What is DAI (Dynamic ARP Inspection)? | How to configure Dynamic ARP Inspection DAI?

Dynamic ARP Inspection

ARP (Address Resolution Protocol) it’s a communication protocol. Networking devices are

used for discovering MAC (media access control) addresses, associating with an IPv4

address (internet layer address), and mapping the MAC addresses to IPv4 addresses, this

mapping is done dynamically and stored in the ARP cache. ARP works between layer 2 and

layer 3 of the OSI because the MAC address exists on the data link layer and the IP address

exists on the network layer. In other words, Address Resolution Protocol (ARP) is a Layer 2

protocol that maps an IP address (Layer 3) to a MAC address (Layer 2).

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