mtu

Igor Gueths igueths at yahoo.com
Tue Mar 26 14:28:26 EST 2002


Hi Kerry. Wouldn't increasing the mtu value decrease over head? Because I am trying to raise the value to 10000 or something, not lower it. 
----- Original Message ----- 
From: Kerry Hoath <kerry at gotss.net>
To: <speakup at braille.uwo.ca>
Sent: Tuesday, March 26, 2002 6:46 AM
Subject: Re: mtu


> I can't see why you'd want to do this on an ethernet
> interface anyway since ethernet is tuned to handle mtu of 1500 and reducing it
> is just going to increase wire overhead and do nothing more.
> MTU discovery means that if something else has a lower mtu this will be communicated back
> to the kernel and th e networking stack will take care of it.
> Well just because I don't know why you want to do this doesn't mean it can't be done.
> Once the route to the interface is in place you need to del the route and re-add it
> with the mtu value so for example:
> route del 192.168.1.0
> route add -net 192.168.1.0 dev eth0 mtu 768
> and I think the ip tools can do this too
> try ip route help 
> and
> ip nei help
> 
> Regards, Kerry.
> On Mon, Mar 25, 2002 at 08:19:13PM -0500, Igor Gueths wrote:
> > Hi. Has anyone successfully changed their mtu value on their network interface? I am unable to do this via /etc/network/interfaces. I put mtu 1000 after the line where it says iface eth0 inet dhcp. I restarted inetd and init, and the value hasn't changed. Does anyone know how to go about doing this? Thanks! 
> > 
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> Kerry Hoath:  kerry at gotss.net kerry at gotss.eu.org or  kerry at gotss.spice.net.au
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