DAI (Dynamic ARP Inspection) is a security features that validates ARP packet in network by intercepting ARP packet and validating IP-to-MAC address binding learnt from DHCP SNOOP.

DAI (Dynamic ARP Inspection) is a security measures which allows user to intercept, log and discard ARP packets with invalid MAC address to IP address binding. Once the DAI feature is enabled on the system, ARP packets are re-directed to software and validated against the MAC to IP binding data base before getting forwarded. ARP coming on untrusted port is inspected, validated and forwarded/dropped appropriately.