Thank for your idea, but if Repeater wifi is attacker. In my case, wifi device and repeater wifi device haven't stp or something method prevent it.

This is cisco switch log:File Logging: Level debug. File Messages: 53 Logged, 53 Dropped.01-Dec-2022 11:18:22 %COPY-I-FILECPY: Files Copy - source URL flash://logging destination URL HTTP://172.16.1.106/01-Dec-2022 11:17:53 %AAA-I-CONNECT: New http c...

That right!as I said above. I used STP, Loopback Detection, Storm Control on Cisco Switch but it doesn't working. You have new idea ?

Do mean that the cisco switch does not understand the LOOP PACKAGE from the wifi device? Do I need to configure both the cisco switch and the wifi device, right?

I intentionally made a loop at Repeater wifi device and cisco switch can't detection that.