Precautions for enabling intra-VLAN proxy ARP and inter-VLAN proxy ARP on S series switches

For S series switches (except S1700 switches): Different from routed proxy ARP, intra-VLAN proxy ARP and inter-VLAN proxy ARP check whether VLAN information at both ends complies with proxy requirements based on the ARP entries of source and destination IP addresses. Therefore, if the ARP entry of a destination IP address does not exist, the device broadcasts an ARP Request packet to all devices on the VLAN (including all sub VLANs in the super VLAN) to request them to learn this ARP entry. If the proxy function is enabled on multiple switches on a network but the destination IP address does not exist, the ARP broadcast packet will trigger the same proxy process on other switches, and a severe broadcast storm may occur.

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