DUPLEX.TXT Driver File Contents (d2lilan.exe)

   Duplex support
                                                            v1.09

EtherExpress(TM) PRO/100B - TX and T4 Adapters
===============================================================

Duplexing is a performance option that lets you choose how the
adapter sends and receives packets over the network.

PRO/100B TX adapter duplex choices:
-----------------------------------

   Auto (TX adapter only). The TX adapter negotiates with the
   full duplex switching hub to send and receive packets at the
   highest rate. The hub must support auto-negotiation. If the
   hub does not support auto-negotiation, the adapter defaults to
   half duplex.

   Full duplex (requires full-duplex switching hub). The adapter
   sends and receives packets simultaneously by using a different
   wire to perform each function. This feature can improve
   adapter performance by eliminating collisions. Note that the
   PRO/100 T4 adapter supports full duplex at 10 Mbps only.

   Half duplex. The adapter performs one operation at a time
   (because send and receive lines are shared); it either sends
   or receives.

PRO/100B T4 adapter duplex choices:
-----------------------------------

   Full duplex (requires 10 Mpbs 10BASE-T full-duplex switching
   hub). The T4 adapter sends and receives packets simultaneously
   by using a different wire to perform each function. This
   feature can improve adapter performance by eliminating
   collisions. Note that the PRO/100 T4 adapter supports full
   duplex at 10 Mbps only, and requires a 10BASE-T switching hub.

   Half duplex. The adapter performs one operation at a time
   (because send and receive lines are shared); it either sends
   or receives.

Warning:  Incorrectly forcing a specific duplex mode may result
in poor performance. Consult your LAN administrator before
forcing a duplex mode or if you don't know what kind of hub
you're attached to.

Full duplex mode is available using the following configurations:

- EtherExpress PRO/100B TX adapter (10 or 100 Mbps w/ 100BASE-TX
hub)

- EtherExpress PRO/100B T4 adapter (10 Mbps only w/ 10BASE-T hub)


Configuring for full-duplex
===========================

PRO/100B TX adapter: if you have an auto-negotiating hub (an
NWay* hub), the Intel PRO/100B PCI TX adapter will automatically
match the duplex setting at the hub. If you don't have an auto-
negotiating hub, you'll need to manually configure the adapter
for full duplex support.

PRO/100B T4 adapter: the T4 adapter does not support auto-
negotiation.

PRO/100B TX and T4: configuration is specific to the driver
you're loading for your network operating system (NOS). See the
sections for your NOS below.

Note: If you're using the EtherExpress PRO/100B TX or T4 adapter,
      you must set the Speed when configuring for full-duplex
      support. Don't leave the Speed set to Auto.

To set up the duplex mode, refer to the section below that
corresponds to your operating system. For example, if you are
running Windows NT on a Novell network, choose the Windows NT
method below.

Note that performance may suffer if your hub is not full duplex
and you configure the adapter to full duplex. Leave the adapter
on half duplex if you are not sure what type of hub you are
connected to.


DOS/ODI clients
---------------

Edit the NET.CFG file. Add the SPEED and FORCEDUPLEX parameters
under the link driver section. For example
   
   Link Driver E100BODI
       SPEED 100 (or 10 for 10 Mbps operation)
       FORCEDUPLEX 2


Windows* NT
------------

Use the PRO Adapter setup program:

1  Double-click the PROSet icon in the Control Panel.

2  Click Change.

3  Set Speed on PRO/100 TX to 10 or 100. On PRO/100 T4 adapter,
   set to 10.

4  Set Duplex Mode to Full.

5  Click OK until prompted to restart. Restart Windows NT.




Windows 95
----------

Use the PRO Adapter setup program:

1  Double-click the PROSet icon in the Control Panel.

2  Click Change.

3  Set Speed on PRO/100 TX to 10 or 100. On PRO/100 T4 adapter,
   set to 10.

4  Set Duplex Mode to Full.

5  Click OK until prompted to restart. Restart Windows 95.




Other NDIS 2.x based clients
----------------------------

Edit the PROTOCOL.INI file. Add the FORCEDUPLEX and SPEED
parameters to the E100B section. For example:
   
   [E100B_NIF]          ; varies depending on your NOS
   SPEED = 100          ; or 10 for 10 Mbps operation
   FORCEDUPLEX = 2



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