@MR.S I can't find this option. I'm too stupid.

@MR.S Thank you for your suggestions. All devices have been restarted. Since the system has been producing unstable connections (Wi-Fi) from the start, I always keep the firmware up to date, hoping...

@GRL Hello, where can I enable ARP? I can't find anything about it.

This phenomenon occurs frequently. Eventually, an IP address will be assigned. This is probably the cause of the unstable network.

@MR.S ARP no longer exists, or the function has been moved. The search yielded no results. However, the printer is currently being displayed.

@MR.S ER7412->SG2428P->EAP115Wall This is the path to the client.