arp —
address resolution display and
control
arp |
-s hostname ether_addr
[temp] [pub] |
The arp program 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 all of the current ARP entries.
-d- A super-user may delete an entry for the host called
hostname with the
-d
flag.
-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.
-f- Causes 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.
The arp command appeared in
4.3BSD.