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موضوع:Configuring a Static ARP Entry
In order to ensure layer three to layer two communication, a switch or router needs to have an ARP table, this table is a local table that contains ip addresses and their matching associated MAC addresses.
Lets say for example R1 needs to communicate with R2. R1 will first send an ARP request thus requesting the MAC address of R2′s IP address (10.1.1.2/24) and once it receives a reply the information will be placed into R1′s ARP table. Now R1 knows the destination MAC address to use in the frame(s) when sending traffic destined to 10.1.1.2
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