The system’s LEDs are an important tool for hardware event notification and troubleshooting.
LEDs 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 |
a | Power Supply Units LEDs | Shows the health of the power supply units. | Green |
b | Bad Port LED | Lights up when a symbol error is detected on one of the ports. | Off |
| Unit Identifier LED | Lights up on command through the CLI. | Off or blue when identifying a port |
a. There are two PSU LEDs in SN2100/SN2010.
b. This LED exists in SN2700 and SN2410 only.
System Status LEDs
Both of the System Status LEDs (front and back, if exist) supply identical information.
System Status LEDs - Front and Rear Sides
| LED Type | System | Front | Rear |
|---|---|---|---|
System Status LEDs | SN2700 | Yes | Yes |
| SN2740 | Yes | No | |
| SN2410 | Yes | Yes | |
| SN2100 | Yes | No | |
| SN2010 | Yes | No | |
| SN2201 | Yes | No |
System Status LED Assignments
| LED Behavior | Description | Action Required |
|---|---|---|
| Solid Green | The system is up and running normally. | N/A |
| Flashing Green | The system is booting up. | Wait up to five minutes for the end of the booting process. |
| Solid Red | Major error has occurred. For example, corrupted firmware, system is overheated etc. | If the System Status LED shows red five minutes after starting the system, unplug the system and call your NVIDIA representative for assistance. |
Fan Status LEDs
| LED Type | System | Front | Rear |
|---|---|---|---|
Fan Status LEDs | SN2700 | Yes | Yes, 4 |
| SN2740 | Yes | No | |
| SN2410 | Yes | Yes, 4 | |
| SN2100 | Yes | No | |
| SN2010 | Yes | No | |
| SN2201 | Yes | Yes*, 4 |
*The fans status is reflected by the LEDs only once the Network Operating System boot is complete.
Fan Status Front LED Assignments
| LED Behavior | Description | Action Required |
|---|---|---|
| Solid Green | All fans are up and running. | N/A |
| Solid Red | Error, one or more fans are not operating properly. | The faulty FRUs should be replaced. |
| Off | System boot | N/A |
Fan Status Rear LED Assignments (One LED per Fan)
The following table does not apply to the SN2100/SN2010 systems.
| LED Behavior | Description | Action Required |
|---|---|---|
| Solid Green | A specific fan unit is operating. | N/A |
| Solid Red | A specific fan unit is missing or not operating properly. | The fan unit should be replaced. |
| Off | System boot | N/A |
Risk of Electric Shock! With the fan module removed, power pins are accessible within the module cavity. Do not insert tools or body parts into the fan module cavity.
Power Supply Status LEDs
Power Supply Status LEDs
| LED Type | System | Front | Rear |
|---|---|---|---|
Power Supply Unit Status LED | SN2700 | Yes | Yes |
| SN2740 | Yes | Yes | |
| SN2410 | Yes | Yes | |
| SN2100 | Yes, 2 | No | |
| SN2010 | Yes, 2 | No | |
| SN2201 | Yes | Yes |
The following information does not apply to the SN2100/SN2010 systems. In these systems, the power supply units are non-replaceable, and there is a designated LED for each unit in the system’s front panel. (Front panel figures are located in the Introduction.)
There are two power supply inlets in the system (for redundancy). The system can operate with only one power supply connected. In case the power supply is an FRU, a second power supply unit can be added to support hot-swap ability. Each power supply unit has a single 2 color LED on the right side of the unit, that indicates the status of the unit.
SN2700 and SN2410 Rear Side Panel
SN2740 Rear Side Panel
The primary power supply (PS) unit is located on the left side, and the secondary unit is located on the right side.
Power Supply Unit Status Front LED Assignments for SN2700, SN2740 and SN2410
| LED Behavior | Description | Action Required |
|---|---|---|
| Solid Green | All plugged (one or two) power supplies are running normally. | N/A |
| Solid Red | PSU is faulty or disconnected. | Make sure the AC cable is plugged in and active. If the problem resumes, the FRUs might be faulty, and should then be replaced. |
| Off | N/A | N/A |
Power Supply Unit Status Front LED Assignments for SN2100/SN2010
| LED Behavior | Description | Action Required |
|---|---|---|
| Solid Green | Power supply is running normally. | N/A |
| Solid Red | PSU is faulty or disconnected. | Make sure the AC cable is plugged in and active. If the problem resumes, the PSU might be faulty. |
| Off | PSU not present | N/A |
The power supply status LEDs on the rear side of the system (in SN2700, SN2740 and SN2410 only) are located on the PSUs themselves. Each PSU has one LED of its own.
Power Supply Unit Status Rear LED Assignments
| LED Behavior | Description | Action Required |
|---|---|---|
| Solid Green | The PSU is running normally. | N/A |
| Flashing Green 1Hz | AC present / Only 12VSB on (PSU off) or PSU in Smart-on state. | Call your NVIDIA representative for assistance. |
| Amber | AC cord unplugged or AC power lost while the second power supply still has AC input power. | Plug in the AC cord of the faulty PSU. |
| PS failure (including voltage out of range and power cord disconnected). | Check voltage. If OK, call your NVIDIA representative for assistance. | |
| Flashing Amber | Power supply warning events where the power supply continues to operate; high temp, high power, high current, slow fan. | Call your NVIDIA representative for assistance. |
| Off | No AC power to all power supplies. | Call your NVIDIA representative for assistance. |
Unit Identification LED
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
Bad Port LED
The Bad Port LED indicator is used to indicate symbol errors in one or more system ports.
Bad Port LED Assignments
| LED Behavior | Description | Action Required |
|---|---|---|
| Off | No symbol errors have been received in last few seconds (normal condition). | N/A |
| Flashing Amber | Error, one or more ports have received symbol errors. | Check symbol error counters on the system UI to identify the ports. |
Port LEDs
| System | Port LEDs |
|---|---|
SN2700 |
|
| SN2740 |
|
| SN2410 | QSFP28:  SFP28: |
| SN2010 | QSFP:  |
| SN2100 |
|
| SN2201 | RJ45: |
In the SN2410 systems, the status of each pair of adjacent QSFP28 ports is indicated by four LEDs, as shown in the picture above:
- While the bottom LEDs signify the port status in regular condition, the upper LEDs operate only when the port is split.
- When one port is split to two, a connection of 100GbE can be utilized in its adjacent port.
- When one port is split to four, it adjacent port is canceled.
- If the ports run at a 100GbE/40GbE speed each, the two lower LEDs (2 and 4) will light green.
- If the ports run at a 50GbE speed each, the left LEDs (1 and 2) will light green for the upper port, and the right LEDs (3 and 4) will light green for the lower port.
- If the ports run at a 25GbE/10GbE speed each, all LEDs may light green, according to the selected lane.
SFP and QSFP Port LEDs in Ethernet System Mode
| LED Behavior | Description | Action Required |
|---|---|---|
| Off | Link is down | Check the cable. |
| Solid Green | Link is up with no traffic | N/A |
| Flashing Green | Link is up with traffic | N/A |
| Flashing Amber | A problem with the link | Check the cable, and replace it if needed. |
1GBase-T LEDs in Ethernet System Mode
| LED Behavior | Description | Action Required |
|---|---|---|
Off | Link is down | Check that the near-end and far-end connectors are properly plugged, check cable integrity. |
Solid Yellow | Link is up | N/A |
Solid Green | Link is up with no traffic | N/A |
Flashing Green | Link is up with traffic | N/A |
