The method that you use to test the Ethernet controller
depends on which operating system you are using. See the operating-system
documentation for information about Ethernet controllers, and see
the Ethernet controller device-driver readme file.
Try the following procedures:
- Make sure that the correct device drivers, which come with
the server are installed and that they are at the latest level.
- Make sure that the Ethernet cable is installed correctly.
- The cable must be securely attached at all connections. If the
cable is attached but the problem remains, try a different cable.
- If you set the Ethernet controller to operate at 100 Mbps, you
must use Category 5 cabling.
- If you directly connect two servers (without a hub), or if you
are not using a hub with X ports, use a crossover cable. To determine
whether a hub has an X port, check the port label. If the label contains
an X, the hub has an X port.
- Determine whether the hub supports auto-negotiation. If
it does not, try configuring the integrated Ethernet controller manually
to match the speed and duplex mode of the hub.
- Check the Ethernet controller LEDs on the rear panel of
the server. These LEDs indicate whether there is a problem with the
connector, cable, or hub.
- The Ethernet link status LED is lit when the Ethernet controller
receives a link pulse from the hub. If the LED is off, there might
be a defective connector or cable or a problem with the hub.
- The Ethernet transmit/receive activity LED is lit when the Ethernet
controller sends or receives data over the Ethernet network. If the
Ethernet transmit/receive activity is off, make sure that the hub
and network are operating and that the correct device drivers are
installed.
- Check the LAN activity LED on the rear of the server. The
LAN activity LED is lit when data is active on the Ethernet network.
If the LAN activity LED is off, make sure that the hub and network
are operating and that the correct device drivers are installed.
- Check for operating-system-specific causes of the problem.
- Make sure that the device drivers on the client and server
are using the same protocol.
If the Ethernet controller still cannot connect to the
network but the hardware appears to be working, the network administrator
must investigate other possible causes of the error.