I have an ESX 5.0 in my environment with 2 port intel 82599EB 10G nic. I am able to see these nics in ESX configuration.
I am trying to configure 1 port nic pass-thru to my win2008R2 machine and see the machine crashing. Everything will back to normal when i remove pass-thru PCI device from the VM. What am i missing? Please help!
Is any other ESXi component using the NIC that you want to pass-thru by any chance? Also, have you enabled VT-d in BIOS?
The thing I'd try is to disconnect the whole VM from network - removing its current network adapter and then adding the PCI Passthru device.
If that fails, the only other thing that comes to mind is enabling a straight Hardware Passthrough via VMware KB: Configuring VMDirectPath I/O pass-through devices on a VMware ESX or VMware ESXi host .