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Introducing the Switch
Front of the Switch
LEDs
On the 2520G-PoE switches, there are three groupings of LEDs:
■ switch status LEDs (Table 1-2)
■ port LEDs (Table 1-3)
■ Port LED Mode indicator LEDs (near the selector button) (Table 1-4)
Table 1-2. Switch Status LEDs
Switch LEDs State Meaning
Power
(green)
On The internal power supply is working properly.
Off No power connection. The switch is NOT receiving power.
Fault
(orange)
Off The normal state; indicates there are no fault conditions on the switch.
Flashing
2
A fault has occurred with a component on the switch. The Status LED for
the component with the fault will flash simultaneously.
On On briefly after the switch is powered on or reset, at the beginning of
switch self test. If this LED is on for a prolonged time, the switch has
encountered a fatal hardware failure, or has failed its self test. See
chapter 4, “Troubleshooting” for more information.
Locator
(blue)
On
Flashing
Off
The Locator LED is used to locate a specific switch in an area full of
switches. The LED can be set to be on solid or flash for a specified number
of minutes (1-1440). The default is 30 minutes. Use the command
“chassislocate”.
PoE
(green/orange)
On green
Flashing
orange
2
Flashing
orange
1
Normal operation. The switch is ready to supply PoE power
One or more ports has experienced a fault condition for PoE delivery. The
Fault LED will be flashing simultaneously. If it is a self test failure, the Test
LED will be flashing simultaneously. When the switch is put in PoE LED
Mode, the Mode LED for the port with the problem will also be flashing
simultaneously.
One or more ports has an alert condition for PoE delivery, for example, an
oversubscription condition (not enough PoE power available). Only this
LED will be flashing, the Fault LED is off. When the switch is put in PoE
LED Mode, the Mode LEDs for the ports with the alert condition will also
be flashing.
Fan
(green/orange)
(Switch 2520G-
24-PoE only)
On green The cooling fan is operating normally.
Flashing
orange
2
The cooling fan has failed. The switch Fault LED will be flashing
simultaneously.