arpsend(8) Virtual Environments arpsend(8)

arpsend - utility to send ARP requests.

arpsend < -U -i source_ip-D  -e target_ip [-e target_ip] ... > [-c count] [-w timeout] interface

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

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).

-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.

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

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

Interface you use have to be arpable and not be loopback (i.e. /sbin/ip link show interface should show neither NOARP not LOOPBACK flags in interface parameters).

vzctl(8),

Copyright (C) 2000-2007, SWsoft. Licensed under GNU GPL.
12 Sep 2006 OpenVZ