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4.6
Select Duplex Mode (optional)
Duplexing is a performance option that lets you choose how the
adapter sends and receives data packets over the network. The
PRO/100 TX adapter can operate at full duplex only when connected
to a full duplex 10BASE-T or 100BASE-TX switching hub. To
summarize:
Auto (requires a full duplex switching hub with auto-negotiation
capability). The adapter negotiates with the hub to send and
receive packets at the highest rate.
Full duplex (requires a full duplex switching hub). The adapter
can send and receive packets at the same time. This mode can
increase adapter performance capability.
Half duplex. The adapter performs one operation at a time; it
either sends or receives. Half duplex is the default mode.
Note that if your hub is running at 100 Mbps and half duplex, your
potential bandwidth is higher than if you run at 10 Mbps and full
duplex.
4.6.1
Configuring for full duplex
If your hub supports auto-negotiation with the N-way standard, duplex
configuratoin is automatic and no action is required on your part.
However, few hubs in the current installed base support auto-
negotiation. Check with your network system administrator to verify.
Most installations will require manual configuration for changing from
half duplex to full duplex mode.
To configure for full duplex, first verify that your adapter is connected
to a full duplex, 10BASE-T (10 Mbps only) or 100BASE-TX (10 or 100
Mbps) switching hub. Configuring the PRO/100 TX PCI adapter for
full duplex is a two-step process: the Speed setting on your adapter
must be changed from Auto to 10 or 100, and the Duplex setting also
must be changed to full duplex. However, configuration is specific to
the driver you're loading for your network operating system (NOS), as
shown in the sections below.
LAN Information
4-13
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Troubleshooting
