netdev - Re: Yukon2 88E8056 card problem with switch?

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Message-ID: <4A0D4D3D.8030902@aei.mpg.de>
Date:	Fri, 15 May 2009 13:08:45 +0200
From:	Carsten Aulbert <carsten.aulbert@....mpg.de>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
CC:	netdev@...r.kernel.org
Subject: Re: Yukon2 88E8056 card problem with switch?

Hi again

Stephen Hemminger schrieb:
> 
> You are only seeing partial flow control. My recommendation would be to
> turn off flow control with:
>    ethtool -A eth0 autoneg off rx off tx off
> 
Tried that, did not help.

> 
> It works with other switches, so check cable and try another switch.
> 

I think I've overlooked something. Is it possible that said chip (or the
driver) has problems with Jumbo frames? Our usual setup for more than a
year now is that we run everything with MTU 9000 and thus I have not
looked into this before. I just did a full install with MTU 1500 and it
just worked.

Is there a known issue with Jumbo frames?

The same set-up (switch, cable, etc, works with an e1000 and Jumbo frames).

Cheers

CArsten

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