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32 .\" @(#)arp.8 8.1 (Berkeley) 6/6/93
33 .\" $FreeBSD: src/usr.sbin/arp/arp.8,v 1.8.2.11 2003/03/11 21:13:48 trhodes Exp $
34 .\" $DragonFly: src/usr.sbin/arp/arp.8,v 1.3 2006/01/19 22:19:31 dillon Exp $
41 .Nd address resolution display and control
58 .Fl s Ar hostname ether_addr
62 .Fl S Ar hostname ether_addr
70 utility displays and modifies the Internet-to-Ethernet address translation
71 tables used by the address resolution protocol
73 With no flags, the program displays the current
77 The host may be specified by name or by number,
78 using Internet dot notation.
81 .Bl -tag -width indent
83 The program displays or deletes all of the current
87 On SMP systems the route table is replicated. This option allows
88 the route table for a specific cpu to be accessed and exists
89 primarily for debugging purposes.
91 A super-user may delete an entry for the host called
98 keyword is specified, only the
102 for this host will be deleted.
106 flag may be combined with the
108 flag to delete all entries.
110 Show network addresses as numbers (normally
112 attempts to display addresses symbolically).
113 .It Fl s Ar hostname ether_addr
116 entry for the host called
118 with the Ethernet address
120 The Ethernet address is given as six hex bytes separated by colons.
121 The entry will be permanent unless the word
123 is given in the command.
126 is given, the entry will be
128 i.e., this system will
132 responding to requests for
134 even though the host address is not its own.
139 in which case the interfaces on this host will be examined,
140 and if one of them is found to occupy the same subnet, its
141 Ethernet address will be used.
144 keyword is also specified, this will create a
145 .Dq "published (proxy only)"
147 This type of entry is created automatically if
149 detects that a routing table entry for
152 .It Fl S Ar hostname ether_addr
157 entry for this host will be deleted first.
161 to be read and multiple entries to be set in the
164 in the file should be of the form
166 .Bd -ragged -offset indent -compact
167 .Ar hostname ether_addr
172 with argument meanings as given above.
173 Leading whitespace and empty lines are ignored.
176 character will mark the rest of the line as a comment.