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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 1.2 2003/06/17 04:29:52 dillon Exp $
41 .Nd address resolution display and control
56 .Fl s Ar hostname ether_addr
60 .Fl S Ar hostname ether_addr
68 utility displays and modifies the Internet-to-Ethernet address translation
69 tables used by the address resolution protocol
71 With no flags, the program displays the current
75 The host may be specified by name or by number,
76 using Internet dot notation.
79 .Bl -tag -width indent
81 The program displays or deletes all of the current
85 A super-user may delete an entry for the host called
92 keyword is specified, only the
96 for this host will be deleted.
100 flag may be combined with the
102 flag to delete all entries.
104 Show network addresses as numbers (normally
106 attempts to display addresses symbolically).
107 .It Fl s Ar hostname ether_addr
110 entry for the host called
112 with the Ethernet address
114 The Ethernet address is given as six hex bytes separated by colons.
115 The entry will be permanent unless the word
117 is given in the command.
120 is given, the entry will be
122 i.e., this system will
126 responding to requests for
128 even though the host address is not its own.
133 in which case the interfaces on this host will be examined,
134 and if one of them is found to occupy the same subnet, its
135 Ethernet address will be used.
138 keyword is also specified, this will create a
139 .Dq "published (proxy only)"
141 This type of entry is created automatically if
143 detects that a routing table entry for
146 .It Fl S Ar hostname ether_addr
151 entry for this host will be deleted first.
155 to be read and multiple entries to be set in the
158 in the file should be of the form
160 .Bd -ragged -offset indent -compact
161 .Ar hostname ether_addr
166 with argument meanings as given above.
167 Leading whitespace and empty lines are ignored.
170 character will mark the rest of the line as a comment.