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Date:	Wed, 18 Jan 2012 09:13:51 -0800
From:	Jesse Brandeburg <>
To:	Jesper Dangaard Brouer <>
Cc:	"" 
	"Skidmore, Donald C" <>,
	"Waskiewicz Jr, Peter P" <>,
	"" <>,
	"Kirsher, Jeffrey T" <>
Subject: Re: ixgbe: Unsupported SFP+ modules on 10Gbit/s X520-DA2 NIC?

On Wed, 18 Jan 2012 03:30:58 -0800
Jesper Dangaard Brouer <> wrote:
> I just bought three 10Gbit/s X520-DA2 NICs (82599 based) for
> production usage, but I cannot get them to accept any of my 10Gbit/s
> SFP+ modules (4 different tried). According to the documentation I can
> find, the X520-DA2 NIC should support fiber optics SFP+ modules.
Hi Jesper, 

For X520 adapters, the documentation[1] states that which SFP+
adapters are/are not supported.  Direct attach cables are also


> The SFP+ modules does work in another 82599 based NIC in the same
> machine (engineering sample from PJ).

Sorry, can't help you with that one, those samples are different
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