Legend

System-Level LEDs

LED Description

SYSTEM

The SYST LED, referred to as the SYSTEM LED, shows the status of the switch (system). This LED is managed through the Cisco IOS software.

 

 

 

 

Off (dark)

Switch is not powered on.

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.

STCK

The STCK LED, referred to as the STACK LED, shows whether the port LEDs are in Stack mode. To display the information of another switch in the stack, choose a stack member number from the Stack list. This LED is on switches with stack ports.

 

 

Off (dark)

Stack mode for the port LEDs is off.

Solid green

Stack mode for the port LEDs is on.

MSTR The MSTR LED, referred to as the MASTER LED, shows whether the switch is the stack master or is a standalone switch. This LED is on switches with stack ports.

 

 

 

Off (dark)

The switch is not the stack master.

Solid green

The switch is the stack master or is a standalone switch.

Solid amber

An error occurred during stack master election or a stack error exists.

MMBR

 

 

 

Off (dark)

The MMBR LED, referred to as the MEMBER LED, remains "off" in the Front Panel view of the device manager. This LED is on switches with stack ports. Either

  • Select the Stack mode from the View list. See also the description of the Stack mode in Port States.
  • See the hardware installation guide for information on the behavior of this LED on the physical switch.

The LED, referred to as the Power Status LED, shows the switch power status. This LED is managed through the chassis server management software.

 

 

Off (dark)

Switch is not inserted in the chassis or the chassis power supply is not functioning properly.

Solid green

Switch is receiving power.

Blinking green

Switch firmware is loading.

The LED, referred to as the HEALTH LED, shows the status of the switch. This LED is managed through the chassis server management software.

 

 

Solid green

Switch is healthy.

Solid amber

Switch is faulty.

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Port States

Ethernet
Management
Port LED

This LED shows the status of the Ethernet Management (FA0) port.

 
Off (dark)

No link is present on the Ethernet Management (FA0) port.

Solid green Link is present between the Ethernet Management (FA0) port and the management station.

By default, the port LEDs show port status. To display the port duplex, the port speed, and switch stack information from the port LEDs, you must use the View list from the device manager or the Mode button on the physical switch.

LED Mode Description
Status

In this mode, the port LEDs show port status.

 

Off (dark) No link.
Solid green Link is up, but there is no activity on the link.
Blinking green

Link has activity.

Solid brown

Port is administratively disabled.

Yellow Port is error disabled.
Blinking green and amber Link is faulty.
Solid amber Port is faulty, is disabled due to an error condition, or is in an STP-blocked state.
Duplex

In this mode, the port LEDs show the duplex mode (full duplex or half duplex) of the ports.

Note: The 10/100/1000 ports operate only in full-duplex mode.

 
Off (dark) No link.
Solid light blue Port is in half-duplex mode.
Solid green Port is in full-duplex mode.
Speed

In this mode, the port LEDs show the operating speed (10, 100, or 1000 Mb/s, or 10 Gb/s) of the ports.

 

Off (dark)

No link.

Solid light blue

10 Mb/s.

Solid green

100 Mb/s.

Blinking green

1000 Mb/s (1 Gb/s).
Fast blinking green 10 Gb/s.

Stack

In this mode, the port LEDs show the switch stack status. This mode is available on switches with stack ports.

 

 

 

 

The STACK LED is off (dark)

Stack mode is off.

Blinking green

Port number means stack member number.

Solid green

Stack cable is connected.

Solid amber

Stack cable is not connected.

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Port Types

RJ-45 port

Internal port

Stack port

Small form-factor pluggable (SFP) module slot (empty)

Cisco Dual SFP X2 converter module (empty)

Fiber-optic SFP module ports

1000BASE-T SFP module port

10-Gigabit X2 module slot (empty)
X2 transceiver module ports
(for 10GBASE-ER, -LR, -SR, or -LX4)
X2 transceiver module port
(for 10GBase-CX4)

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Color-Wavelength Representation in CWDM Module Ports

Note: The circles in the icon for a coarse wave length-division multiplexer (CWDM) module port can be any of eight colors, each denoting a different wave length in nanometers (nm). This table shows the wave length that is denoted by each color. To see the wave length of a CWDM module port, point to its icon.

Color

Wave Length

Gray

1470 nm

Violet

1490 nm

Blue

1510 nm

Green 1530 nm
Yellow 1550 nm
Orange 1570 nm
Red 1590 nm
Brown 1610 nm

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