Appendix B Troubleshooting, Troubleshooting Chart

APPENDIX B: TROUBLESHOOTING

This chapter provides information about troubleshooting the NETGEAR Model FSM726 Managed Switch. Topics include:

oTroubleshooting chart

oAdditional troubleshooting suggestions

Table B-1 lists symptoms, causes, and solutions of possible problems. Table B-1. Troubleshooting Chart

Symptom	Cause	Solution

Power LED is off.	No power is received	Check the power cord connections for the
		switch at the switch and the connected device.
		Make sure all cables used are correct and
		comply with Ethernet specifications.
Link LED is off or intermittent.	Port connection is not	Check the crimp on the connectors and make
	working.	sure that the plug is properly inserted and
		locked into the port at both the switch and the
		connecting device.
		Make sure all cables used are correct and
		comply with Ethernet specifications. See
		Appendix D.
		Check for a defective adapter card, cable, or
		port by testing them in an alternate
		environment where all products are functioning.
File transfer is slow or	Half- or full-duplex setting	Make sure the attached device is set to auto
performance degradation is a	on the switch and the	negotiate.
problem.	connected device are not
	the same.
A segment or device is not	One or more devices are not	Verify that the cabling is correct. Be sure all
recognized as part of the network.	properly connected, or	connectors are securely positioned in the
	cabling does not meet	required ports. Equipment may have been
	Ethernet guidelines.	accidentally disconnected.
ACT LED is flashing continuously	A network loop (redundant	Break the loop by ensuring that there is only
on all connected ports and the	path) has been created (see	one path from any networked device to any
network is disabled	Figure 2-3).	other networked device.

If the suggestions in Table B-1 do not resolve your problem, refer to the troubleshooting suggestions in this section.

Make sure the network adapter cards installed in the PCs are in working condition and the software driver has been installed.

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