#Freessm usb virtual port driver#

Queue pairs for nondefault VPorts are allocated and assigned when the VPort is created through the OID_NIC_SWITCH_CREATE_VPORT request. The default queue pair on the network adapter is reserved for use by the default VPort. Note After a VPort becomes operational, it can only become nonoperational when it is deleted through an OID request of OID_NIC_SWITCH_DELETE_VPORT.Д®ach VPort has one or more hardware queue pairs associated with it for receiving and transmitting packets.

These VPorts are nonoperational when created and can become operational through an OID set request of OID_NIC_SWITCH_VPORT_PARAMETERS. One or more nondefault VPorts can also be created and attached to the PF. Once attached, the default is in an operational state. Only one nondefault VPort can be attached to a VF. Nondefault VPorts are created through OID method requests of OID_NIC_SWITCH_CREATE_VPORT. The default VPort is always attached to the PF and is always in an operational state.

#Freessm usb virtual port driver#

When the PF miniport driver handles an object identifier (OID) method request of OID_NIC_SWITCH_CREATE_SWITCH, it creates the NIC switch and the default VPort for that switch. The default VPort has the VPortId of NDIS_DEFAULT_VPORT_ID. A default VPort always exists on the default NIC switch and can never be deleted. This provides virtualized access to the underlying physical network interface.Д®ach VPort has a unique identifier ( VPortId) that is unique for the NIC switch on the network adapter. The NIC switch bridges network traffic from the physical port to one or more VPorts. The PF is attached to the Hyper-V parent partition and is exposed as a virtual network adapter in the management operating system that runs in that partition.ДЄ VF is attached to the Hyper-V child partition and is exposed as a virtual network adapter in the guest operating system that runs in that partition. One or more internal VPorts which are connected to the PCI Express Physical Function (PF) or virtual functions (VFs). One external physical port for connectivity to the external physical network. Each NIC switch has the following ports for network connectivity: A virtual port (VPort) is data object that represents an internal port on the NIC switch of a network adapter that supports single root I/O virtualization (SR-IOV).