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List:       opensuse
Subject:    Re: [opensuse] configure jumbo frames
From:       Per Jessen <per () opensuse ! org>
Date:       2009-04-23 15:38:34
Message-ID: gsq21q$q6q$1 () saturn ! local ! net
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Dave Feustel wrote:

> 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.

According to the kernel source, the latest driver version supports
only "baby" jumbo frames, size <= 7200.  (assuming the driver is
r8169).

>> 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.

Yeah :-)


/Per


-- 
Per Jessen, Zürich (13.4 °C)

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