The following sections describe the meanings of the LEDs on Summit X150 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.  | 
                        |
| 
                                 Off  | 
                            
                                 No external power attached.  | 
                        |
| 
                                 FAN  | 
                            
                                 Steady green  | 
                            
                                 Normal operation.  | 
                        
| 
                                 Blinking amber  | 
                            
                                 Fan failure. Switch will continue to operate unless it overheats.  | 
                        |
| 
                                 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.  | 
                        |
| 
                                 Port number 1 – 24 or 1 – 48  | 
                            
                                 Steady green  | 
                            
                                 Link is OK.  | 
                        
| 
                                 Blinking green  | 
                            
                                 Port is transmitting packets.  | 
                        |
| 
                                 Off  | 
                            
                                 Link is not present, or port is disabled.  | 
                        |
| 
                                 Port number 25, 26 or 49, 50 (Shared ports)  | 
                            
                                 Steady green  | 
                            
                                 Link is OK.  | 
                        
| 
                                 Blinking green  | 
                            
                                 Activity.  | 
                        |
| 
                                 Off  | 
                            
                                 Link is not present, or port is disabled.  | 
                        
| Label or Type | Color/State | Meaning | 
|---|---|---|
| 
                                 All front-panel ports  | 
                            
                                 Steady green  | 
                            
                                 Link OK; port is not powered.  | 
                        
| 
                                 Steady amber  | 
                            
                                 Link is OK; port is powered; no traffic.  | 
                        |
| 
                                 Blinking green  | 
                            
                                 Link is OK and transmitting packets; port is not powered.  | 
                        |
| 
                                 Blinking amber  | 
                            
                                 Link is OK and transmitting packets; port is powered.  | 
                        |
| 
                                 Slow blinking amber  | 
                            
                                 No link, or disabled port; port is powered.  | 
                        |
| 
                                 Alternating amber and green  | 
                            
                                 Port has a power fault.  | 
                        |
| 
                                 Off  | 
                            
                                 Port is not powered, has no link, or is disabled.  | 
                        
| Label or Type | Color/State | Meaning | 
|---|---|---|
| 
                                 Management Port  | 
                            
                                 Right LED: Steady green  | 
                            
                                 Link is OK.  | 
                        
| 
                                 Left LED: Blinking green  | 
                            
                                 Activity.  | 
                        |
| 
                                 Both LEDs off  | 
                            
                                 Link is not present.  |