Our subnet is connected with other subnets with router. Using wireshark I see some arp requests coming to ip addresses of our subnet from the router. Such as
Broadcast ARP 60 Who has 10.162.3.172? Tell 10.162.0.1
Where 10.162.0.1 is the router. I want to determine the source computer from other subnet, which sends this requests. How can I perform it?
UPD subnet is 10.162.0.3.172/24 But if ARP never crosses broadcast domain boundaries then how computers from other networks can know destination of the packets(destination physical address) ? Is it obtained from the arp-table of the router? And why could router send arp requests, except probing addresses in the lease range to see which of them are free?