ip neighbour — Neighbour/ARP tables management IP subcommand. More information: <https://manned.org/ip-neighbour>.

Display the neighbour/ARP table entries

ip {{[n|neighbour]}}

Remove entries in the neighbour table on device `ethX`

sudo ip {{[n|neighbour]}} {{[f|flush]}} dev {{ethX}}

Perform a neighbour lookup and return a neighbour entry

ip {{[n|neighbour]}} {{[g|get]}} {{lookup_ip}} dev {{ethX}}

Add or delete an ARP entry for the neighbour IP address to `ethX`

sudo ip {{[n|neighbour]}} {{add|delete}} {{ip_address}} lladdr {{mac_address}} dev {{ethX}} nud reachable

Change or replace an ARP entry for the neighbour IP address to `ethX`

sudo ip {{[n|neighbour]}} {{change|replace}} {{ip_address}} lladdr {{new_mac_address}} dev {{ethX}}