optional parameters for the driver can be supplied as command line arguments to the insmod command. commonly, these options are specified in a module configuration file: / etc/modules.conf or /etc/conf.modules. these parameters take the form:

    [parameter]=value[,value,...]

    where the multiple values for the same parameter are for multiple nics installed in the system. all the parameters are listed below.

    ■ line_speed

    selects the line speed of the link. this parameter is used together with full_duplex to select the speed and duplex setting of the link. the valid values are:

    0 autonegotiate (default)

    10 10 mbps

    100 100 mbps

    note that selecting 1000 mbps manually is invalid. 1000 mbps can only be achieved through autonegotiation.

    ■ full_duplex

    selects the duplexity of the link. this parameter is used together with line_speed to select the speed and duplex setting of the link. note that this parameter is ignored if line_speed is 0. the valid values are:

    0 half duplex

    1 full duplex (default)

    ■ rx_flow_control

    enables or disables receiving flow control (pause) frames. this parameter is used together with auto_flow_control. the valid values are:

    0 pause receive disabled (default)

    1 pause receive enabled if auto_flow_control is set to 0, or pause receive advertised if auto_flow_control is set to 1

    ■ tx_flow_control

    enables or disables transmitting flow control (pause) frames. this parameter is used together with auto_flow_control. the valid values are:

    0 pause transmit disabled (default)

    1 pause transmit enabled if auto_flow_control is set to 0, or pause transmit advertised if auto_flow_control is set to 1

    ■ auto_flow_control

    enables or disables auto-negotiation of flow control. this parameter is used together with rx_flow_control and tx_flow_control to determine the advertised flow control capability. the valid values are:

    0 flow control auto-negotiation disabled (default)

    1 flow control auto-negotiation enabled with capability specified in rx_flow_control

    and tx_flow_control (only valid if line_speed is set to 0)

    ■ mtu

    enables jumbo frames up to the specified mtu size. the valid range is from 1500 to 8184.