On Thu, 7 Jul 2011 07:25:41 -0700
Charles Wright <cpwri...@gmail.com> wrote:

> Hello,
> 
> I have a X520-DA ixgbe card with a Finisar FTLX8571D3BCL SFP+ module.

Charles, your X520-DA ixgbe adapter is configured in hardware to only
work with Direct Attach (DA) cables.  The X520 adapters (without the DA) 
are configured in hardware to work correctly with plug-in SFP modules,
and would be the ones that you want if you need SR/LR module support.

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