LED Notifications

The system’s LEDs are an important tool for hardware event notification and troubleshooting. All figures depicted on this page are for illustration purposes only; the designs may vary slightly between systems.

LED Symbols

Symbol	Name	Description	Normal Conditions
	System Status LED	Shows the health of the system.	Green or flashing green when booting
	Fan Status LED	Shows the health of the fans.	Green
	Power Supply Units LEDs	Shows the health of the power supply units.	Green
	Unit Identifier LED	Lights up on command through the CLI.	Off or blue when activated by the user

The LED circled in the figure below indicates the system’s status.

Front (Ports Side):

System Status LED Descriptions

Fan Status LED (Front and Rear Sides)

Both of the LEDs circled below indicate the fans’ status.

Front Panel LED:
Rear Panel LED:

Fan Status Front LED Assignments

Fan Status Rear LED Assignments (One LED per Fan)

The LEDs circled below show the power supply status.

Front Panel LED:
Rear Panel LED:

The SN5400 and SN5600 switch models have two power supply inlets in each system for redundancy. The system can operate with only one power supply connected. Each power supply unit has two single-color LEDs on the right side of the unit that indicate the status of the unit.

When viewing the switch from the FRU side, the first power supply (PS) unit is located on the left side of the system, and the second unit is located on the right side.

Rear Side Panel

PS (1)	Fan Modules	PS (2)

Power Supply Unit Status Front LED Assignments

Power Supply Unit Status Rear LED Assignments

You can activate the blue unit identification LED to locate a particular system within a cluster.

To activate the UID LED on a switch system, run:

            

            
switch (config) # led MGMT uid on
        

To verify the LED status, run:

            

            
switch (config) # show leds
Module LED Status
--------------------------------------------------------------------------
MGMT UID Blues
        

To deactivate the UID LED on a switch system, run:

            

            
switch (config) # led MGMT uid off
        

SN5400 Port LEDs	SN5600 Port LEDs

Each QSFP-DD/OSFP module can be used as two 4× ports or four 2× ports; some modules can be split into eight 1× ports. Each QSFP-DD/OSFP module has one dedicated bi-color LED. The LED splitting control button can be used to display link information for more than one port using only one LED. The lane select button lets you choose between 8 indication states: press the button to cycle through all 8 states. The current state can be identified by the LED splitting state indication LEDs. The states and their indications are detailed in the table below.

	Lane Select LEDs
LED Splitting Control →

LED Splitting Options

State	State Indication LEDs [/1 /2 /3 /4]	OSFP/QSFP-DD Module LED Indication	Comments
0		Any link is up	See details in the Port LEDs Indications table below, state 0
1		8×/4×A/2×A/1×A	See details in the Port LEDs Indications table below, states 1-8. Only one of the link types can be up at a given time.
2		8×/4×B/2×B/1×B
3		8×/2×C/1×C
4		8×/2×D/1×D
5		8×/1×E
6		8×/1×F
7		8×/1×G
8		8×/1×H

Port LED Indications