11 Configuring the NIC

This chapter describes how to configure the 3Com 10/100 Secure (3CR990B) NIC.

NOTE: Before you change the NIC configuration settings, contact your system administrator.

Default NIC Settings

The table below lists the configuration settings for the NIC. The default setting is shown in bold in the Settings column.

Option

Description

Settings

 

 

 

 

NetBoot ROM

Provides the ability to boot a computer over the network.

•

Disabled

 

Enables or disables the Netboot ROM (if a boot ROM is

•

Enabled

 

installed on the NIC).

 

 

 

 

 

 

Duplex

Determines if the NIC transmits data across the network

•

Auto Select

 

in both directions simultaneously (full-duplex) or in one

•

Full-Duplex

 

direction at a time (half-duplex).

•

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-Duplexsets 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-Duplexsets the NIC to operate in half-duplex

 

 

 

 

mode. You must also set the NIC Media Type setting.

 

 

 

 

Note: If you are running Windows 2003,

 

 

 

 

Windows XP, or 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:

 

 

 

1

In the Device Manager window, double-click

 

 

 

 

Network adapters.

 

 

 

2

Right-click the 3CR990B NIC and select Properties.

 

 

 

3

Select the Advanced tab.

 

 

 

4

Select Media Select in the property list, and make the

 

 

 

 

appropriate setting change in the Value list.

 

 

(continued)

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