Each QSFP28 port has four??? green??? LEDs. The following table describes the states for the LEDs.
| Label or Type | Color/State | Meaning |
|---|---|---|
| PSU1, PSU2 (Power Supplies) |
Steady green | PSU is installed and providing power |
| Steady amber | PSU is installed but input power is disconnected or unit fault detected | |
| Off | PSU is not installed | |
| FAN | Steady green | All fans operating normally |
| Steady amber | A fan has been removed or fault detected | |
| Off | No power to fan modules | |
| SYS (System) |
Steady green | System loaded properly and is ready |
| Steady amber | Either the PSU or fan or both are faulty, not present, or the system has not loaded properly | |
| Off | CPU power is off | |
| PWR (Power) |
Steady green | Normal operation |
| Blinking green | System in reset | |
| Off | Unit not operational | |
| SECURE | Steady blue | Authentication complete |
| Very slow blinking blue (0.25Hz) | Bypass authentication (debug only) | |
| Fast blinking blue (4Hz) | Authentication failed | |
| Slow blinking blue (1Hz) | Authenticating or updating images | |
| Off | Authentication begin or fault |