HP Embedded Firewall manual Troubleshooting the NIC, Interpreting the NIC LEDs, 3CR990B-97 NIC

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Troubleshooting the NIC

This chapter describes procedures for locating problems you might have with the 3Com 10/100 Secure (3CR990B) 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.

NOTE: 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 NIC LEDs

The 3CR990B NICs have light-emitting diodes (LEDs), as described in the following tables, that can assist with network troubleshooting.

3CR990B-97 NIC

LED	State	Meaning
YEL/100 GRN/10	Yellow	If drivers are installed, the 100BASE-TX connection is
		active.
		If drivers are not installed, the NIC is receiving power.
	Green	If drivers are installed, the 10BASE-T connection is active.
		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 your system administrator.
ACT (activity)	Blinking	Network traffic is present.
	Steady	Heavy network traffic is present.
	Off	No network traffic is present.

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