arp(8c)arp(8c)Namearp - address resolution display and control
Syntaxarp-a [vmunix] [kmem]
arp [-d] hostname
arp-s hostname ether_addr [temp] [pub] [trail]
The program displays and modifies the Internet-to-Ethernet address
translation tables used by the address resolution protocol
The hostname is the name of the host system for which information will
be displayed or modified.
With no flags, the program displays the current ARP entry for hostname.
Options-a Displays current Address Resolution Protocol (ARP) entries from
the specified name list and core files (next arguments). If not
specified, uses and respectively.
-d Deletes the entry for the host specified by name (next argument).
-f Reads information from the specified file (next argument) and mod‐
ifies entries accordingly. Entries in the file should be of the
following form, with argument meanings as given previously:
hostname ether_addr [ temp ] [ pub ] [ trail ]
-s Creates an ARP entry for the host called hostname with the Ether‐
net address ether_addr. The Ethernet address is given as six
hexadecimal bytes separated by colons. The entry will be perma‐
nent unless the word temp is given in the command. If the word
pub is given, the entry will be published. That is, the system
will act as an ARP server, responding to requests for hostname
even though the host address is not its own. The word trail indi‐
cates that trailer encapsulations may be sent to this host.
See Alsoarp(4p), ifconfig(8c)arp(8c)