Cisco Systems 520 manual System LED, PoE LED

Chapter 1 Introduction

			Hardware Features
4	SYSTEM LED	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). POST is a series
			of tests that runs automatically to ensure that the switch
			functions properly. It might take several minutes for the
			switch to complete POST.
		Solid amber	Switch is faulty, is rebooting, or is in recovery.
5	ALERT LED	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. The Alert LED stays amber until the Alert Log is cleared. For more
		information about the Alert LED and Alert Log, see Table 6-1and the “Review
		the Alert Log” section on page 6-8.
		Off (dark)	No switch problem is detected.
		Solid amber	A switch problem is detected.
6	PoE LED	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.
7	RPS LED	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.

	User Guide for the Catalyst Express 520 Switches
OL-12761-02		1-7