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arp - address resolution display and control
arp hostname
arp -a
arp -d hostname
arp -s hostname ether_address [ temp ] [ pub ]
The arp command displays and modifies the tables that the
address resolution protocol uses to translate between Internet
and Ethernet addresses.
With no flags, arp displays the current ARP entry for host_name.
The host may be specified by name or by number, using
Internet dot notation.
- -a
- Displays all of the current ARP entries.
- -d
- Deletes an entry for the host called hostname.
- -s
- Creates an ARP entry for the host called hostname with
the Ethernet address ether_address. The Ethernet
address is given as six hex bytes separated by colons.
The entry will be permanent if the words following -s
includes the keyword temp. Temporary entries that consist
of a complete Internet address and a matching Ethernet
address are flushed from the arp table if they
haven't been referenced in the past 20 minutes. A permanent
entry is not flushed.
If the words following -s include the keyword pub, 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.
In takeover mode, each filer in a cluster maintains its own
ARP table. You can make changes to the ARP table on the live
filer, or your can make changes to the ARP table on the
failed filer using the arp command in partner mode. However,
the changes you make in partner mode are lost after a
giveback.
na_ifconfig(1), na_partner(1), RFC1483.
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