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DOS/V Power Report 1998 October
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VPR9810B.BIN
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L101V109
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INFO
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GENERAL
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DUPLEX.TXT
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1997-07-16
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Duplex support
v1.10
Duplexing is a performance option that lets you choose how
the adapter sends and receives packets over the network.
PRO/100+ TX adapter duplex choices:
-----------------------------------
Auto. 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.
Half duplex. The adapter performs one operation at a time
(because send and receive lines are shared); it either sends
or receives.
Configuring for full-duplex
===========================
If you have an auto-negotiating hub (an NWay* hub), the
Intel PRO/100+ TX PCI 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.
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/100+ TX 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 3.51
----------------
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.
4 Set Duplex Mode to Full.
5 Click OK until prompted to restart. Restart Windows NT.
Windows* NT 4.0
---------------
1 Double-click the Network control panel icon in the
Control Panel.
2 Go to the Adapters tab and click Properties.
3 Select an adapter from the list and click Settings.
4 Select a duplex mode and click OK.
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.
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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