Support for NPIV (N_Port ID Virtualization) - the ability for a single fibre channel port to act multiple virtual ports by assigning multiple WWPNs, and therefore multiple N_Port_IDs to the physical N_Port. This allows for dedicated virtual HBAs to be assigned to individual vms. One of the main benefit is ability to provide storage Quality of Service QoS for individual virtual machines. NPIV requires the appropriate HW support (HBA and switches)