Solving Ethernet controller problemsThe method that you use to test the Ethernet controller depends on whichoperating system you are using. See the operating-system documentation forinformation about Ethernet controllers, and see the Ethernet controllerdevice-driver readme file.Try the following procedures:v Make sure that the correct device drivers, which come with the server areinstalled and that they are at the latest level.v Make sure that the Ethernet cable is installed correctly.– The cable must be securely attached at all connections. If the cable is attachedbut the problem remains, try a different cable.– If you set the Ethernet controller to operate at 100 Mbps or 1000Mbps, youmust use Category 5 cabling.v Determine whether the hub supports auto-negotiation. If it does not, tryconfiguring the integrated Ethernet controller manually to match the speed andduplex mode of the hub.v Check the Ethernet controller LEDs on the rear panel of the server. These LEDsindicate whether there is a problem with the connector, cable, or hub.– The Ethernet link status LED is lit when the Ethernet controller receives a linkpulse from the hub. If the LED is off, there might be a defective connector orcable or a problem with the hub.– The Ethernet transmit/receive activity LED is lit when the Ethernet controllersends or receives data over the Ethernet network. If the Ethernettransmit/receive activity is off, make sure that the hub and network areoperating and that the correct device drivers are installed.v Check the LAN activity LED on the rear of the server. The LAN activity LED islit 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 devicedrivers are installed.v Check for operating-system-specific causes of the problem, and also make surethat the operating system drivers are installed correctly.v Make sure that the device drivers on the client and server are using the sameprotocol.If the Ethernet controller still cannot connect to the network but the hardwareappears to be working, the network administrator must investigate other possiblecauses of the error.188 System x3750 M4 Types 8722 and 8733: Installation and Service Guide
