ip neighbour

Neighbour/ARP tables management IP subcommand. More information: https://manned.org/ip-neighbour.8.

• Display the neighbour/ARP table entries:
  ip neighbour
• Remove entries in the neighbour table on device eth0:
  sudo ip neighbour flush dev {{eth0}}
• Perform a neighbour lookup and return a neighbour entry:
  ip neighbour get {{lookup_ip}} dev {{eth0}}
• Add or delete an ARP entry for the neighbour IP address to eth0:
  sudo ip neighbour {{add|del}} {{ip_address}} lladdr {{mac_address}} dev {{eth0}} nud reachable
• Change or replace an ARP entry for the neighbour IP address to eth0:
  sudo ip neighbour {{change|replace}} {{ip_address}} lladdr {{new_mac_address}} dev {{eth0}}