IBM 847661U Hardware Maintenance Manual - Page 48

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" on page 38. For an illustration of the Ethernet activity light location on the server, see "Status indicators" on page 82. 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)" on page 53 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)" on page 53 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. 40 Netfinity Server HMM