arpsend(8) Virtual Environments arpsend(8) NAME arpsend - utility to send ARP requests. SYNOPSIS arpsend < -U -i source_ip | -D  -e target_ip [-e target_ip] ... > [-c count] [-w timeout] interface 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. DIAGNOSTICS 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 not LOOPBACK flags in interface parameters). SEE ALSO vzctl(8), LICENSE Copyright (C) 2000-2006, SWsoft. Licensed under GNU GPL. OpenVZ 12 Sep 2006 arpsend(8)