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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 $
40 .Nd address resolution display and control
55 .Fl s Ar hostname ether_addr
59 .Fl S Ar hostname ether_addr
67 utility displays and modifies the Internet-to-Ethernet address translation
68 tables used by the address resolution protocol
70 With no flags, the program displays the current
74 The host may be specified by name or by number,
75 using Internet dot notation.
78 .Bl -tag -width indent
80 The program displays or deletes all of the current
84 A super-user may delete an entry for the host called
91 keyword is specified, only the
95 for this host will be deleted.
99 flag may be combined with the
101 flag to delete all entries.
103 Show network addresses as numbers (normally
105 attempts to display addresses symbolically).
106 .It Fl s Ar hostname ether_addr
109 entry for the host called
111 with the Ethernet address
113 The Ethernet address is given as six hex bytes separated by colons.
114 The entry will be permanent unless the word
116 is given in the command.
119 is given, the entry will be
121 i.e., this system will
125 responding to requests for
127 even though the host address is not its own.
132 in which case the interfaces on this host will be examined,
133 and if one of them is found to occupy the same subnet, its
134 Ethernet address will be used.
137 keyword is also specified, this will create a
138 .Dq "published (proxy only)"
140 This type of entry is created automatically if
142 detects that a routing table entry for
145 .It Fl S Ar hostname ether_addr
150 entry for this host will be deleted first.
154 to be read and multiple entries to be set in the
157 in the file should be of the form
159 .Bd -ragged -offset indent -compact
160 .Ar hostname ether_addr
165 with argument meanings as given above.
166 Leading whitespace and empty lines are ignored.
169 character will mark the rest of the line as a comment.