The following illustrations show the port-side view of the 8720 switch showing the port and system LEDs.
| 1 = 40Gbps/100Gbps QSFP+/QSFP28 Ethernet ports | 2 = RJ45 serial console port |
| 3 = Status LEDs | 4 = Type A USB port |
| 5 = RJ-45 out-of-band 10/100/1000BASE-T management Ethernet port
MGMT2 - CPU and BMC (secondary) |
6 = RJ-45 out-of-band 10/100/1000BASE-T management Ethernet port
MGMT1 - Direct to CPU (primary) |
| Port Configuration | Color/State | Meaning |
|---|---|---|
| 100 Gb or 4x25 Gb |
Steady green | Port OK |
| Blinking green | Port transmitting or receiving | |
| Slow blinking green | Port disabled by software | |
| Off | No link/Fault | |
| 40 Gb or 4x10 Gb |
Steady green | Port OK |
| Blinking green | Port transmitting or receiving | |
| Slow blinking green | Port disabled by software | |
| Off | No link/Fault |
| 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 |