Optimizing MTU for gigabit

Posted on 2004-10-22
Last Modified: 2009-07-29
My suse9.1 server had two network connections:

1) Through my 10/100 switch (internet router) for access to the internet and other non-gig devices.

2) A gigabit crossover to my other main computer (a WinXP box).

I regularly transfer large files between the two and wondered if I could tune the gigabit link for better performance.

I tried adjusting the MTU on the linux side but it wont go higher than 1500. I have read that an mtu of 6000 would be better. I have tried using the YaST and ifconfig to change the mtu but both will not set higher that 1500. Is this possible to do and if so how? Also how to tune the XP box to the same.....

Da Proff
Question by:prof666
    LVL 5

    Accepted Solution

    As root from the command prompt

    ifconfig eth0 mtu 6000
    LVL 6

    Author Comment

    As I said that doesn't work. I get the error:

    SIOCSIFMTU: Invalid argument

    LVL 4

    Expert Comment

    Here's an idea, change your user name to something besides "prof666". Don't you know Gigabit  Ethernet doesn't support for satanic users yet...

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