[Beowulf] Mellanox ConnectX-3 MT27500 problems

[Hearns, John]

> I had to fix the cables to get 56Gbit/s link state. Without Mellanox FDR
> cables, I was only getting 40. So maybe check your cables. And if you're
> not 100% sure about your switch, try connecting the nodes back-to-back.

Have a look at this article:

http://www.theregister.co.uk/2013/01/02/mellanox_q4_revenue_warning/


Jorg, I would say you should ask your supplier about the cables.



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