The following sections describe the meanings of the LEDs on Summit X350 switches.
| Label or Type | Color/State | Meaning | 
|---|---|---|
| MGMT | Blinking green (fast) | Power-on self-test (POST) in progress. | 
| Steady green | POST passed. System is booting image. | |
| Blinking green (slow) | Normal operation | |
| Blinking amber | 
                                 Switch diagnostics are running. or System is disabled. POST failed or system overheated.  | 
                        |
| FAN | Steady green | Normal operation | 
| Blinking amber | Failure | |
| Off | No power | |
| PSU-I (Internal power supply) | Steady green | Normal operation | 
| Blinking amber | Failure | |
| Off | No power | |
| PSU-E (External power supply) | Steady green | Normal operation | 
| Blinking amber | Failure | |
| Off | No external power attached. | 
| Label or Type | Color/State | Meaning | 
|---|---|---|
| 
                                 Ethernet Ports 1 – 24 or 1 – 48 (21 – 24 and 45 – 48 are shared ports)  | 
                            Steady green | Link OK | 
| Blinking green | Activity | |
| Off | 
                                 Link is not present. or Port is disabled.  | 
                        
| Label or Type | Color/State | Meaning | 
|---|---|---|
| Management Port | Steady green | Link OK | 
| Blinking green | Activity | |
| Off | Link is not present. | |
| 
                                 SFP+ 10G Port (on installed option card)  | 
                            Steady green | Link OK | 
| Blinking green | Activity | |
| Off | Link down | |
| 
                                 XFP 10G Port (on installed option card)  | 
                            Steady green | Link OK | 
| Blinking green | Activity | |
| Off | Link down |