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Setting Parameters 4

This chapter describes how to conﬁgure the hme driver parameters using the

ndd utility in the /etc/system ﬁle, or in the hme.conf ﬁle. Use the ndd

utility to conﬁgure parameters that are valid until you reboot the system.

To conﬁgure thehme driver parameters for all devices in the system so that the

parameter values are always in effect (even after rebooting the system), enter

the parameter values in the /etc/system ﬁle. When the system is rebooted,

it reads the /etc/system ﬁle and sets the parameter values in that ﬁle.

To set a particular parameter for a device in the system, set the parameter in

the hme.conf ﬁle in the /kernel/drv directory. The parameters set in the

hme.conf ﬁle have precedence over the parameters set in the /etc/system

ﬁle and override the parameters set in the /etc/system ﬁle. Setting

hme.conf parameter values are always in effect (even after rebooting the

system).

Parameter Options

You can set thehme device driver parameters in three ways (ndd,

/etc/system, and hme.conf), depending on your needs. To set parameters

that are valid until you reboot the system, use the ndd utility. Using ndd is a

good way to test parameter settings.

Contents

Main Page Page Page Contents Page Page Page Introduction to thehme Fast Ethernet Device Driver 1 Related Documentation Typographic Conventions Shell Prompts in Command Examples Ordering Sun Documents Sun Welcomes Your Comments Thehme Device Driver 2 Hardware Overview Operating Speeds and Modes Auto-Negotiation Internal Transceiver External Transceiver Page Parameter Denitions 3 This chapter describes the parameters and settings for the hme device driver. Driver Parameter Values and Denitions The following sections describe the hme driver parameters, which are listed in Table3-1. Page Dening the Current Status Inter-Packet Gap Parameters Dening an Additional Delay Before Transmitting a Packet Using lance_mode and ipg0 Table3-4 denes the lance_mode and ipg0 parameters. Operational Mode Parameters Table3-5 describes the operational mode parameters and their default values. Selecting the Internal or External Transceiver Dening the Number of Back-to-Back Packets To T ransmit Reporting Transceiver Capabilities Reporting the Link Partner Capabilities Table3-8 describes the read-only link partner capabilities. Page Page Setting Parameters 4 Parameter Options Setting Parameters Using ndd Identifying Device Instances To specify the device instance for the ndd utility Non-Interactive and Interactive Modes Using the ndd Utility in Non-Interactive Mode To modify a parameter value To display the value of a parameter Using the ndd Utility in Interactive Mode To modify a parameter value in interactive mode To list all the parameters supported by the hme driver Typendd /dev/hme \?. (Refer to Table 3-1 through 3-8 for parameter descriptions. ) Setting Forced Mode To select one of the ve local transceiver capabilities and set the mode to forced mode Auto-Negotiation Mode To set the mode to auto-negotiation Conguring TCP/IP for Maximum Performance Setting Parameters in the /etc/system File To set the ipg1 to 10 and ipg2 to 5 when you reboot Setting Parameters Using the hme.conf File To set ipg1 to 20 and ipg2 to 10 for the SUNW,hme device in SBus slot 0xe