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.
If the
proxy
keyword is specified, only the published
``proxy only''
ARP
entry
for this host will be deleted.
If used with
-a
instead of a
hostname,
it will delete all arp entries.
-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 described below.
-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. If the word
proxy
is also given, the published entry will be a
``proxy only''
entry.
-v
Display verbose information when adding or deleting
ARP
entries.