Understanding the LEDs

The switch consists of multiple LEDs to monitor switch activity and performance. You can also monitor the status of the fan tray assembly and the power supplies.

LED Indicators

LEDs on Cisco Catalyst 9500X Series Switches

Cisco Catalyst 9500X Series Switches have LEDs on the front and the rear panel of the chassis. Following illustration helps you identify the various LEDs available on the front and the rear panel of the switch.

Figure 1. LEDs on the Front Panel of C9500X-28C8D


Figure 2. LEDs on the Front Panel of C9500X-60L4D

1

System LED

4

Fan Module LED

2

Blue beacon LED

5

Port LEDs

3

Power Supply Unit (PSU) LED

-

-
Figure 3. LEDs on the Rear Panel


1

System LED

4

Ethernet Management port link status LED

2

Blue beacon LED

5

Ethernet Management port link activity LED

3

SSD LED

6

Fan LED

System LED

The system LED indicates the status of the system.

Table 1. System LED Indicator

Color/State

Description

Off

System is not operational.

Green

System is operating normally without alarms.

Amber

System has triggered a minor environmental alarm.

Red

System has triggered a major environmental alarm.

Power Supply LEDs

Table 2. Power Supply LED Indicators for Two PSUs

Color/State

Description

Green

Power supply is operating normally. Both PSUs are in the bay with active power.

Amber

One of the PSU has input loss.

Red

One of the PSU has output failure.

If only one power supply module is installed in the switch and it is operating normally, the power supply LED turns green. If the single power supply unit fails, the switch is powered off.

Port LEDs and Modes

The port LEDs display only the port status.

Table 3. Meaning of Switch LED Colors for Port Status LED
Port LED Color Meaning

Green

Port link is up.

Amber

Port link is disabled, that is, administratively down.

Off

No signal is detected, the link is down, or the port is not connected.

Alternating Green and Amber

Indicates port beacon.

Blinking Amber

Indicates link faults such as excessive collision, CRC errors and Jabber errors.

Blinking Green

Indicates traffic on the port.
Traffic Utilization Blinking Rate

Less than 5%

Nil

Between 5% and 30%

At a rate of 1.2 seconds.

Between 30% and 70%

At a rate of 0.4 seconds.

More than 70%

At a rate of 0.2 seconds.

Beacon LED

The UID and the Beacon LED can be turned on by the administrator to indicate that the switch needs attention. It helps the administrator identify the switch. The beacon can be turned on by either pressing the UID button on the switch front panel, or by using the CLI. There is a blue beacon on the front and rear panel of the switch. The blue beacon on the front panel is a button labeled UID, and on the back panel it is a LED labeled BEACON.

Color/State

Description

Solid blue

The operator has indicated that the system needs attention.

Fan LED

Table 4. Fan LED Indicator

Color/State

Description

Off

The fan is not receiving power; the fans have stopped.

Green

The fan is operating normally.

Amber

The fan has encountered a fault.

Ethernet Management Port LED

The following table describes the colors and the descriptions of the LEDs for link activity and link status of the Ethernet management port.

Table 5. Ethernet Management Port Link Activity LED
Color Description

Blinking green

Link is up.

Off

Link is down.

Table 6. Ethernet Management Port Link Status LED
Color Description

Solid green

Link is up.

Off

Link is down.