Dell PowerEdge M520 Dell PowerConnect M6220/M6348/M8024/M8024-k CLI Referen - Page 341
Dynamic ARP Inspection Commands, Commands in this arp access-list, Syntax
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13 Dynamic ARP Inspection Commands Dynamic ARP Inspection (DAI) is a security feature that rejects invalid and malicious ARP packets. The feature prevents a class of man-in-the-middle attacks, where an unfriendly station intercepts traffic for other stations by poisoning the ARP caches of its neighbors. The miscreant sends ARP requests or responses mapping another station IP address to its own MAC address. DAI drops ARP packets whose sender MAC address and sender IP address do not match an entry in the DHCP Snooping bindings database. Commands in this Chapter This chapter explains the following commands: arp access-list clear ip arp inspection statistics ip arp inspection filter ip arp inspection limit ip arp inspection trust ip arp inspection validate ip arp inspection vlan permit ip host mac host show arp access-list show ip arp inspection show ip arp inspection vlan arp access-list Use the arp access-list command to create an ARP ACL. It will place the user in ARP ACL Configuration mode. Use the "no" form of this command to delete an ARP ACL. Syntax arp access-list acl-name no arp access-list acl-name • acl-name - A valid ARP ACL name (Range: 1-31 characters). Dynamic ARP Inspection Commands 341
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