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