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Configuring ARP Unicast Probe
When the peer device cannot accept broadcast packets, you can configure ARP unicast probe on the local device. The local device then sends a unicast ARP Request packet to detect whether the peer device exists.
Context
On some special networks, user terminals do not accept broadcast packets to ensure network security. Therefore, these user terminals directly discard the received broadcast ARP Request packets and other devices on the networks cannot learn the ARP entries.
After ARP unicast probe is configured, the device sends a unicast ARP Request packet to detect whether a user terminal exists.