The intermediate driver obtains the device name from the UpperBindings registry key.įor an n-to-one MUX intermediate driver that layers multiple virtual miniports over a single physical NIC, there must be a device name for every virtual miniport. Set the DriverInstance parameter of NdisIMInitializeDeviceInstanceEx to the device name for the virtual miniport being initialized. There does not have to be a one-to-one relationship between virtual miniports and open adapters. Note An intermediate driver is not required to call NdisIMInitializeDeviceInstanceEx when it opens an underlying miniport adapter. An intermediate driver calls NdisIMInitializeDeviceInstanceEx from its ProtocolBindAdapterEx function one or more times to request initialization of one or more virtual miniports.
An intermediate driver initializes its virtual miniports after it has successfully opened an underlying miniport adapter and is ready to accept requests and sends on its virtual miniports.
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