Cisco Systems WS-X3500-XL manual Troubleshooting, C H A P T E R, Symptom, Possible Causes

C H A P T E R 3

Troubleshooting

Table 3-1describes how to identify problems with the switch and GigaStack

GBIC and how to resolve them.

Table 3-1 Common Problems and Their Solutions

Symptom	Possible Causes	Corrective Action
GBIC module slot	Spanning Tree Protocol	Wait for STP to complete its search. The LED
LED is amber.	(STP) is checking for loops.	turns green when STP completes its check.
	Port is initializing, it was	Use the Cluster Management Suite or the IOS
	disabled by management or	command-line interface to check the status of the
	an address violation, or it	port and to enable it.
	was blocked by STP.
GBIC module slot	Port is experiencing error	Remove and reinsert the GigaStack GBIC.
LED is flashing	frames. This could be due to
green and amber.	a duplex mismatch caused
	by autonegotiation,
	collisions, cyclic
	redundancy check (CRC)
	errors, or alignment errors.
GBIC module slot	Device has no power.	Ensure that the switch and the target device have
LED is off.		power.
	No link or port was shut	Verify that the GBIC cable is connected to another
	down administratively.	active network device and that the port is not shut
		down.
	Bad cable.	Replace with a known good cable.
	Catalyst GigaStack Gigabit Interface Converter Hardware Installation Guide
78-6460-04			3-1