H3C S5100-SI Operation Manual page 472

Network diagram
Figure 1-4 ARP attack detection and packet rate limit configuration
Configuration procedure
# Enable DHCP snooping on Switch A.
<SwitchA> system-view
[SwitchA] dhcp-snooping
# Specify GigabitEthernet 1/0/1 as the DHCP snooping trusted port and the ARP trusted port.
[SwitchA] interface GigabitEthernet1/0/1
[SwitchA-GigabitEthernet1/0/1] dhcp-snooping trust
[SwitchA-GigabitEthernet1/0/1] arp detection trust
[SwitchA-GigabitEthernet1/0/1] quit
# Enable ARP attack detection on all ports in VLAN 1.
[SwitchA] vlan 1
[SwitchA-vlan1] arp detection enable
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