<refentry id="arping">

<refmeta>
<refentrytitle>arping</refentrytitle>
<manvolnum>8</manvolnum>
<refmiscinfo>iputils-&snapshot;</refmiscinfo>
</refmeta>


<refnamediv>
<refname>arping</refname>
<refpurpose>send ARP REQUEST to a neighbour host</refpurpose>
</refnamediv>

<refsynopsisdiv>
<cmdsynopsis>
<command>arping</command>
<arg choice="opt"><option>-AbDfhqUV</option></arg>
<arg choice="opt">-c <replaceable/count/</arg>
<arg choice="opt">-w <replaceable/deadline/</arg>
<arg choice="opt">-s <replaceable/source/</arg>
<arg choice="req">-I <replaceable/interface/</arg>
<arg choice="req"><replaceable/destination/</arg>
</cmdsynopsis>
</refsynopsisdiv>

<refsect1><title>DESCRIPTION</title>
<para>
Ping <replaceable/destination/ on device <replaceable/interface/ by ARP packets,
using source address <replaceable/source/.
</para>
</refsect1>

<refsect1><title>OPTIONS</title>

<variablelist>

 <varlistentry>
  <term><option/-A/</term>
  <listitem><para>
The same as <option/-U/, but ARP REPLY packets used instead
of ARP REQUEST.
  </para></listitem>
 </varlistentry>

 <varlistentry>
  <term><option>-b</option></term>
  <listitem><para>
Send only MAC level broadcasts. Normally <command/arping/ starts
from sending broadcast, and switch to unicast after reply received.
  </para></listitem>
 </varlistentry>


 <varlistentry>
  <term><option><anchor id="arping.count">-c <replaceable/count/</option></term>
  <listitem><para>
Stop after sending <replaceable/count/ ARP REQUEST
packets. With 
<link linkend="arping.deadline"><replaceable/deadline/</link>
option, <command/arping/ waits for
<replaceable/count/ ARP REPLY packets, until the timeout expires.
  </para></listitem>
 </varlistentry>

 <varlistentry>
  <term><option/-D/</term>
  <listitem><para>
Duplicate address detection mode (DAD). See 
<ulink url="http://tools.ietf.org/rfc/rfc2131.txt">RFC2131, 4.4.1</ulink>.
Returns 0, if DAD succeeded i.e. no replies are received
  </para></listitem>
 </varlistentry>

 <varlistentry>
  <term><option>-f</option></term>
  <listitem><para>
Finish after the first reply confirming that target is alive.
  </para></listitem>
 </varlistentry>

 <varlistentry>
  <term><option><anchor id="opt.interface">-I <replaceable/interface/</option></term>
  <listitem><para>
Name of network device where to send ARP REQUEST packets.
  </para></listitem>
 </varlistentry>

 <varlistentry>
  <term><option>-h</option></term>
  <listitem><para>
Print help page and exit.
  </para></listitem>
 </varlistentry>


 <varlistentry>
  <term><option/-q/</term>
  <listitem><para>
Quiet output. Nothing is displayed.
  </para></listitem>
 </varlistentry>

 <varlistentry>
  <term><option><anchor id="opt.source">-s <replaceable/source/</option></term>
  <listitem><para>
IP source address to use in ARP packets.
If this option is absent, source address is:
   <itemizedlist>
    <listitem><para>
In DAD mode (with option <option/-D/) set to 0.0.0.0.
    </para></listitem>
    <listitem><para>
In Unsolicited ARP mode (with options <option/-U/ or <option/-A/)
set to <replaceable/destination/.
    </para></listitem>
    <listitem><para>
Otherwise, it is calculated from routing tables.
    </para></listitem>
   </itemizedlist>
  </para></listitem>
 </varlistentry>

 <varlistentry>
  <term><option/-U/</term>
  <listitem><para>
Unsolicited ARP mode to update neighbours' ARP caches.
No replies are expected.
  </para></listitem>
 </varlistentry>

 <varlistentry>
  <term><option>-V</option></term>
  <listitem><para>
Print version of the program and exit.
  </para></listitem>
 </varlistentry>


 <varlistentry>
  <term><option><anchor id="arping.deadline">-w <replaceable/deadline/</option></term>
  <listitem><para>
Specify a timeout, in seconds, before
<command/arping/
exits regardless of how many
packets have been sent or received. In this case
<command/arping/
does not stop after
<link linkend="arping.count"><replaceable/count/</link>
packet are sent, it waits either for
<link linkend="arping.deadline"><replaceable/deadline/</link>
expire or until
<link linkend="arping.count"><replaceable/count/</link>
probes are answered.
  </para></listitem>
 </varlistentry>
</variablelist>
</refsect1>

<refsect1><title>SEE ALSO</title>
<para>
<link linkend="ping">
<citerefentry><refentrytitle/ping/<manvolnum/8/</citerefentry></link>,
<link linkend="clockdiff">
<citerefentry><refentrytitle/clockdiff/<manvolnum/8/</citerefentry></link>,
<link linkend="tracepath">
<citerefentry><refentrytitle/tracepath/<manvolnum/8/</citerefentry></link>.
</para>
</refsect1>

<refsect1><title>AUTHOR</title>
<para>
<command/arping/ was written by
<ulink url="mailto:kuznet@ms2.inr.ac.ru">Alexey Kuznetsov
&lt;kuznet@ms2.inr.ac.ru&gt;</ulink>.
It is now maintained by
<ulink url="mailto:yoshfuji@skbuff.net">YOSHIFUJI Hideaki
&lt;yoshfuji@skbuff.net&gt;</ulink>.
</para>
</refsect1>

<refsect1><title>SECURITY</title>
<para>
<command/arping/ requires <constant/CAP_NET_RAW/ capability
to be executed. It is not recommended to be used as set-uid root,
because it allows user to modify ARP caches of neighbour hosts.
</para>
</refsect1>

<refsect1><title>AVAILABILITY</title>
<para>
<command/arping/ is part of <filename/iputils/ package
and the latest versions are  available in source form at
<ulink url="http://www.skbuff.net/iputils/iputils-current.tar.bz2">
http://www.skbuff.net/iputils/iputils-current.tar.bz2</ulink>.
</para>
</refsect1>

<![IGNORE[
<refsect1><title>COPYING</title>
<para>
<literallayout>
This documentation is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public
License Version 2.

This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
 
For more details see the file COPYING in the source
distribution of Linux kernel of version 2.4.
</literallayout>
</para>
</refsect1>
]]>


</refentry>