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28 .\" @(#)arp.8 8.1 (Berkeley) 6/6/93
36 .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 A super-user may delete an entry for the host called
90 keyword is specified, only the
94 for this host will be deleted.
98 flag may be combined with the
100 flag to delete all entries.
101 .It Fl i Ar interface
102 Limit the operation scope to the
106 Applicable to the display operations only.
108 Show network addresses as numbers (normally
110 attempts to display addresses symbolically).
111 .It Fl s Ar hostname ether_addr
114 entry for the host called
116 with the Ethernet address
118 The Ethernet address is given as six hex bytes separated by colons.
119 The entry will be permanent unless the word
121 is given in the command.
124 is given, the entry will be
126 i.e., this system will
130 responding to requests for
132 even though the host address is not its own.
137 in which case the interfaces on this host will be examined,
138 and if one of them is found to occupy the same subnet, its
139 Ethernet address will be used.
142 keyword is also specified, this will create a
143 .Dq "published (proxy only)"
145 This type of entry is created automatically if
147 detects that a routing table entry for
150 .It Fl S Ar hostname ether_addr
155 entry for this host will be deleted first.
159 to be read and multiple entries to be set in the
163 in the file should be of the form
165 .Bd -ragged -offset indent -compact
166 .Ar hostname ether_addr
171 with argument meanings as given above.
172 Leading whitespace and empty lines are ignored.
175 character will mark the rest of the line as a comment.