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arping(8)							     arping(8)

       arping -	sends arp and/or ip pings to a given host

       arping  [-0aAbBdDeFhpqrRuUv]  [-S host/ip] [-T host/ip] [-s MAC]	   [-t
       MAC] [-c	count] [-i interface] [	-w seconds ] [ -W seconds ] [ -V  vlan
       ] [ -Q priority ] [ -g group ] <host | -B>

       arping --help

       The arping utility sends	ARP and/or ICMP	requests to the	specified host
       and displays the	replies. The host may be specified  by	its  hostname,
       its IP address, or its MAC address.

       One request is sent each	second.

       When pinging an IP an ARP who-has query is sent.	When pinging a MAC ad-
       dress a directed	broadcast ICMP Echo request is sent. For more  techni-
       cal explanation and an FAQ, see the README file.

       Note on timing

       ARP  packets are	usually	replied	to (on a LAN) so fast that the OS task
       scheduler can't keep up to get exact enough timing.  On an idle	system
       the  roundtrip  times  will be pretty much accurate, but	with more load
       the timing gets less exact.

       To get more exact timing	on a non-idle system, re-nice arping to	-15 or

       # nice -n -15 arping foobar

       This  is	not just an issue with arping, it is with normal ping also (at
       least it	is on my system). But it doesn't show up  as  much  with  ping
       since  arping  packets  (when pinging IP) doesn't traverse the IP stack
       when received and are therefore replied to faster.

       --help Show extended help. Not quite as extensive as this manpage,  but
	      more than	-h.

       -0     Use this option to ping with source IP address Use this
	      when you haven't configured your interface yet.  Note that  this
	      may  get	the  MAC-ping  unanswered.   This  is  an alias	for -S

       -a     Audible ping.

       -A     Only count addresses matching  requested	address	 (This	*WILL*
	      break  most things you do. Only useful if	you are	arpinging many
	      hosts at once. See for	an example).

       -b     Like -0 but source broadcast source  address  (
	      Note that	this may get the arping	unanswered since it's not nor-
	      mal behavior for a host.

       -B     Use instead of host if you want to address

       -c count
	      Only send	count requests.

       -C count
	      Only wait	for count replies, regardless of -c and	-w.

       -d     Find duplicate replies. Exit with	1 if there  are	 answers  from
	      two different MAC	addresses.

       -D     Display  answers	as  exclamation	 points	and missing packets as
	      dots.  Like flood	ping on	a Cisco.

       -e     Like -a but beep when there is no	reply.

       -F     Don't try	to be smart about the interface	 name.	Even  if  this
	      switch is	not given, -i disables this smartness.

       -g group
	      setgid() to this group instead of	the nobody group.

       -h     Displays a help message and exits.

       -i interface
	      Don't guess, use the specified interface.

       -m type
	      Type  of	timestamp  to  use for incoming	packets.  Use -vv when
	      pinging to list available	ones.

       -p     Turn on promiscious mode on interface, use  this	if  you	 don't
	      "own" the	MAC address you	are using.

       -P     Send ARP replies instead of requests. Useful with	-U.

       -q     Does not display messages, except	error messages.

       -Q priority
	      802.1p  priority	to  set.  Should be used with 802.1Q tag (-V).
	      Defaults to 0.

       -r     Raw output: only the MAC/IP address is displayed for each	reply.

       -R     Raw output: Like -r but shows "the other one", can  be  combined
	      with -r.

       -s MAC Set source MAC address. You may need to use -p with this.

       -S IP  Like  -b and -0 but with set source address.  Note that this may
	      get the arping unanswered	if the target does not have routing to
	      the  IP.	If you don't own the IP	you are	using, you may need to
	      turn on promiscious mode on the interface	(with -p).  With  this
	      switch  you can find out what IP-address a host has without tak-
	      ing an IP-address	yourself.

       -t MAC Set target MAC address to	use when pinging IP address.

       -T IP  Use -T as	target address when pinging MACs that won't respond to
	      a	broadcast ping but perhaps to a	directed broadcast.


	      To check the address of MAC-A, use knowledge of MAC-B and	IP-B.

	      $	arping -S <IP-B> -s <MAC-B> -p <MAC-A>

       -u     Show index=received/sent instead of just index=received when
	      pinging MACs.

       -U     Send unsolicited ARP. This sets the destination MAC address in
	      the ARP frame to the broadcast address. Unsolicited ARP is used
	      to update	the neighbours'	ARP caches.


	      $	arping -i <interface> -U <interface IP>

       -v     Verbose output. Use twice	for more messages.

       -V vlan
	      VLAN tag to set. Defaults	to no VLAN tag.

       -w sec Specify a	timeout	before ping exits regardless of	how many packets have been sent	or received.

       -W sec Time to wait between pings.

       # arping	-c 3
       60 bytes	from 00:11:85:4c:01:01 ( index=0 time=13.910 msec
       60 bytes	from 00:11:85:4c:01:01 ( index=1 time=13.935 msec
       60 bytes	from 00:11:85:4c:01:01 ( index=2 time=13.944 msec

       ---	statistics ---
       3 packets transmitted, 3	packets	received,   0% unanswered

       # arping	-c 3 00:11:85:4c:01:01
       ARPING 00:11:85:4c:01:01
       60 bytes	from (00:11:85:4c:01:01): icmp_seq=0 time=13.367 msec
       60 bytes	from (00:11:85:4c:01:01): icmp_seq=1 time=13.929 msec
       60 bytes	from (00:11:85:4c:01:01): icmp_seq=2 time=13.929 msec

       --- 00:11:85:4c:01:01 statistics	---
       3 packets transmitted, 3	packets	received,   0% unanswered

       # arping	-C 2 -c	10 -r

       You have	to use -B instead of arpinging,	and -b instead
       of -S This is libnets fault.

       ping(8),	arp(8),	rarp(8)

       Arping was written by Thomas Habets <>.

       git clone

arping				21th June, 2003			     arping(8)


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