LED Notifications

The system’s LEDs are an important tool for hardware event notification and troubleshooting.

LED Symbols

Symbol	Name	Description	Normal Conditions
	System Status LED	Shows the health of the system.	Green/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 in the red oval shows the system’s status.

Front (Ports Side): *The figure is provided for Illustration purposes only. The design may slightly vary in different systems.

System Status LED Assignments

Fan Status LED - Front and Rear Sides

Both of the LEDs in the red ovals show the fans’ status. *The figures are provided for Illustration purposes only. The design may slightly vary in different systems.
Front Panel LED:
Rear Panel LED:

Fan Status Front LED Assignments

Fan Status Rear LED Assignments (One LED per Fan)

The LEDs in the red ovals show the power supply status. *The figures are provided for Illustration purposes only. The design may slightly vary in different systems.
Front Panel LED:
Rear Panel LED:

In the SN5400 and SN5600 switches there are 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 looking from the FRUs 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)

*The figure is provided for Illustration purposes only. The design may slightly vary in different systems.

Power Supply Unit Status Front LED Assignments

Power Supply Unit Status Rear LED Assignments

The UID LED is a debug feature, that the user can use to find a particular system within a cluster by turning on the UID blue LED.

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

*The figures are provided for Illustration purposes only. The design may slightly vary in different systems.

Each QSFP-DD/OSFP module can be used as two 4X ports or four 2X ports, and certain modules can be split to eight 1X ports as well. Each QSFP-DD/OSFP module has one dedicated bi-color LED. In order to provide link information for more than one port by using one LED, LED splitting control button is available. You may use the lane select button to select between 8 indication states. By pressing the button, the next indication state will be selected in a cyclic manner. The current state can be identified by the LED splitting state indication LEDs. The states and their indications are detailed in the below table.

	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 Port LEDs Indications (State 0)
1		8x/4xA/2xA/1xA	See details in Port LEDs Indications (States 1-8). Only one of the link types can be up at a given time.
2		8x/4xB/2xB/1xB
3		8x/2xC/1xC
4		8x/2xD/1xD
5		8x/1xE
6		8x/1xF
7		8x/1xG
8		8x/1xH

The port LED behavior indicates the port state, as follows:

Port LEDs Indications