ARP(8C)ARP(8C)NAMEarp - address resolution display and control
SYNOPSISarp hostname
arp-a [ mach ] [ kmem ]
arp-d hostname
arp-s hostname ether_addr [ temp ] [ pub ] [ trail ]
arp-f filename
arp-e filename
DESCRIPTION
The arp program displays and modifies the Internet-to-Ethernet address
translation tables used by the address resolution protocol (arp(4p)).
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. With the -a flag, the program displays all of the current
ARP entries by reading the table from the file kmem (default /dev/kmem)
based on the kernel file mach (default /mach).
With the -d flag, a super-user may delete an entry for the host called
hostname.
The -s flag is given to 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. The word trail indicates that trailer
encapsulations may be sent to this host.
The -f flag 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 ] [ trail ]
with argument meanings as given above.
The -e flag 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
ether_addr hostname [ temp ] [ pub ] [ trail ]
with argument meanings as given above. Note that this flag is the same
as the -f flag except that the first two fields in the file to be read
are reversed. This format is suitable for reading the /etc/ethers file
used by the yellow pages.
SEE ALSOinet(3N), arp(4P), ethers(5), ifconfig(8C)4.3 Berkeley Distribution September 15, 1987 ARP(8C)