arp.1m (2010 09)

a
arp(1M) arp(1M)
NAME
arp - address resolution display and control
SYNOPSIS
arp hostname
arp -a[n][system ]
arp -a[n] [ system [ core ]]
# PA only
arp
[-d | -D] hostname
arp -f filename
arp -s hostname hw_address [temp][
pub][rif rif_address ]
arp -sfc hostname nport_id
DESCRIPTION
The
arp command displays and modifies the Internet-to-Ethernet and Internet-to-Fibre Channel address
translation tables used by the Address Resolution Protocol (ARP).
Options
arp has the following keyletter options:
hostname Display the current ARP entry for hostname , which must appear in the hostname data-
base (see hosts (4)), or for the DARPA Internet address expressed in Internet standard
‘‘dot’’ notation.
-a[n] Display all current ARP entries by reading the table from /dev/kmem based on the ker-
nel file system (default /stand/vmunix
). On PA systems only: if a core argument is
supplied, read the table from core instead of
/dev/kmem. The -an option provides the
same information as the -a option except that network addresses are not displayed sym-
bolically.
-d If an ARP entry exists for the host called hostname , delete it. This option cannot be used
to delete a permanent ARP entry whose IP address is an interface on the local system.
-D (Not recommended). Delete a permanent ARP entry whose IP address is an interface on
the local system. The removal of such an ARP entry may result in loss or limitation of
network connectivity with remote machines. The local system will no longer respond to
ARP requests for this IP address. Consequently, communication with remote systems is
possible only when that communication is initiated by the local system. This option
should be used with extreme caution.
-f Read file filename and set multiple entries in the ARP tables. Fibre Channel entries in
the file should be of the form:
-sfchostname nport_id
Other entries in the file should be of the form:
hostname hw_address
[
temp]
[pub]
[rif
rif_address ]
The argument meanings are the same as for the
-s option.
-s Create an ARP entry for the host called hostname with the hardware station address
hw_address . The hardware station address is given as six hexadecimal bytes separated
by colons. If an ARP entry already exists for hostname , the existing entry is updated
with the new information.
The entry is permanent unless the word
temp is given in the command.
If the word
pub is specified, the entry is published, which means that this system will act
as an ARP server responding to requests for hostname even though the host address is
not its own.
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1