6-3
User Guide for the Catalyst Express 520 Switches
OL-12761-02
Chapter 6 Monitoring the Switch
Review the Front Panel View and the LEDs
Table 6-1 System-Level LEDS
LED Explanation
SYSTEM The SYSTEM LED shows the status of the switch (system).
Solid green Switch is healthy.
Blinking green Switch is running power-on self-test (POST).
Solid amber Switch is faulty, is rebooting, or is in recovery.
ALERT The ALERT LED shows the presence of a switch problem.
When the switch detects a problem on one or more ports, the Alert LED turns amber. Move
the pointer over the Alert LED to display a description of the most recent problem detected,
the port on which the problem exists, and the time that it was detected. The Alert LED stays
amber until the Alert Log is cleared. Use the link to the Alert Log to see more details about
the problem. For more information, see the “Review the Alert Log” section on page 6-8.
Off (dark) No switch problem is detected.
Solid amber A switch problem is detected.
PoE The PoE LED shows the status of PoE being provided to the ports.
This LED is available on switches that have PoE ports.
Off (dark) PoE to the ports is off.
Solid green One or more ports is receiving PoE.
Blinking amber One or more ports is not receiving PoE because of a fault.
RPS The RPS LED shows the status of a connected redundant power system (RPS).
This LED is available on switches that have an RPS connector.
Off (dark) RPS is off or is not properly connected.
Solid green RPS is connected and is ready to provide back-up power.
Blinking green RPS is connected but is unavailable because it is providing power
to another device.
Solid amber RPS is in standby mode or is in a fault condition.
Blinking amber Switch internal power supply has failed, and the RPS is providing
power to the switch.
