Led Patterns For Poe Troubleshooting - HP J9979A Installation And Getting Started Manual

Troubleshooting
Diagnosing with the LEDs
4-4

LED Patterns for PoE Troubleshooting

Press the LED Mode button to put the switch into PoE mode and the port
Mode LEDs will show which ports are experiencing the problem. The
following tables identify the specific problems that are shown by the LEDs.
1. Check in the table for the LED pattern you see on your switch.
2. Refer to the corresponding diagnostic tip.
Table 1-1. LED Error Indicators
LED Pattern Indicating Problems
Fault Port Link
Off Fast Blinking
Green
Fast Blinking Fast Blinking
Green
Diagnostic Tips:
Tip Problem
➊
PoE oversubscription
condition. All available
PoE power is already
taken by higher-priority
ports.
➋
PoE hardware fault. A
switch hardware
component that is
involved with PoE power
delivery has failed.
Port Mode
Diagnostic
(PoE)
Tips
➊
Fast Blinking
Green
➋
Fast Blinking
Green
If possible add additional PoE power, or redefine port
priorities.
The switch must be replaced.
Solution