Used for setting whether to forward or discard ARP packets received from the network side when the user is offline.
It takes effect only when the ARP unicast function is enabled.
Options:
1. forward(1) -indicates that ARP packets are broadcast to ports inside the VLAN on the user, cascading, and network sides.
2. discard(2) -indicates that ARP packets are discarded on the user side, and only broadcast to ports inside the VLAN on the cascading and network sides.
Default: forward(1)