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.\" @(#)arp.8 8.1 (Berkeley) 6/6/93 33.\" 34.Dd June 6, 1993 35.Dt ARP 8 36.Os BSD 4.3 37.Sh NAME 38.Nm arp 39.Nd address resolution display and control 40.Sh SYNOPSIS 41.Nm arp 42.Ar hostname 43.Nm arp 44.Fl a 45.Nm arp 46.Fl d Ar hostname 47.Nm arp 48.Fl s Ar hostname ether_addr 49.Op Ar temp 50.Op Ar pub 51.Nm arp 52.Fl f Ar filename 53.Sh DESCRIPTION 54The 55.Nm arp 56program displays and modifies the Internet-to-Ethernet address translation 57tables used by the address resolution protocol 58.Pq Xr arp 4 . 59With no flags, the program displays the current 60.Tn ARP 61entry for 62.Ar hostname . 63The host may be specified by name or by number, 64using Internet dot notation. 65.Pp 66Available options: 67.Bl -tag -width Ds 68.It Fl a 69The program displays all of the current 70.Tn ARP 71entries. 72.It Fl d 73A super-user may delete an entry for the host called 74.Ar hostname 75with the 76.Fl d 77flag. 78.It Fl s Ar hostname ether_addr 79Create an 80.Tn ARP 81entry for the host called 82.Ar hostname 83with the Ethernet address 84.Ar ether_addr . 85The Ethernet address is given as six hex bytes separated by colons. 86The entry will be permanent unless the word 87.Ar temp 88is given in the command. 89If the word 90.Ar pub 91is given, the entry will be "published"; i.e., this system will 92act as an 93.Tn ARP 94server, 95responding to requests for 96.Ar hostname 97even though the host address is not its own. 98.It Fl f 99Causes the file 100.Ar filename 101to be read and multiple entries to be set in the 102.Tn ARP 103tables. Entries 104in the file should be of the form 105.Pp 106.Bd -filled -offset indent -compact 107.Ar hostname ether_addr 108.Op Ar temp 109.Op Ar pub 110.Ed 111.Pp 112with argument meanings as given above. 113.El 114.Sh SEE ALSO 115.Xr inet 3 , 116.Xr arp 4 , 117.Xr ifconfig 8 118.Sh HISTORY 119The 120.Nm 121command appeared in 122.Bx 4.3 . 123