@bsz Did you also set a gateway acl or EAP acl? What is your network layout like? What are the specific ACL settings on the controller? Can you share a screenshot?

@rebelbah The switch can be adopted, but the AP can not. It proves the issue isn't on the CPE at least otherwise I don't think the switch can be managed properly. Did you set any VLAN or ACL on the...

@ComExpress Did you turn off the port LED light on another switch? You can set it on some switches' web interface, check it. As you said, if one side's speed doesn't negotiate, another side doesn't...

@rebelbah CPE is a VLAN-Passthrough device, the image shows your CPEs are working properly, what is the issue?

@Cozz Put the mouse on this page and scroll it, you will see the signal here.

@ComExpress It looks like the port speed doesn't negotiate, have you tried changing the port link speed on the switch manually?