7 RUNNING NIC DIAGNOSTICSOverviewThis chapter explains how to: Interpret the NIC LEDs. Run the NIC diagnostic tests. View network statistics. Use the 3Com icon in the Windows system tray.Interpreting the LEDsThe EtherLink PCI NICs have light-emitting diodes (LEDs),as described in the following table, that can assist withnetwork troubleshooting.Some LNK LED states do not apply to the AUI, BNC, SC,and ST connectors, as indicated by N/A in the table.ConnectorLED State Meaning RJ-45 AUI BNC SC ST10 LNK(link)On If drivers are installed,the 10BASE-Tconnection is active.Yes N/A N/A N/A YesIf drivers are notinstalled, the NIC isreceiving power.Yes Yes Yes N/A YesOff Something ispreventing theconnection betweenthe NIC and the hubor switch.Yes N/A N/A N/A YesBlinking The cable polarity isreversed. Try adifferent networkcable or contact yoursystem administrator.Yes N/A N/A N/A N/A(continued)
