|ARP(8)||System Manager's Manual||ARP(8)|
arpprogram displays and modifies the Internet-to-Ethernet address translation tables used by the address resolution protocol (ARP).
arp displays the current ARP entry for
hostname when no optional parameters are supplied.
hostname may be specified by name or by number, using
Internet dot notation.
arp can also be used to send Wake on LAN
(WoL) frames over a local Ethernet network to one or more hosts using their
link layer (hardware) addresses. WoL functionality is generally enabled in a
machine's BIOS and can be used to power on machines from a remote system
without having physical access to them.
The options are as follows:
-dflag may be combined with the
-aflag to delete all entries, with hostname lookups automatically disabled. Only the superuser may delete entries.
-Fis given. Entries in the file should be of the form:
The entry will be static (will not time out) unless the word
temp is given in the command. A static ARP entry
can be overwritten by network traffic, unless the word
permanent is given. If the word
pub is given, 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 its own. This behavior has traditionally
been called proxy ARP.
arpattempts to display addresses symbolically).
-shostname ether_addr [
may be specified with meanings as given above.
If the entry already exists for the given host, it will not be
-F is given.
$ arp -a
Create a permanent entry (one that cannot be overwritten by other network traffic):
# arp -s 10.0.0.2 00:90:27:bb:cc:dd permanent
Create proxy ARP entries on interface fxp0 (MAC address 00:90:27:bb:cc:dd), for IP addresses 18.104.22.168 and 22.214.171.124:
# arp -s 126.96.36.199 00:90:27:bb:cc:dd pub # arp -s 188.8.131.52 00:90:27:bb:cc:dd pub
arpcommand appeared in 4.3BSD. Wake on LAN functionality was added in OpenBSD 4.9.
|September 1, 2011||OpenBSD-5.1|