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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 $
36 .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 On SMP systems the route table is replicated. This option allows
86 the route table for a specific cpu to be accessed and exists
87 primarily for debugging purposes.
89 A super-user may delete an entry for the host called
96 keyword is specified, only the
100 for this host will be deleted.
104 flag may be combined with the
106 flag to delete all entries.
107 .It Fl i Ar interface
108 Limit the operation scope to the
112 Applicable only to the following operations:
113 display one, display all, delete all.
115 Show network addresses as numbers (normally
117 attempts to display addresses symbolically).
118 .It Fl s Ar hostname ether_addr
121 entry for the host called
123 with the Ethernet address
125 The Ethernet address is given as six hex bytes separated by colons.
126 The entry will be permanent unless the word
128 is given in the command.
131 is given, the entry will be
133 i.e., this system will
137 responding to requests for
139 even though the host address is not its own.
144 in which case the interfaces on this host will be examined,
145 and if one of them is found to occupy the same subnet, its
146 Ethernet address will be used.
149 keyword is also specified, this will create a
150 .Dq "published (proxy only)"
152 This type of entry is created automatically if
154 detects that a routing table entry for
157 .It Fl S Ar hostname ether_addr
162 entry for this host will be deleted first.
166 to be read and multiple entries to be set in the
169 in the file should be of the form
171 .Bd -ragged -offset indent -compact
172 .Ar hostname ether_addr
177 with argument meanings as given above.
178 Leading whitespace and empty lines are ignored.
181 character will mark the rest of the line as a comment.