Status Indicator LEDs
A.1 System-level Status Indicator LEDs
Status indicator LEDs are located on the chassis and on some of the components like PSUs and Fan modules. LEDs are located on the front ( Appendix C) and the rear ( Appendix D) of the switch.
A.1.1 System Status Indicator LED
Figure A-1 displays the system and the fan status LEDs.
Figure A-1: System Status and Fan Status Indicator
 
Table A-1 System Status Indicator LED States
LED Name
LED State
Device Status
System Status LED
Blinking Green
System is powering up.
Green
Normal operations. Due to power supply and fan redundancy, this LED will remain green if a single fan or power supply is missing or in a failed state.
Blue
The locater function is active.
Amber
Two or more fans (any combination of fan modules or PSU fans) are disconnected or malfunctioning. The switch will automatically execute a “graceful shutdown” shortly.
A.1.2 Fan Status Indicator LED
Figure A-1 displays the fan status LED for the system.
 
Table A-2 Fan Status Indicator LED States
LED Name
LED State
Device Status
Fan Status LED
Green
All fan and power modules are operating normally.
Amber
Single fan module is removed or malfunctioning. It is also amber when a PSU is completely removed or has a stuck fan rotor.
Red
Two or more fans (any combination of fan modules or PSU fans) are disconnected or malfunctioning. The switch will automatically execute a “graceful shutdown” shortly.
Note Fan Module status LED is located on the fan module and displays the status of the corresponding fan module.
A.1.3 Port Status Indicator LEDs
Port LEDs, located in the vicinity of their corresponding ports, provide link and operational status. Figure A-2 displays a representative Port LED location on the DCS-7020SR-32C2 switch.
Figure A-2: Port Status LEDs
Table A-3 provides status conditions that correspond to port LED states. Port LED behavior for QSFP+ and SFP+ ports is consistent.
Table A-3 Port LED States (Front)
LED State
Status
Off
Port link is down.
Green
Port link is up.
Yellow
Port is software disabled.
Flashing Yellow
Port failed diagnostics.
A.2 Component Status Indicators
A.2.1 Fan Module Status LED
Each fan and power supply module has an LED that reports the module status. Fan module status LED is on the fan module ( Figure A-3) and is different from the system-level fan status LED ( Section A.1.2).
Figure A-3: Fan Module Status LED
Table A-4 provides status conditions that correspond to fan module status LED states.
 
Table A-4 Fan Module Status LED States
LED State
Status
Off
The fan module is not detected. If it is inserted, it may not be seated properly.
Green
The fan is operating normally. This LED state is exclusive to its fan module, and independent of the states of its neighboring fans and power supplies.
Red
The fan has failed.
A.2.2 PSU Module Status LED
The AC power supply module status LEDs are on the power supply modules ( Figure A-4).
Figure A-4: AC Power Supply Status LED
Table A-5 provides status conditions that correspond to the AC power supply status LED states.
Table A-5 AC Power Supply Status LED States
Power Supply State
PWR-400AC
Input power present
Normal operation
Green
Input power present
Power Supply fault
Yellow
No Input power Supply installed in chassis
Blinking Yellow
Input power present Supply not installed in chassis
Blinking Green
Note You can narrow down the error condition by logging in to the switch to view the specific device state. Refer to the Arista User Manual’s Switch Environment Control chapter, under the topic Viewing Environment Status, for further information on the show environment commands.