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Document ID: DDSE-42DVG7

Netfinity 3000 - Trouble Shooting the 10/100 Mbps Ethernet Controller and Network Connection Problems

Applicable to: World-Wide

Troubleshooting the 10/100 Mbps Ethernet Controller:
Use the following information to help isolate problems that might occur with the 10/100 Mbps Ethernet controller.

Note For additional information about the Ethernet controller, such as configuration and auto-negotiation, see "Configuring the Ethernet Controller". For an illustration of the Ethernet activity light location on the server, see "Status Indicators".

Network Connection Problems: If the Ethernet controller cannot connect to the network, check the following:

1. Make sure that the cable is installed correctly.

The network cable must be securely attached at all connections. If the cable is attached but the problem persists, try a different cable.

If you use the integrated Ethernet controller, you must use Category 5 cabling. See "Specifications (Ethernet Cable)" for additional information about Ethernet cable requirements.

If you directly connect two workstations (without a hub), or if you are not using a hub with X ports, use a crossover cable. See "Specifications (Ethernet Cable)" for an illustration of a crossover cable.

Note 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.

2. Check the Ethernet activity light on the front of the server.

The Ethernet activity light comes on when the Ethernet controller sends or receives data over the Ethernet network.

Note This light is off when you run the diagnostic programs in the Configuration/Setup Utility program.

If the Ethernet activity light is off:
a. Make sure that the hub and network are operating, and that the correct device drivers are loaded.
b. There might be a defective Ethernet connector or cable, or a problem with the hub.
3. Make sure that you are using the correct device drivers that come with your server.
4. Check for operating system-specific causes for the problem.
5. Test the Ethernet controller or adapter.

How you test the Ethernet controller or adapter depends on which operating system you are using. Refer to your ServerGuide documentation for details about your operating system.

Diagnostic LEDs: The server contains two diagnostic LEDs (one green, and one amber) on the Ethernet connector that is located at the rear of the server.

- When the green LED is on, it indicates that the Ethernet controller or adapter is connected to a hub or switch and is receiving link pulses. If this LED is not on, check all connections at the controller or adapter and the hub. Make sure that the hub is transmitting at the correct speed, and that the drivers are loaded.

Also, make sure that you have the correct wiring configuration for the controller or adapter to the hub connection. Some hubs require a crossover cable rather than a straight-through cable.

Notes 1. This LED is also known as the Link OK light. 2. The green LED is on when you run the diagnostics loopback test without a cable attached to the controller or adapter.

- When the amber LED is on, it indicates that the Ethernet network is operating at 100 Mbps. When this LED is off, it indicates that the Ethernet network is operating at 10 Mbps.

Note The amber LED might remain lit if the link is broken during activity.

	Search Keywords
	Document Category	Networking
	Date Created	20-11-98
	Last Updated	23-11-98
	Revision Date	20-11-99
	Brand	IBM PC Server
	Product Family	Netfinity 3000
	Machine Type	8476
	Model	ALL
	TypeModel
	Retain Tip (if applicable)
	Reverse Doclinks and Admin Purposes