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 |
| Power Supply Units LEDs | Shows the health of the power supply units. | Green |
| 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 |
*This function is currently disabled.
System Status LED
Both of the System Status LEDs (front and back, if exist) supply identical information.
System Status LEDs - Front and Rear Sides
| Front Panel | Description | Rear Panel |
|---|---|---|
| Both of the System Status LEDs (front and back) supply identical information. |
|
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. This assignment is valid on managed systems only. | Wait up to five minutes for the end of the booting process. |
| Solid Amber | 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 LED
Fan Status LED in SN2700 - Front and Rear Sides
| Both of these LEDs in the red ovals show the fans’ status. |
|
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. |
| Off | System boot | N/A |
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. |
| Off | System boot | N/A |
* A limited number of MSB7800-ES2F system units may show Solid Red instead of Solid Amber.
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
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.
Power Status LED
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
| LED Behavior | Description | Action Required |
|---|---|---|
| Solid Green | All plugged (one or two) power supplies are running normally. | N/A |
| Solid Amber | One or both of the power supplies are not operational or not powered up/ the AC power cable is 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 |
The power supply status LEDs on the rear side of the system 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
Port LEDs
Port LEDs in InfinBand 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 |
| Solid Amber | Link is up. | Wait for the Logical link to raise. Check that the SM is up. |
| Flashing Amber | A problem with the link. | Check that the SM is up. |
In InfiniBand system mode, the LED indicator, corresponding to each data port, will light orange when the physical connection is established (that is, when the unit is powered on and a cable is plugged into the port with the other end of the connector plugged into a functioning port). When a logical connection is made the LED will change to green. When data is being transferred the light will blink green.
