Sun Microsystems none manual Setting Parameters Using ndd, Identifying Device Instances

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To set parameters so they remain in effect after you reboot the system:

•Add the parameter values to /etc/system when you want to configure parameters for all devices in the system.

•Create the hme.conf file and add parameter values to hme.conf when you need to set a particular parameter for a device in the system.

If you want to test parameter settings, use the ndd utility described in Chapter

3.With ndd, the parameters are effective until you reboot the system. To make the parameter settings permanent, enter the values in /etc/system or hme.conf as described in this chapter.

Setting Parameters Using ndd

Use the ndd utility to configure parameters that are valid until you reboot the system. The ndd utility supports any networking driver, which implements the Data Link Provider Interface (DLPI).

The following sections describe how you can use the hme driver and the ndd utility to modify (with the -setoption) or display (without the -setoption) the parameters for each SUNW,hme device.

Identifying Device Instances

Before you use the ndd utility to get or set a parameter for the hme device, you must specify the device instance for the utility if there is more than one SUNW,hme device.

Note – If there is only one SUNW,hme device, the device is automatically chosen by the ndd utility.

▼To specify the device instance for the ndd utility

1.Check the /etc/path_to_inst file to identify the instance associated with a particular device.

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Platform Notes: The hme Fast Ethernet Device Driver—May 1996

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Contents PlatformNotesThehmeFast Ethernet Device Driver Please Recycle Page Page Contents Setting Parameters Contents Vii Viii Introduction to the hme Fast Ethernet Device Driver Related DocumentationTypographic Conventions Describes the typographic conventions used in this bookShell Prompts in Command Examples Ordering Sun DocumentsSun Welcomes Your Comments Hme Device Driver Hardware OverviewOperating Speeds and Modes Auto-NegotiationInternal Transceiver External TransceiverPlatform Notes The hme Fast Ethernet Device Driver-May Parameter Definitions Driver Parameter Values and DefinitionsRead only Local transceiver auto negotiation Capability Defining the Current Status Inter-Packet Gap ParametersLancemode Operational Mode Parameters Defines the lancemode and ipg0 parametersSelecting the Internal or External Transceiver Defining the Number of Back-to-Back Packets To Transmit Reporting Transceiver CapabilitiesReporting the Link Partner Capabilities Describes the read-only link partner capabilities= No 100Mbit/sec half-duplex transmission Platform Notes The hme Fast Ethernet Device Driver-May Setting Parameters Parameter OptionsIdentifying Device Instances Setting Parameters Using nddTo specify the device instance for the ndd utility Non-Interactive and Interactive Modes To modify a parameter valueTo modify a parameter value in interactive mode To display the value of a parameterTo list all the parameters supported by the hme driver Refer to -1 through 3-8 for parameter descriptionsSetting Forced Mode To set the mode to auto-negotiationSetting Parameters in the /etc/system File Configuring TCP/IP for Maximum PerformanceTo benchmark the TCP/IP throughput To set the TCP hiwater marks for best performanceTo set the ipg1 to 10 and ipg2 to 5 when you reboot Setting Parameters Using the hme.conf File Specify name=hme and class=sbus

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