Product : Citrix, XenServer/7.1, Standard
Feature : I/O Pass-Through, Networking, Network and Storage
Content Owner:  Roman Macek
Summary
SR-IOV
Details
XenServer 6.0 provided improved SR-IOV support for once specific card, Intels Niantic NIC, this card is not officialy supported for XenServer 7.x
Generally with SR-IOV VF, functions that require VM mobility like live migration, workload balancing, rolling pool upgrade, High Availability and Disaster Recovery are not possible.