Support representing SR-IOV NIC in VM

[hanbing0715]

Hello everyone,

As we know SR-IOV (also known as PCIe passthrough) is a popular technology for VM, especially for high performance networking, but currently NetBox can't present relations between PF on Host and VF in Guest.

I have an idea about modeling relation about PF and VF. First, NetBox current support create Interface with a parent Interface, but have a limit that parent Interface must be "Virtual" type. So in Host side can modeling PF as parent Interface (after remove limit that parent Interface must be virtual) and modeling VF as "child" Interface.

The next problem is how to present VF in VM. My suggestion is use a cable (maybe a new type of Cable) to connect VF inside VM (maybe parent Interface) and VF on Host (this must be a "child" Interface).

Is a interesting feature and good idea?