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When queried, the OID_DOT11_CHANNEL_AGILITY_PRESENT object identifier (OID) requests that the miniport driver return the value of the IEEE 802.11g dot11ChannelAgilityPresent management information base (MIB) object for the current PHY type on the 802.11 station.

This MIB object specifies whether the current PHY type supports channel agility. For more information about channel agility, refer to Clause 18 of the IEEE 802.11b-1999 standard and Clause 19 of the IEEE 802.11g-2003 standard.

The data type for OID_DOT11_CHANNEL_AGILITY_PRESENT is a BOOLEAN value. A value of TRUE indicates that the current PHY type supports channel agility.

The dot11ChannelAgilityPresent MIB object is only valid for the following PHY types:

  • High-Rate Direct-sequence spread spectrum (HRDSS) PHY.

  • Extended-rate PHY (ERP).

If the current PHY type is not set to dot11_phy_type_hrdsss or dot11_phy_type_erp, the miniport driver must fail the query request by returning NDIS_STATUS_INVALID_DATA from its MiniportOidRequest function.

If the miniport driver is operating in Extensible Station (ExtSTA) mode, the current PHY type is determined through the ExtSTA msDot11CurrentPhyID MIB object. This MIB object specifies the index of the current PHY type within the 802.11 station's list of supported PHY types. For more information about this MIB object, see OID_DOT11_CURRENT_PHY_ID.

Note  A Native 802.11 miniport driver that is designed to run on the Windows Vista or Windows Server 2008 operating systems must always reset this 802.11 MIB OID to its default value. This is the case regardless of the value of the bSetDefaultMIB member of the DOT11_RESET_REQUEST structure. This requirement applies to a miniport driver that, in a call to the NdisMSetMiniportAttributes function, sets MiniportAttributes -> Native_802_11_Attributes -> Header -> Revision to NDIS_MINIPORT_ADAPTER_802_11_ATTRIBUTES_REVISION_1.



Available in Windows Vista and later versions of the Windows operating systems.


Windot11.h (include Ndis.h)

See also

Native 802.11 MIB OIDs
Native 802.11 Wireless LAN OIDs



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