Cisco Systems ME 2400 manual SFP module might be installed Verify that the SFP module is

Chapter 3 Troubleshooting

Diagnosing Problems

Table 3-1	Common Problems and Their Solutions (continued)
Symptom		Possible Cause	Resolution
Switch does not recognize the		The SFP module might be installed	Verify that the SFP module is
SFP module		upside down.	not installed upside down.
		The SFP module does not snap into	Remove the SFP module.
		the slot.	Inspect for physical damage to
			the connector, the module, and
			the module slot.
			Replace the SFP module with a
			known good SFP module.
The switch port is placed in		Bad or non-Cisco-approved SFP	Remove the SFP module from
error-disabled state after an SFP		module.	the switch, and replace it with a
module is inserted			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.

Cisco ME 2400 Ethernet Access Switch Hardware Installation Guide

3-4 OL-7678-01