 (ie,

ifconfig eth0 mtu 4078

works,

ifconfig eth0 mtu 4079

doesn't. Kernel is 2.6.35.

Is there a reason that I can't set my mtu above 4078?

fukawi2

Ex-Administratorino

From: .vic.au

Registered: 2007-09-28

Posts: 6,226

Website

Re: e1000e mtu limitation

I'm guessing the card itself doesn't support an MTU higher than that, even though it's using the e1000e driver that does. What is the actual NIC make/model?

Edit: 4078 + 18 bytes frame size = 4096. Definitely sounds like the NIC's limit.

Last edited by fukawi2 (2010-11-05 04:31:40)

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