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ARP(8) NetBSD System Manager's Manual ARP(8)
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arp -- address resolution display and control
arp [-n] hostname
arp [-nv] -a
arp [-v] -d -a
arp [-v] -d hostname [proxy]
arp -s hostname ether_addr [temp] [pub [proxy]]
arp -f filename
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 nota-
The state of the arp entry is shown as a single letter preceded by the
time the state is applicable for:
? Unknown state (should never happen).
-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
-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 dis-
play addresses symbolically).
-s hostname ether_addr
Create an ARP entry for the host called hostname with the Ether-
net 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. In this case the ether_addr can be given
as auto in which case the interfaces on this host will be exam-
ined, and if one of them is found to occupy the same subnet, its
Ethernet address will be used.
-v Display verbose information when adding or deleting ARP entries.
inet(3), arp(4), ifconfig(8)
The arp command appeared in 4.3BSD.
NetBSD 9.99 December 5, 2021 NetBSD 9.99