Port LED based troubleshooting

Port Status LEDs

Port status LED behavior may vary per switch type

Check the Hardware Reference Guide for your particular switch

Port LED based troubleshooting

Color of LED Status of Hardware Recommended Action
No light No light or signal carrier is detected (cable or media) Check media and cable
Steady green Port is online (connected) but has no traffic None
Slow green Port online but segmented, loopback cable or incompatible switch Verify correct device is attached to the port
Fast green Port is in internal loopback None
Flickering green Port is online; traffic flowing None
Flashing or steady yellow POST is running None
Steady orange Port is receiving light or signal but is not online None
Slow orange Port is disabled Enable the port
Fast orange The port is faulty Reset the switch
Alternating green and yellow Port is bypassed Reset the port

 

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