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from: @(#)arp.8 8.2 (Berkeley) 4/27/95
.Dd January 31, 2006 .Dt ARP 8 .Os .Sh NAME .Nm arp .Nd address resolution display and control .Sh SYNOPSIS .Nm .Op Fl n .Ar hostname .Nm .Op Fl nv .Fl a .Nm .Op Fl v .Fl d .Fl a .Nm .Op Fl v .Fl d Ar hostname .Op Ar proxy .Nm .Fl s Ar hostname ether_addr .Op Ar temp .Op Ar pub Op Ar proxy .Nm .Fl f Ar filename .Sh DESCRIPTION The .Nm program displays and modifies the Internet-to-Ethernet address translation tables used by the address resolution protocol
q Xr arp 4 . With no flags, the program displays the current .Tn ARP entry for .Ar hostname . The host may be specified by name or by number, using Internet dot notation.
p Available options: l -tag -width Ds t Fl a The program displays all of the current .Tn ARP entries. t Fl d A super-user may delete an entry for the host called .Ar hostname with the .Fl d flag. If the .Cm proxy keyword is specified, only the published .Dq proxy only .Tn ARP entry for this host will be deleted. If used with .Fl a instead of a .Ar hostname , it will delete all arp entries. t Fl f Causes the file .Ar filename to be read and multiple entries to be set in the .Tn ARP tables. Entries in the file should be of the form
p d -filled -offset indent -compact .Ar hostname ether_addr .Op Ar temp .Op Ar pub .Ed
p with argument meanings as described below. t Fl n Show network addresses as numbers (normally .Nm attempts to display addresses symbolically). t Fl s Ar hostname ether_addr Create an .Tn ARP entry for the host called .Ar hostname with the Ethernet address .Ar ether_addr . The Ethernet address is given as six hex bytes separated by colons. The entry will be permanent unless the word .Ar temp is given in the command. If the word .Ar pub is given, the entry will be "published"; i.e., this system will act as an .Tn ARP server, responding to requests for .Ar hostname even though the host address is not its own. If the word .Ar proxy is also given, the published entry will be a .Dq proxy only entry. t Fl v Display verbose information when adding or deleting .Tn ARP entries. .El .Sh SEE ALSO .Xr inet 3 , .Xr arp 4 , .Xr ifconfig 8 .Sh HISTORY The .Nm command appeared in x 4.3 .