3Com 3CR990-TX-95, 3CR990-TX-97, 3CR990SVR97, 3CR990SVR95 manual Interpreting the LEDs, State Meaning

8 TROUBLESHOOTING THE NIC

Overview

This chapter describes procedures for locating problems you might have with the EtherLink PCI NIC. It explains how to:

■Interpret the NIC LEDs.

■Access 3Com support databases.

■Troubleshoot NIC installation problems.

■Troubleshoot NIC and network connection problems.

■Troubleshoot Remote Wake-Up.

■Remove the network driver.

To access a database of technical information that can help you diagnose and solve NIC installation, configuration, and upgrade problems, go to:

http://knowledgebase.3com.com

Interpreting the LEDs

The EtherLink PCI NICs have light-emitting diodes (LEDs), as described in the following table, that can assist with network troubleshooting. Three LEDs are located below the cable connector. The LEDs operate as follows:

LED	State	Meaning
10 LNK	On	If drivers are installed, the 10BASE-T connection is active.
(link)
		If drivers are not installed, the NIC is receiving power.
	Off	Something is preventing the connection between the NIC and
		the hub or switch.
	Blinking	The cable polarity is reversed. Try a different network cable or
		contact the system administrator.