address resolution display and control
arp -a [ -n ]
arp -d [ -n ] hostname
arp -f [ -n ] filename
arp -s [ -n ] hostname ether_addr
[ temp] [ pub ]
The arp program displays and modifies the
Internet-to-Ethernet address translation table, which is
normally maintained by the address resolution protocol
When hostname is the only argument, arp
displays the current ARP entry for
hostname. The host may be specified by name or by
number, using Internet dot notation (see
Options are interpreted as follows:
If the -n flag is specified, arp will not display
symbolic names, but instead will display
numeric Internet addresses.
Display all of the current ARP entries by reading the table
from the kernel.
Delete an entry for the host whose name is hostname.
(This can be performed only by the root.)
Read the file filename and set multiple entries
in the ARP tables. Entries in the file should be
of the form
hostname ether_addr [ temp ] [ pub ]
with argument meanings as
defined under the -s option.
-s hostname ether_addr [ temp ] [ pub ]
Create an ARP entry for the host whose name is hostname
with the Ethernet address ether_addr.
The Ethernet address is given as six colon-separated, two-digit
hexadecimal numbers. The entry will be permanent unless the argument
temp is specified on the command line.
If pub is specified, the entry will be ``published'':
that is, this system will act as an ARP server,
responding to requests for hostname
even though the host address is not an address of the local host.
Displays the ARP statistics that the kernel maintains;
these may be useful for debugging network problems.
WARNING: arp: info overwritten for IP_address by MAC_address
The source of this error may be:
two or more systems having the same IP address on the local network.
This is likely to be the case if you see the error message
repeated several times on a single system.
Redefine the IP address of one of the systems using the
Network Configuration Manager
changing a network card in a system.
The message should only occur at most once on each of the
other systems connected to the local network.
RFC 826 (STD 37)
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003