楼主参考一下下面表格
Table 11. Meaning of Switch LED Colors in Different Modes
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.
| Note | The LED will blink green even when there is very little control traffic. |
|
Blinking amber | Link is off due to a fault or because it has exceeded a limit set in the switch software.
| Caution | Link faults occur when noncompliant cabling is connected to an SFP/SFP+/SFP28 port. Use only standard-compliant cabling to connect to Cisco SFP/SFP+/SFP28 ports. You must remove from the network any cable or device that causes a link fault. |
|
Amber | Link for the SFP/SFP+/SFP28 has been disabled. |
来源：Cisco Catalyst 9300 Series Switches Hardware Installation Guide
https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/hardware/install/b_c9300_hig/b_c9300_hig_chapter_01001.html
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Rockyw | If it solves your problem, please mark as answer. Thanks !
