IBM 847691U Hardware Maintenance Manual - Page 46

Configuring the Ethernet controller, The 10BASE-T Ethernet and the 100BASE-TX

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Configuring the Ethernet controller The Netfinity 3000 server comes with an Ethernet controller on the system board. The Ethernet controller provides 10BASE-T and 100BASE-TX support through the RJ-45 connector on the back of the server. When you connect the server to the network, the Ethernet controller automatically detects the data-transfer rate (10 Mbps or 100 Mbps) on the network and then sets the controller to operate at the appropriate rate. That is, the Ethernet controller will adjust to the network data rate, whether the data rate is standard Ethernet (10BASE-T), Fast Ethernet (100BASE-TX), half duplex (HDX), or full duplex (FDX). This process is also known as auto-negotiation. This auto-negotiation occurs without requiring software intervention. The controller supports half-duplex (HDX) and full-duplex (FDX) modes at both speeds. However, auto-negotiation works only if the hub or switch to which the server is connected also supports auto-negotiation. If the hub or switch does not support auto-negotiation, the speed (10 Mbps or 100 Mbps) will still be detected correctly, but half-duplex mode will always be selected. A full-duplex switch that does not support auto-negotiation will not attach to the Netfinity 3000 server in full-duplex mode. In this case, if you want the network to operate in full-duplex mode, you must manually override the settings to obtain a full-duplex connection. To do this, the server must have a device driver that supports manual overrides. Use ServerGuide to install this device driver. Refer to the ServerGuide package for instructions on installing device drivers. ServerGuide includes IBM Update Connector, which keeps the BIOS and device drivers current. Verify that you have installed the appropriate device driver. Also, refer to the Ethernet documentation for additional information on operating modes, manual overrides, and device drivers. Attention The 10BASE-T Ethernet and the 100BASE-TX Fast Ethernet cabling in the network must be Category 5 to meet various standards, including electromagnetic compatibility. You must install a device driver to enable the operating system to address the Ethernet controller. Use ServerGuide to install this device driver. Refer to the ServerGuide package for instructions on installing device drivers. Fast Ethernet operates at a data rate of up to 100 Mbps. However, except for the different operating speeds, Fast Ethernet and standard Ethernet are structurally identical. Most applications and protocols that are currently installed on a standard Ethernet system can be seamlessly migrated to a Fast Ethernet system. Because of the 38 Netfinity Server HMM

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Configuring the Ethernet controller
The Netfinity 3000 server comes with an Ethernet
controller on the system board.
The Ethernet controller
provides 10BASE-T and 100BASE-TX support through the
RJ-45 connector on the back of the server.
When you
connect the server to the network, the Ethernet controller
automatically detects the data-transfer rate (10
Mbps or
100 Mbps) on the network and then sets the controller to
operate at the appropriate rate.
That is, the Ethernet
controller will adjust to the network data rate, whether the
data rate is standard Ethernet (10BASE-T), Fast Ethernet
(100BASE-TX), half duplex (HDX), or full duplex (FDX).
This process is also known as auto-negotiation.
This
auto-negotiation occurs without requiring software
intervention.
The controller supports half-duplex (HDX)
and full-duplex (FDX) modes at both speeds.
However, auto-negotiation works only if the hub or switch
to which the server is connected also supports
auto-negotiation.
If the hub or switch does not support
auto-negotiation, the speed (10 Mbps or 100 Mbps) will still
be detected correctly, but half-duplex mode will always be
selected.
A full-duplex switch that does not support
auto-negotiation will not attach to the Netfinity 3000 server
in full-duplex mode.
In this case, if you want the network
to operate in full-duplex mode, you must manually override
the settings to obtain a full-duplex connection.
To do this,
the server must have a device driver that supports manual
overrides.
Use ServerGuide to install this device driver.
Refer to the ServerGuide package for instructions on
installing device drivers.
ServerGuide includes IBM
Update Connector, which keeps the BIOS and device
drivers current.
Verify that you have installed the
appropriate device driver.
Also, refer to the Ethernet
documentation for additional information on operating
modes, manual overrides, and device drivers.
Attention
±
The 10BASE-T Ethernet and the 100BASE-TX
Fast Ethernet cabling in the network must be
Category 5 to meet various standards, including
electromagnetic compatibility.
±
You must install a device driver to enable the
operating system to address the Ethernet
controller.
Use ServerGuide to install this device
driver.
Refer to the ServerGuide package for
instructions on installing device drivers.
Fast Ethernet operates at a data rate of up to 100 Mbps.
However, except for the different operating speeds, Fast
Ethernet and standard Ethernet are structurally identical.
Most applications and protocols that are currently installed
on a standard Ethernet system can be seamlessly
migrated to a Fast Ethernet system.
Because of the
38
Netfinity Server HMM