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 |
System Status LED
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. |
It may take up to five minutes to turn on the system. If the System Status LED shows amber after five minutes, unplug the system and call your NVIDIA representative for assistance.
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 Amber | An error has occurred. For example, corrupted firmware, system is overheated etc.. | In case the System Status LED shows amber five minutes after starting the system, refer to Troubleshooting for further instructions. |
Fan Status LED
Fan Status LED - Front and Rear Sides
Front (Ports Side):  | Both of these 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. | Rear (FRUs Side):
|
Fan Status Front LED Assignments
| LED Behavior | Description | Action Required |
|---|---|---|
| Solid Green | All fans are up and running. | N/A |
| Solid Amber | Error, one or more fans are not operating properly. | The faulty FRUs should be replaced. |
Fan Status Rear LED Assignments (One LED per Fan)
| LED Behavior | Description | Action Required |
|---|---|---|
| Solid Green | A specific fan unit is operating. | N/A |
| Solid Amber | A specific fan unit is missing or not operating properly. | The fan unit should be replaced. |
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
The LED in the red oval shows the power supply status.
Front (Ports Side):
*The figure is provided for Illustration purposes only. The design may slightly vary in different systems. |
There are two power supply inlets in the 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 primary power supply (PS) unit is located on the left side of the system, and the secondary unit is located on the right side.
Rear Side Panel
*The figure is provided for Illustration purposes only. The design may slightly vary in different systems.
Power Supply Unit Status Front LED Assignments
| LED Behavior | Description | Action Required |
|---|---|---|
| Solid Green | All power supply units are connected and running normally. | N/A |
| Solid Amber | One or both of the power supplies are not operational or not powered up/ the power cord is disconnected. | Make sure the power cord is plugged in and active. If the problem resumes, refer to Troubleshooting for further instructions. |
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, Standby – On, Main Output - Off | Refer to Troubleshooting. For further assistance, call your NVIDIA representative. |
| Flashing Amber 1Hz | PSU warning - events where the PSU continues to operate | |
| Solid Amber | PSU failure (voltage, current, temperature or fan related issue) | |
| Off | No AC power to all power supplies. | Plug in the AC cor |
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
Port LEDs
SN4600/SN4600C Port LEDs
| SN4600/SN4600C |
|---|
|
SN4600/SN4600C Port LEDs Indications
| LED Behavior | Description | Action Required |
|---|---|---|
| Off | Link is down | Refer to Troubleshooting. |
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 | Refer to Troubleshooting. |
SN4410/SN4700 Port LEDs
Each QSFP module can be used as two 4X ports/four 2X ports/eight 1X ports. Each QSFP-DD 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 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.
SN4410/SN4700 LED Splitting Options
| State | State Indication LEDs [/1 /2 /3 /4] | QSFP Module LED Indication | Comments |
|---|---|---|---|
| 0 |
| Any link is up | See details in Port LEDs Indications (State 0) |
1 |
| 8x/4xA/2xA/1xA |
|
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:
SN4410/SN4700 Port LEDs Indications
| State | LED Behavior | Description | Action Required |
|---|---|---|---|
0 | Off | No 8x/4x/2x/1x link was established on this QSFP module | N/A |
Solid Green | At list one link was established: 8x/4x/2xA/2xB/1xA/1xB/1xC/1xD/1xE/1xF/1xG/1xH | ||
Flashing Green | Traffic is running in linked ports | ||
Flashing Amber | N/A | ||
1-8 | Off | Link is down | |
Solid Green | Link is up with no traffic | ||
Flashing Green | Link is up with traffic | ||
Flashing Amber | A problem with the link | Refer to Troubleshooting. |
