ARP(8c,C) AIX TCP/IP User's Guide ARP(8c,C)
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arp
PURPOSE
Performs address resolution display and control.
SYNTAX
+--- hostname ---|
|
| +--------+ +--------+
|--- -a ---| |---| |---|
| +- unix -+ +- kmem -+
|
arp ---+--- -d --- hostname ---|
|
| + ether +
| +-| |- hostname - ether_addr ---------------+
| | + 802.3 + |
|--- -s -| +-------------+ |-...
| +- 802.5 - hostname - token_addr -| |-+
| + token_route +
|
+--- -f --- filename ---|
+------+ +-----+ +-------+
...-| |--| |--| |--|
+ temp + + pub + + trail +
DESCRIPTION
The arp command displays and modifies the Internet-to-Ethernet address
translation tables used by the Address Resolution Protocol (ARP). With no
flags, the program displays the current arp entry for hostname, as specified in
/etc/hosts. The host may be specified by name or by number using Internet dot
notation.
FLAGS
The arp command options are:
Processed October 29, 1990 ARP(8c,C) 1
ARP(8c,C) AIX TCP/IP User's Guide ARP(8c,C)
-a Displays all of the current arp entries by reading the table from the file,
kmem, (default /dev/kmem) based on the kernel file unix (default /unix).
-d Deletes an entry for the host called hostname for the superuser.
-f Causes the file filename to be read and multiple entries to be set in the
arp tables. Entries in the file should be in the following form:
hostname ether_addr [temp] [pub][trail]
The Ethernet address is given as 6 hex bytes separated by colons. The
entry is permanent unless the word temp is given in the commands. If the
word pub is given, the entry is published. The word trail indicates that
trailer encapsulations can also be sent to this host.
-s Creates an arp entry for the host called hostname with the Ethernet
address, ether-addr or the Token-Ring address token-addr. The Ethernet or
Token-Ring address is given as 6 hex bytes separated by colons. The entry
is permanent unless the word temp is given in the commands. If the word
pub is given, the entry is published. The word trail indicates that
trailer encapsulations can also be sent to this host. The optional
token-route parameter gives the Token-Ring route to the host in a multiple
Token-Ring configuration. The token-route is given as one to nine hex
numbers separated by colons. The hex numbers may be of up to 4 digits
each.
This means that the host accepts data packets of the following format:
[fixed_header] [packet_data] [trailer][additional_header]
By moving the bulk of the network headers to the end of the packet and
preceding them with a trailer needed to help the protocol driver to find
the additional headers, you can improve performance by arranging to move
the data packets to page-aligned boundaries on the host machine.
EXAMPLES
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ARP(8c,C) AIX TCP/IP User's Guide ARP(8c,C)
# arp -a
draco (193.255.2.15) at 0:dd:0:fb:84:0
coins (193.255.2.7) at 0:dd:0:39:a:0
sabik (193.255.2.26) at 0:dd:1:2:0:cc
electra (193.255.2.18) at 0:dd:1:2:0:cd
cups (193.255.2.29) at 0:dd:0:b:69:0
frodo (193.255.2.2) at 2:60:8c:0:34:63
swords (193.255.2.4) at 0:dd:0:84:b8:0
wheels (193.255.2.24) at 0:dd:1:1:3a:bb
merak (193.255.2.16) at 0:dd:1:2:0:cb
spica (193.255.2.8) at 0:dd:1:1:3a:c3
#
# arp swords
swords (193.255.2.4) at 0:dd:0:84:b8:0
#
# arp nonesuch
nonesuch (193.255.1.4) -- no entry
#
RELATED INFORMATION
In this book: "ifconfig"
inet, refer to the AIX Operating System Technical Reference
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