Port Mode | Port LED Color | Meaning |
STAT (port status) | Off | No link, or port was administratively shut down. |
Green | Link present, no activity. | |
Blinking green | Activity. Port is sending or receiving data. | |
[Alternating green-amber | [Link fault. Error frames can affect connectivity, and errors such as excessive collisions, CRC errors, and alignment and jabber errors are monitored for a link-fault indication. | |
Amber | Port is blocked by Spanning Tree Protocol (STP) and is not forwarding data. After a port is reconfigured, the port LED can be amber for up to 30 seconds as STP checks the switch for possible loops. |
Color | Network Module Link Status | ||
Off | Link is off. | ||
Green | Link is on; no activity. | ||
Blinking green | Activity on a link; no faults.
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Blinking amber | Link is off due to a fault or because it has exceeded a limit set in the switch software.
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Amber | Link for the SFP/SFP+/SFP28 has been disabled. |