1.\" $NetBSD: arp.8,v 1.14 2002/01/22 01:35:39 enami Exp $ 2.\" 3.\" Copyright (c) 1985, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" from: @(#)arp.8 8.2 (Berkeley) 4/27/95 35.\" 36.Dd April 27, 1995 37.Dt ARP 8 38.Os 39.Sh NAME 40.Nm arp 41.Nd address resolution display and control 42.Sh SYNOPSIS 43.Nm 44.Op Fl n 45.Ar hostname 46.Nm "" 47.Op Fl nv 48.Fl a 49.Nm "" 50.Op Fl v 51.Fl d 52.Op Fl a | Ar hostname 53.Nm "" 54.Fl s Ar hostname ether_addr 55.Op Ar temp 56.Op Ar pub 57.Nm "" 58.Fl f Ar filename 59.Sh DESCRIPTION 60The 61.Nm 62program displays and modifies the Internet-to-Ethernet address translation 63tables used by the address resolution protocol 64.Pq Xr arp 4 . 65With no flags, the program displays the current 66.Tn ARP 67entry for 68.Ar hostname . 69The host may be specified by name or by number, 70using Internet dot notation. 71.Pp 72Available options: 73.Bl -tag -width Ds 74.It Fl a 75The program displays all of the current 76.Tn ARP 77entries. 78.It Fl d 79A super-user may delete an entry for the host called 80.Ar hostname 81with the 82.Fl d 83flag. If used with 84.Fl a 85instead of a 86.Ar hostname , 87it will delete all arp entries. 88.It Fl n 89Show network addresses as numbers (normally 90.Nm 91attempts to display addresses symbolically). 92.It Fl s Ar hostname ether_addr 93Create an 94.Tn ARP 95entry for the host called 96.Ar hostname 97with the Ethernet address 98.Ar ether_addr . 99The Ethernet address is given as six hex bytes separated by colons. 100The entry will be permanent unless the word 101.Ar temp 102is given in the command. 103If the word 104.Ar pub 105is given, the entry will be "published"; i.e., this system will 106act as an 107.Tn ARP 108server, 109responding to requests for 110.Ar hostname 111even though the host address is not its own. 112.It Fl f 113Causes the file 114.Ar filename 115to be read and multiple entries to be set in the 116.Tn ARP 117tables. Entries 118in the file should be of the form 119.Pp 120.Bd -filled -offset indent -compact 121.Ar hostname ether_addr 122.Op Ar temp 123.Op Ar pub 124.Ed 125.Pp 126with argument meanings as given above. 127.It Fl v 128Display verbose information when adding or deleting 129.Tn ARP 130entries. 131.El 132.Sh SEE ALSO 133.Xr inet 3 , 134.Xr arp 4 , 135.Xr ifconfig 8 136.Sh HISTORY 137The 138.Nm 139command appeared in 140.Bx 4.3 . 141