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ARP(8)			  BSD System Manager's Manual			ARP(8)

     arp -- address resolution display and control

     arp [-n] [-i interface] hostname
     arp [-n] [-i interface] -a
     arp -d hostname [pub]
     arp -d -a
     arp -s hostname ether_addr	[temp] [pub [only]]
     arp -S hostname ether_addr	[temp] [pub [only]]
     arp -f filename

     The arp utility displays and modifies the Internet-to-Ethernet address
     translation tables	used by	the address resolution protocol	(arp(4)).
     With no flags, the	program	displays the current ARP entry for hostname.
     The host may be specified by name or by number, using Internet dot	nota-

     Available options:

     -a	     The program displays or deletes all of the	current	ARP entries.

     -d	     A super-user may delete an	entry for the host called hostname
	     with the -d flag.	If the pub keyword is specified, only the
	     "published" ARP entry for this host will be deleted.

	     Alternatively, the	-d flag	may be combined	with the -a flag to
	     delete all	entries.

     -i	interface
	     Limit the operation scope to the ARP entries on interface.	 Ap-
	     plicable to the display operations	only.

     -n	     Show network addresses as numbers (normally arp attempts to dis-
	     play addresses symbolically).

     -s	hostname ether_addr
	     Create an ARP entry for the host called hostname with the Ether-
	     net address ether_addr.  The Ethernet address is given as six hex
	     bytes separated by	colons.	 The entry will	be permanent unless
	     the word temp is given in the command.  If	the word pub is	given,
	     the entry will be "published"; i.e., this system will act as an
	     ARP server, responding to requests	for hostname even though the
	     host address is not its own.  In this case	the ether_addr can be
	     given as auto in which case the interfaces	on this	host will be
	     examined, and if one of them is found to occupy the same subnet,
	     its Ethernet address will be used.	 If the	only keyword is	also
	     specified,	this will create a "published (proxy only)" entry.
	     This type of entry	is created automatically if arp	detects	that a
	     routing table entry for hostname already exists.

     -S	hostname ether_addr
	     Is	just like -s except any	existing ARP entry for this host will
	     be	deleted	first.

     -f	filename
	     Cause the file filename to	be read	and multiple entries to	be set
	     in	the ARP	tables.	 Entries in the	file should be of the form

		   hostname ether_addr [temp] [pub]

	     with argument meanings as given above.  Leading whitespace	and
	     empty lines are ignored.  A `#' character will mark the rest of
	     the line as a comment.

     inet(3), arp(4), ifconfig(8)

     The arp utility appeared in 4.3BSD.

BSD				 June 6, 1993				   BSD


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