1.\" Copyright (c) 1985, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" from: @(#)arp.8 8.1 (Berkeley) 6/6/93 33.\" $Id: arp.8,v 1.5 1994/09/17 00:54:42 mycroft Exp $ 34.\" 35.Dd June 6, 1993 36.Dt ARP 8 37.Os BSD 4.3 38.Sh NAME 39.Nm arp 40.Nd address resolution display and control 41.Sh SYNOPSIS 42.Nm arp 43.Ar hostname 44.Nm arp 45.Fl a 46.Nm arp 47.Fl d Ar hostname 48.Nm arp 49.Fl s Ar hostname ether_addr 50.Op Ar temp 51.Op Ar pub 52.Nm arp 53.Fl f Ar filename 54.Sh DESCRIPTION 55The 56.Nm arp 57program displays and modifies the Internet-to-Ethernet address translation 58tables used by the address resolution protocol 59.Pq Xr arp 4 . 60With no flags, the program displays the current 61.Tn ARP 62entry for 63.Ar hostname . 64The host may be specified by name or by number, 65using Internet dot notation. 66.Pp 67Available options: 68.Bl -tag -width Ds 69.It Fl a 70The program displays all of the current 71.Tn ARP 72entries. 73.It Fl d 74A super-user may delete an entry for the host called 75.Ar hostname 76with the 77.Fl d 78flag. 79.It Fl s Ar hostname ether_addr 80Create an 81.Tn ARP 82entry for the host called 83.Ar hostname 84with the Ethernet address 85.Ar ether_addr . 86The Ethernet address is given as six hex bytes separated by colons. 87The entry will be permanent unless the word 88.Ar temp 89is given in the command. 90If the word 91.Ar pub 92is given, the entry will be "published"; i.e., this system will 93act as an 94.Tn ARP 95server, 96responding to requests for 97.Ar hostname 98even though the host address is not its own. 99.It Fl f 100Causes the file 101.Ar filename 102to be read and multiple entries to be set in the 103.Tn ARP 104tables. Entries 105in the file should be of the form 106.Pp 107.Bd -filled -offset indent -compact 108.Ar hostname ether_addr 109.Op Ar temp 110.Op Ar pub 111.Ed 112.Pp 113with argument meanings as given above. 114.El 115.Sh SEE ALSO 116.Xr inet 3 , 117.Xr arp 4 , 118.Xr ifconfig 8 119.Sh HISTORY 120The 121.Nm 122command appeared in 123.Bx 4.3 . 124