Switch's port Gi1/0/2 was blocked.

Switch's port Gi1/0/2 was blocked.

Switch's port Gi1/0/2 was blocked.
Switch's port Gi1/0/2 was blocked.
2024-01-23 15:57:04
Model: SG2210P  
Hardware Version: V3
Firmware Version: 3.20.9 Build 20230602 Rel.73473

Switch's port Gi1/0/2 was blocked.  This happens every few minutes.  Why?

 

There is no loop in the network.  Spanning tree is active.

 

How do I find out which device is causing this block to happen?

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Re:Switch's port Gi1/0/2 was blocked.
2024-01-24 01:53:45

Hi @ChrisDV 

Thanks for posting in our business forum.

This log means a loop has been detected. STP intervenes and stops the loop. That's why.

If you believe there is no loop, I am out of options.

 

You remove this device/cable from the port 1/0/2 and it'll stop. That's the fix.

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Re:Switch's port Gi1/0/2 was blocked.
2024-01-24 02:14:12

  @Clive_A   Definitely no loop.   And the problem moves around each switch. If I disable one, the blocking action moves to another AP and another switch.  

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