Cisco Catalyst 3750 Hardware Installation Manual page 147

Chapter 4 Troubleshooting
Table 4-1 Common Problems and Solutions (continued)
Symptom
Unreadable characters on the
management console
Amber system LED
Switch port in error-disabled
state after SFP or XENPAK
inserted
Powered device connected to
PoE port, but no power given
78-15136-03
Possible Cause
Incorrect baud rate.
Fatal POST error detected.
Bad or non-Cisco-approved SFP or
XENPAK module.
Switch might not have enough power
capacity to deliver PoE to a new
powered device.
PoE might be disabled on switch
port.
Catalyst 3750 Switch Hardware Installation Guide
Diagnosing Problems
Resolution
Reset the emulation software to
9600 baud.
Contact Cisco Systems.
Remove the SFP or XENPAK
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-disable state.
Refer to the switch command
reference guide for information
on the errdisable recovery
command.
Use the Mode button to show the
PoE status for all ports.
If the port status LED is
•
alternating green and
amber, connect the powered
device to an external AC
power source.
If the port status LED is
•
amber, configure the switch
port PoE setting to Auto.
PoE is enabled by
Note
default.
4-7