Javi,
In my case, the switch doesn't matter. One the server that is working, I can plug into D-Link, Dell, Trendnet, TP-Link... all without issue. On the server where the NICs don't work, I run exactly the same tasks and nothing works. In fact, the left NIC light will light green but the right NIC light never comes on.
As the behavior happens on all three nodes (of which 1 has Hyper-V Server 2012 R2 installed, 1 has Windows Server 2008 R2 installed, and the last node has nothing installed), I'm almost certain it is the BIOS. Also, I do not use BMC or IPMI, so I'm not sure what I could do to disable them and what impact it would have.
All I want is a fully functional, fully operational node where all of the hardware works. I can take it from there.