What are precautions for configuring intra-VLAN proxy ARP and inter-VLAN proxy ARP

Compared with routed proxy ARP, intra-VLAN proxy ARP and inter-VLAN proxy ARP can determine whether VLAN information meets proxy requirement based on ARP entries matching source and destination IP addresses of packets. If no ARP entry matches the destination IP address of a packet, the switch broadcasts an ARP request in all sub-VLANs of the super-VLAN to learn the APR entry matching the destination IP addresses.

When multiple switches on a network have proxy ARP enabled and a requested destination IP address does not exist, this ARP broadcast packet triggers the same proxy process on other switches. This cyclic proxy process will cause a broadcast storm.

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