arp_ignore

Define different modes for sending replies in response to received ARP requests that resolve local target IP addresses:

  • 0 - (default) reply for any local target IP address, configured on any interface
  • 1 - reply only if the target IP address is local address configured on the incoming interface
  • 2 - reply only if the target IP address is local address configured on the incoming interface and both with the sender's IP address are part from same subnet on this interface
  • 3 - do not reply for local addresses configured with scope host, only resolutions for global and link addresses are replied
  • 4 - 7 - reserved
  • 8 - do not reply for all local addresses

The max value from conf/{all,interface}/arp_ignore is used when ARP request is received on the {interface}.