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List:       opensuse
Subject:    Re: [opensuse] configure jumbo frames
From:       Dave Feustel <dfeustel () mindspring ! com>
Date:       2009-04-23 15:03:07
Message-ID: 20090423150307.721AE8A908 () mx2 ! suse ! de
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On Thu, Apr 23, 2009 at 03:24:29PM +0200, Per Jessen wrote:
> Dave Feustel wrote:
> 
> > F9 and Suse are running on different versions of MSI K9N motherboards
> > (v1,v3) with builtin 1G nics. The v3 motherboard has a dual processor.
> > 
> > The Netgear card is plugged into a 10-year-old Dell.
> 
> I suspect what you have is this:
> 
> 1) MSI K9N v1 - NICs support jumbo frames
> 2) MSI K9N v3 - NICs do not support jumbo frames

The v3 motherboard has a Realtek RTL8111b nic chip.
I found the data sheet (RTL8111B_8168B_Registers_DataSheet_1.0.pdf)
and the Jumbo frame support goes to 7552 bytes. Why Suse doesn't
support the Jumbo setting is a mystery.

> 3) Netgear - does not support jumbo frames

Netgear GA311 supports jumbo frames to 7500.
http://kb.netgear.com/app/answers/detail/a_id/222

Netgear strongly advises setting jumbo frames on all adapters to the
same value.
 
> I can't think of a reason why there would be such a difference between
> your MSI boards, so I could be way off here.
> 
> 
> /Per
> 
> 
> -- 
> Per Jessen, Zürich (16.3°C)
> 
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