IBM xSeries 200 Hardware Maintenance Manual

Also see for xSeries 200: Hardware Maintenance Manual Hardware Maintenance Manual

Contents

If you set the Ethernet controller to operate at 100 MBps, you must use Category5 cabling.If you directly connect two workstations (without a hub), or if you are not usinga hub with X ports, use a crossover cable.Note: To determine whether a hub has an X port, check the port label. If thelabel contains an X, the hub has an X port.v Determine if the hub supports auto-negotiation. If not, try configuring theintegrated Ethernet controller manually to match the speed and duplex mode ofthe hub.v Check the LAN activity light (if available) on the front of the server. The LANactivity light illuminates when the Ethernet controller sends or receives dataover the Ethernet network. If the LAN activity light is off, make sure that thehub and network are operating and that the correct device drivers are loaded.v Make sure that you are using the correct device drivers, supplied with theserver.v Check for operating server-specific causes for the problem.v Make sure that the device drivers on the client and server are using the sameprotocol.v Test the Ethernet controller.The way you test the Ethernet controller depends on which operating systemyou are using (see the Ethernet controller device driver README file).Ethernet controller troubleshooting chartYou can use the following troubleshooting chart to find solutions to 10/100 MBpsEthernet controller problems that have definable symptoms.Table 3. Ethernet troubleshooting chartEthernet controllerproblemSuggested ActionThe server stopsrunning when loadingdevice drivers.The PCI BIOS interrupt settings are incorrect.Check the following:v Determine if the IRQ setting assigned to the Ethernet controlleris also assigned to another device in the Configuration/SetupUtility program.Although interrupt sharing is allowed for PCI devices, somedevices do not function well when they share an interrupt witha dissimilar PCI device. Try changing the IRQ assigned to theEthernet controller or the other device. For example, forNetWare Versions 3 and 4 it is recommended that diskcontrollers not share interrupts with LAN controllers.v Make sure that you are using the most recent device driveravailable from the World Wide Web.v Run the network diagnostic program.The LAN activity light(when available) doesnot light.Check the following:v Make sure that you have loaded the network device drivers.v The network might be idle. Try sending data from thisworkstation.v Run diagnostics on the LEDs.18 xSeries 200 Type 8479 and xSeries 200VL Type 8481: Hardware Maintenance Manual