I have a new OES2 server on re-purposed hardware (Dell PE1950) with an Intel
X520-DA2 (2 port 82599EB based direct attached 10 gig network adapter). It
is attached to a HP Procurve switch (5412zl) by an HP 7 meter direct attache
SFP + cable.

I have not been able to get any network traffic to go across the wire.

Has anyone else set up 10 Gig networking (especially with this type of Intel
card)? What should I look at to get it working?

Is it the driver (I downloaded the latest from Intel and compiled the kernel

Is it the hardware on the server side?

Is it the cable? (HP insists on HP direct attach cables, Intel on Intel

Is it the Switch or the configuration of the switch? (The switch wants to
auto-negotiate, the driver does not. I also have two VMware hosts with this
card and they cannot communicate either.)