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28 .\" @(#)arp.8 8.1 (Berkeley) 6/6/93
29 .\" $FreeBSD: src/usr.sbin/arp/arp.8,v 1.8.2.11 2003/03/11 21:13:48 trhodes Exp $
30 .\" $DragonFly: src/usr.sbin/arp/arp.8,v 1.3 2006/01/19 22:19:31 dillon Exp $
37 .Nd address resolution display and control
54 .Fl s Ar hostname ether_addr
58 .Fl S Ar hostname ether_addr
66 utility displays and modifies the Internet-to-Ethernet address translation
67 tables used by the address resolution protocol
69 With no flags, the program displays the current
73 The host may be specified by name or by number,
74 using Internet dot notation.
77 .Bl -tag -width indent
79 The program displays or deletes all of the current
83 On SMP systems the route table is replicated. This option allows
84 the route table for a specific cpu to be accessed and exists
85 primarily for debugging purposes.
87 A super-user may delete an entry for the host called
94 keyword is specified, only the
98 for this host will be deleted.
102 flag may be combined with the
104 flag to delete all entries.
106 Show network addresses as numbers (normally
108 attempts to display addresses symbolically).
109 .It Fl s Ar hostname ether_addr
112 entry for the host called
114 with the Ethernet address
116 The Ethernet address is given as six hex bytes separated by colons.
117 The entry will be permanent unless the word
119 is given in the command.
122 is given, the entry will be
124 i.e., this system will
128 responding to requests for
130 even though the host address is not its own.
135 in which case the interfaces on this host will be examined,
136 and if one of them is found to occupy the same subnet, its
137 Ethernet address will be used.
140 keyword is also specified, this will create a
141 .Dq "published (proxy only)"
143 This type of entry is created automatically if
145 detects that a routing table entry for
148 .It Fl S Ar hostname ether_addr
153 entry for this host will be deleted first.
157 to be read and multiple entries to be set in the
160 in the file should be of the form
162 .Bd -ragged -offset indent -compact
163 .Ar hostname ether_addr
168 with argument meanings as given above.
169 Leading whitespace and empty lines are ignored.
172 character will mark the rest of the line as a comment.