TLDR
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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}}

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