What does “arp who-has tell” means?


05:47:34.050566 arp who-has xxx.xxx.xxx.xxx tell yyy.yyy.yyy.yyy

Basically this means that yyy.yyy.yyy.yyy has data to send to xxx.xxx.xxx.xxx but don’t know the MAC address associated to it, so it’s trying to update the ARP table cache.

For geeks who want to understand thoroughly, check links below:

RFC826

ARP by Wireshark

ARP

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