Power Status Led; 10/100 Port Status Leds - Cisco IE 3000 Hardware Installation Manual
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Chapter 1
Overview
Power Status LED
The switch can operate with one or two DC power sources. Each DC input has an associated LED that
shows the status of the corresponding DC input. If power is present on the circuit, the LED is green. If
power is not present, the LED color depends on the alarm configuration. If alarms are configured, the
LED is red when power is not present; otherwise, the LED is off.
If the switch has dual power sources, the switch draws power from the power source with the higher
voltage. If the one of the DC sources fails, the alternate DC source powers the switch, and the
corresponding power status LED is green. The power status for the failed DC source is either off or red,
depending on the alarm configuration.
Table 1-6
Table 1-6
Color
Off
Green
Red
The Pwr A and Pwr B LEDs show that power is not present on the switch if the power input drops below
Note
the low valid level. The power status LEDs only show that power is present if the voltage at the switch
input exceeds the valid level. The difference, or hysteresis, ensures that the power status LEDs do not
oscillate at values near 18 V.
For information about the power LED colors during the power-on self-test (POST), see the
Switch Operation" section on page
10/100 Port Status LEDs
Each 10/100 port has a port status LED, also called a port LED, as shown in
and
Table 1-7
Color
Off
Solid green
Blinking green Activity. Port is sending or receiving data.
Blinking
amber
lists the power status LED colors and meanings.
Power Status LEDs
System Status
Power is not present on the circuit, or the system is not powered up.
Power is present on the associated circuit.
Power is not present on the associated circuit, and the power supply alarm is
configured.
Figure
1-12.
Table 1-7
displays LED information about the switch and the individual ports.
10/100 Port Status LEDs
System Status
No link.
Link present.
A link blocked by Spanning Tree Protocol (STP) is
sending or receiving data.
2-13.
Cisco IE 3000 Switch Hardware Installation Guide
Front-Panel Description
"Verifying
Figure
1-10,
Figure
1-11,
1-15
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