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NDIS_NIC_SWITCH_PARAMETERS structure (ntddndis.h)

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The NDIS_NIC_SWITCH_PARAMETERS structure specifies the configuration parameters of a network adapter switch on the network adapter.

Syntax

typedef struct _NDIS_NIC_SWITCH_PARAMETERS {
  NDIS_OBJECT_HEADER           Header;
  ULONG                        Flags;
  NDIS_NIC_SWITCH_TYPE         SwitchType;
  NDIS_NIC_SWITCH_ID           SwitchId;
  NDIS_NIC_SWITCH_FRIENDLYNAME SwitchFriendlyName;
  ULONG                        NumVFs;
  ULONG                        NdisReserved1;
  ULONG                        NdisReserved2;
  ULONG                        NdisReserved3;
  ULONG                        NumQueuePairsForDefaultVPort;
} NDIS_NIC_SWITCH_PARAMETERS, *PNDIS_NIC_SWITCH_PARAMETERS;

Members

Header

The type, revision, and size of the NDIS_NIC_SWITCH_PARAMETERS structure. This member is formatted as an NDIS_OBJECT_HEADER structure.

The miniport driver must set the Type member of Header to NDIS_OBJECT_TYPE_DEFAULT. To specify the version of the NDIS_NIC_SWITCH_PARAMETERS structure, the driver must set the Revision member of Header to the following value:

NDIS_NIC_SWITCH_PARAMETERS_REVISION_1

Original version for NDIS 6.30 and later.

Set the Size member to NDIS_SIZEOF_NIC_SWITCH_PARAMETERS_REVISION_1.

Flags

A ULONG value that contains a bitwise OR of flags. The following flags are defined for this member.

NDIS_NIC_SWITCH_PARAMETERS_SWITCH_NAME_CHANGED

This flag specifies that the field that has been updated in the NDIS_NIC_SWITCH_PARAMETERS structure is the SwitchName member.

Note  This flag is valid only when this structure is used in an OID set request of OID_NIC_SWITCH_PARAMETERS.
 

SwitchType

An NDIS_NIC_SWITCH_TYPE enumeration value that specifies the type of the network adapter switch.

Note   Starting with Windows Server 2012, Windows only supports a switch type of NdisNicSwitchTypeExternal. An external switch specifies that the ports connected to this type of switch can access the external network through the physical port on the network adapter. The default virtual port (VPort) on the external switch provides external network connectivity to the virtualization stack that runs in the management operating system of the Hyper-V parent partition.
 

SwitchId

An NDIS_NIC_SWITCH_ID value that contains a switch identifier. The switch identifier is an integer between zero and the number of switches that the network adapter supports. An NDIS_DEFAULT_SWITCH_ID value indicates the default network adapter switch.

Note  Starting with Windows Server 2012, the single root I/O virtualization (SR-IOV) interface only supports the default network adapter switch on the network adapter. The value of this member must be set to NDIS_DEFAULT_SWITCH_ID.
 

SwitchFriendlyName

An NDIS_NIC_SWITCH_FRIENDLYNAME value that contains a description for the switch.

NumVFs

A ULONG value that specifies the number of PCI Express (PCIe) Virtual Functions (VFs) that are enabled on the network adapter. VFs are enabled on the adapter when virtualization is enabled through a call to NdisMEnableVirtualization.

Note  Before a VF can be attached to a Hyper-V child partition, resources must be allocated for it through an OID method request of OID_NIC_SWITCH_ALLOCATE_VF.
 

NdisReserved1

Reserved for NDIS.

NdisReserved2

Reserved for NDIS.

NdisReserved3

Reserved for NDIS.

NumQueuePairsForDefaultVPort

Remarks

The NDIS_NIC_SWITCH_PARAMETERS structure is used in OID method requests of OID_NIC_SWITCH_CREATE_SWITCH and OID_NIC_SWITCH_PARAMETERS. These OID requests set or query the configuration parameters of a network adapter switch.

For more information about the SR-IOV interface, see Overview of Single Root I/O Virtualization (SR-IOV).

Requirements

Requirement Value
Minimum supported client Supported in NDIS 6.30 and later.
Header ntddndis.h (include Ndis.h)

See also

NDIS_OBJECT_HEADER

NdisMEnableVirtualization

OID_NIC_SWITCH_ALLOCATE_VF

OID_NIC_SWITCH_CREATE_SWITCH

OID_NIC_SWITCH_PARAMETERS