Why cannot a device learn the ARP entries of directly connected PCs

By default, strict ARP learning is enabled on fixed switches. A fixed switch sends an ARP request to a client and learns ARP entries only after receiving an ARP reply from the client. PCs that have wireless network interface cards (NICs) installed do not reply to the ARP requests received from the switch. As a result, the switch cannot learn ARP entries of these PCs. These PCs reply to the ARP requests only after their wireless NICs are restarted. To solve the problem, run the undo arp learning strict command in the system view to disable strict ARP learning.

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