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Diagnosing Problems
Table 3-1
Symptom
No connectivity
Unreadable characters on the
management console
Amber system LED
The blade switch port is placed
in error-disabled state after SFP
module is inserted
Switch does not recognize the
SFP module
Cisco Catalyst Blade Switch 3040 for FSC Hardware Installation Guide
3-4
Common Problems and Their Solutions (continued)
Possible Cause
Incorrect or bad cable
These are results of no link at both
ends:
A crossover cable was used
•
when a straight-through was
required, or vice-versa.
•
The cable is wired incorrectly.
•
A crossover or straight-through
cable is wired incorrectly.
•
STP checking for possible
loops.
Incorrect baud rate.
Fatal POST error detected.
Bad or non-Cisco-approved SFP
module.
The SFP module might be installed
upside down.
The SFP module does not snap into
the slot.
Chapter 3
Troubleshooting
Resolution
For the correct pinouts and
•
the proper application of
crossover or
straight-through cables, see
the
"Two Twisted-Pair
Cable Pinouts" section on
page
B-3.
Replace with a tested good
•
cable.
For 1000BASE-T
•
connections, be sure to use
a twisted four-pair,
Category 5 cable.
Wait 30 seconds for the port
•
LED to turn green.
Reset the emulation software to
9600 baud.
Contact Cisco Systems.
Remove the SFP module from
the blade switch, and replace it
with a Cisco-approved module.
Use the errdisable recovery
cause gbic-invalid global
configuration command to
verify the port status, and enter a
time interval to recover from the
error-disabled state.
Refer to the blade switch
command reference guide for
information on the errdisable
recovery command.
Verify that the SFP module is
not installed upside down.
Remove the SFP module.
Inspect for physical damage to
the connector, the module, and
the module slot.
Replace the SFP module with a
known good SFP module.
OL-10694-01
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