Mailinglist Archive: opensuse (2008 mails)

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Re: [opensuse] configure jumbo frames
  • From: Dave Feustel <dfeustel@xxxxxxxxxxxxxx>
  • Date: Thu, 23 Apr 2009 18:13:27 +0200 (CEST)
  • Message-id: <20090423161327.375D2889EE@xxxxxxxxxxx>
On Thu, Apr 23, 2009 at 05:38:34PM +0200, Per Jessen wrote:
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).

That worked! Thanks!

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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