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7Configuring the NIC
This chapter describes how to configure the NIC.
Default NIC Settings
The table below lists the configuration settings for the NIC. The default setting is shown in
uppercase in the Settings column.
NOTE: Before you change the NIC configuration settings, contact your system
administrator.
Option Description Settings
NetBoot ROM Provides the ability to boot a PC over the network. Enables or
disables the Netboot ROM (if a boot ROM is installed on the NIC).
■DISABLED
■Enabled
Duplex Determines if the NIC transmits data across the network in both
directions simultaneously (full-duplex) or in one direction at a
time (half-duplex).
■Auto Select allows the NIC to automatically connect at the
duplex mode of the connected hub or switch. When you
select this setting, the Media Type is automatically set to
Auto Select.
■Full-Duplex sets the NIC to operate in full-duplex mode. To
use this setting, the switch that you are connected to must
support full-duplex. You must also manually set the NIC
Media Type setting.
■Half-Duplex sets the NIC to operate in half-duplex mode. You
must also set the NIC Media Type setting.
Note: If you are running Windows 2000, changes made to the
Duplex setting though the 3Com NIC Diagnostics are not
reflected in the registry unless you also change the Media Select
property setting in Windows 2000:
1In the Device Manager window, double-click Network
adapters.
2Right-click the 3C990B NIC and select Properties.
3Select the Advanced tab.
4Select Media Select in the property list, and make the
appropriate setting change in the Value list.
■AUTO
SELECT
■Full-Duplex
■Half-Duplex
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