Cisco 2431 - IAD Router Hardware Installation Manual page 56

Diagnosing Problems
Table 3-1
Symptom
Switch does not recognize the
SFP module
The switch port is placed in
error-disabled state after an SFP
module is inserted
Cisco ME 2400 Ethernet Access Switch Hardware Installation Guide
3-4
Common Problems and Their Solutions (continued)
Possible Cause
The SFP module might be installed
upside down.
The SFP module does not snap into
the slot.
Bad or non-Cisco-approved SFP
module.
Chapter 3 Troubleshooting
Resolution
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.
Remove the SFP module from
the 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 switch command
reference guide for information
on the errdisable recovery
command.
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