man arpsend (8): send ARP requests

SYNOPSIS

arpsend -D -e target_ip [ -e target_ip ...] [-c count] [-w timeout] interface
: arpsend

DESCRIPTION

Utility arpsend sends ARP packets on device interface to detect or update neighbours' ARP caches with a given IP.

COMMANDS

Run utility with one of the following commands:

-D: Send broadcast ARP request to detect neighbours with target_ip. You have to specify target_ip (-e option).
-U: Send broadcast ARP request to update neighbours' ARP caches with source_ip. You have to specify source_ip (-i option).

OPTIONS

-c count: Number of packets to send. Default is infinity.
-w interval: Interval between packets, in seconds. Default is 1 second.
-i source_ip_address: Set source IP address field in ARP packet.
-e target_ip_address: Set target IP address field in ARP packet. Note that you can specify -e option multiple times to detect many IP addresses in one utility call.

EXIT STATUS

arpsend returns 0 upon successful execution. If something goes wrong, it returns an appropriate error code.

1 EXC_USAGE: Usage error
2 EXC_SYSTEM: System error
3 EXC_RECV: ARP reply was received

EXAMPLES

To send request on interface eth0 to detect any neighbour computers with IP 192.168.10.200:

   arpsend -D -e 192.168.10.200 eth0

To send request on interface eth0 to update neighbours' ARP caches with IP 192.168.10.200:

   arpsend -U -i 192.168.10.200 eth0

NOTES

Interface you use have to be arpable and not be loopback (i.e. /sbin/ip link show interface should show neither NOARP nor LOOPBACK flags in interface parameters).