arp(1m) [posix man page]

arp(1M) 						  System Administration Commands						   arp(1M)

NAME

       arp - address resolution display and control

SYNOPSIS

       arp hostname

       arp -a [-n]

       arp -d hostname

       arp -f filename

       arp -s hostname ether_address [temp] [pub] [trail]

DESCRIPTION

       The arp program displays and modifies the Internet-to-MAC address translation tables used by the address resolution protocol (see arp(7P)).

       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
       notation.

OPTIONS

       -a	Display all of the current ARP entries. The definition for the flags in the table are:

		M	 Mapping; only used for the multicast entry for 224.0.0.0

		P	 Publish; includes IP address for the machine and the addresses that have explicitly been added by the -s option. ARP will
			 respond to ARP requests for this address.

		S	 Static; not learned for the ARP protocol.

		U	 Unresolved; waiting for ARP response.

		You  can  use the -n option with the -a option to disable the automatic numeric IP address-to-name translation. Use arp -an or arp
		-na to display numeric IP addresses.

       -d	Delete an entry for the host called hostname. This option may only be used by the super-user.

       -f	Read the file named filename and set multiple entries in the ARP tables. Entries in the file should be of the form:

		hostname MACaddress [temp] [pub] [trail]

		See the -s option for argument definitions.

       -s	Create an ARP entry for the host called hostname with the MAC address MACaddress.  For example, an Ethernet address  is  given	as
		six  hexadecimal  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. For instance, this system will respond to ARP requests for  hostname  even  though  the
		hostname  is  not its own. The word trail indicates that trailer encapsulations may be sent to this host. arp -s can be used for a
		limited form of proxy ARP when a host on one of the directly attached networks is not physically present on  the  subnet.  Another
		machine can then be configured to respond to ARP requests using arp -s. This is useful in certain SLIP configurations.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ifconfig(1M), arp(7P), attributes(5)

SunOS 5.10							    7 Mar 2003								   arp(1M)

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

NAME

     arp -- address resolution display and control

SYNOPSIS

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

DESCRIPTION

     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
     notation.

     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.  Applicable only to the following operations: display one, display all,
	     delete all.

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

     -s hostname ether_addr
	     Create an ARP entry for the host called hostname with the Ethernet 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 reject keyword is specified the entry will be marked so that traffic to the host will be discarded and the sender will be
	     notified the host is unreachable.	The blackhole keyword is similar in that traffic is discarded but the sender is not notified.
	     These can be used to block external traffic to a host without using a firewall.

     -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] [blackhole | reject] [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.

SEE ALSO

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

HISTORY

     The arp utility appeared in 4.3BSD.

BSD
								 January 31, 2013							       BSD