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ARP(8)                 DragonFly System Manager's Manual                ARP(8)


NAME

     arp -- address resolution display and control


SYNOPSIS

     arp [-n] [-c cpu] [-i interface] hostname
     arp [-n] [-c cpu] [-i interface] -a
     arp -d hostname [pub]
     arp -d [-i interface] -a
     arp -s hostname ether_addr [temp] [pub [only]]
     arp -S hostname ether_addr [temp] [pub [only]]
     arp -f filename


DESCRIPTION

     The arp utility displays and modifies the Internet-to-Ethernet address
     translation tables used by the address resolution protocol (arp(4)).
     With no flags, the program displays the current ARP entry for hostname.
     The host may be specified by name or by number, using Internet dot
     notation.

     Available options:

     -a      The program displays or deletes all of the current ARP entries.

     -c cpu  On SMP systems the route table is replicated.  This option allows
             the route table for a specific cpu to be accessed and exists
             primarily for debugging purposes.

     -d      A super-user may delete an entry for the host called hostname
             with the -d flag.  If the pub keyword is specified, only the
             ``published'' ARP entry for this host will be deleted.

             Alternatively, the -d flag may be combined with the -a flag to
             delete all entries.

     -i interface
             Limit the operation scope to the ARP entries on interface.
             Applicable only to the following operations: display one, display
             all, delete all.

     -n      Show network addresses as numbers (normally arp attempts to
             display addresses symbolically).

     -s hostname ether_addr
             Create an ARP entry for the host called hostname with the
             Ethernet address ether_addr.  The Ethernet address is given as
             six hex bytes separated by colons.  The entry will be permanent
             unless the word temp is given in the command.  If the word pub is
             given, the entry will be ``published''; i.e., this system will
             act as an ARP server, responding to requests for hostname even
             though the host address is not its own.  In this case the
             ether_addr can be given as auto in which case the interfaces on
             this host will be examined, and if one of them is found to occupy
             the same subnet, its Ethernet address will be used.  If the only
             keyword is also specified, this will create a ``published (proxy
             only)'' entry.  This type of entry is created automatically if
             arp detects that a routing table entry for hostname already
             exists.

     -S hostname ether_addr
             Is just like -s except any existing ARP entry for this host will
             be deleted first.

     -f filename
             Cause the file filename to be read and multiple entries to be set
             in the ARP tables.  Entries in the file should be of the form

                   hostname ether_addr [temp] [pub]

             with argument meanings as given above.  Leading whitespace and
             empty lines are ignored.  A `#' character will mark the rest of
             the line as a comment.


SEE ALSO

     inet(3), arp(4), ifconfig(8)


HISTORY

     The arp utility appeared in 4.3BSD.

DragonFly 5.3                  October 25, 2018                  DragonFly 5.3

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