3Com 3C996B-T manual Ndd Command, Configuring a NIC, Ndd /dev/bcme ?

Customizing the Driver Configuration

ndd Command

Driver configurations can also be temporarily changed with the ndd command. Any changes made with this command are temporary and will be lost when you reboot the system. To make permanent configuration changes, modify bcme.conf instead.

NOTE: Refer to the parameter descriptions as required in “Customizing the Driver Configuration” on page 80.

To display parameters that are configurable using ndd:

ndd /dev/bcme '?'

The system should return the following:

? (read only)

Instance (read and write) ForceSpeedDuplex (read and write) FlowControl (read and write) TxPacketDescCnt (read and write) RxStdDescCnt (read and write) RxCoalescingTicks (read and write) RxMaxCoalescedFrames (read and write) TxCoalescingTicks (read and write) TxMaxCoalescedFrames (read and write) RxCoalescingTicksDuringInt (read and write) RxMaxCoalescedFramesDuringInt (read and write) TxCoalescingTicksDuringInt (read and write) TxMaxCoalescedFramesDuringInt (read and write) StatsCoalescingTicks (read and write) DoubleCopyTxBufferSize (read and write)

Configuring a NIC

To configure a particular NIC, the parameter instance must be properly set. For example, to force a NIC of instance 1 to 100Mbps Full Duplex:

ndd -set /dev/bcme Instance 1

ndd -set /dev/bcme ForceSpeedDuplex 4

To query the current configuration of Flow Control of instance 3:

ndd -set /dev/bcme Instance 3 ndd -get /dev/bcme FlowControl

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