I've been looking and all my searching hasn't bared any fruit... yet.
I am trying to see if there is any VCenter API I can to get the physical interface statistics or even just interface status from the host ESXi servers?
Please see my response in this thread https://communities.vmware.com/t5/VMware-vCenter-Discussions/Question-about-DirectPath-I-O-vCenter-REST-APIs/m-p/2981065/highlight/true#M48904 which applies to the question here as well.