arp man page on SmartOS

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ARP(1M)								       ARP(1M)

       arp - address resolution display and control

       arp hostname

       arp -a [-n]

       arp -d hostname

       arp -f filename

       arp -s hostname ether_address [temp] [pub] [trail]

       The  arp	 program  displays  and	 modifies  the Internet-to-MAC address
       translation  tables  used  by  the  address  resolution	protocol  (see

       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

       Options	that modify the ARP translation tables (-d, -f, and -s) can be
       used only when the invoked command is granted the sys_net_config privi‐
       lege. See privileges(5).

	     Display  all  of  the current ARP entries. The definition for the
	     flags in the table are:

		  Unverified; this is a local IP  address  that	 is  currently
		  undergoing Duplicate Address Detection. ARP will not respond
		  to requests for this address until Duplicate Address	Detec‐
		  tion completes.

		  Old;	this  entry  is aging away. If IP requests it again, a
		  new ARP query will be generated.  This  state	 is  used  for
		  detecting peer address changes.

		  Delayed; periodic address defense and conflict detection was
		  unable to send a packet due to internal network  use	limits
		  for  non-traffic-related  messages (100 packets per hour per
		  interface). This occurs only on interfaces with  very	 large
		  numbers of aliases.

		  Authority;   this  machine  is  authoritative	 for  this  IP
		  address. ARP will not accept updates from other machines for
		  this entry.

		  Local;  this	is a local IP address configured on one of the
		  machine's logical interfaces. ARP will defend	 this  address
		  if another node attempts to claim it.

		  Mapping; only used for the multicast entry for

		  Publish;  includes  IP  address  for	the  machine  and  the
		  addresses that have explicitly been added by the -s  option.
		  ARP will respond to ARP requests for this address.

		  Static; entry cannot be changed by learned information. This
		  indicates that the permanent flag was used when creating the

		  Unresolved; waiting for ARP response.

	     You can use the -n option with the -a option to disable the auto‐
	     matic numeric IP address-to-name translation. Use arp -an or  arp
	     -na to display numeric IP addresses. The arp -a option is equiva‐
	     lent to:

	       # netstat -p -f inet

	     ...and -an and -na are equivalent to:

	       # netstat -pn -f inet

	     Delete an entry for the host called hostname.

	     Note that ARP entries for IPMP (IP Network Multipathing) data and
	     test  addresses  are  managed  by	the  kernel and thus cannot be

	     Read the file named filename and set multiple entries in the  ARP
	     tables. Entries in the file should be of the form:

	       hostname MACaddress [temp] [pub] [trail] [permanent]

	     See the -s option for argument definitions.

	     Create  an	 ARP  entry  for the host called hostname with the MAC
	     address MACaddress. For example, an Ethernet address is given  as
	     six  hexadecimal bytes separated by colons. The entry will not be
	     subject to deletion by aging unless the word temp is specified in
	     the command. If the word pub is specified, the entry will be pub‐
	     lished, which means that this system will respond to ARP requests
	     for  hostname  even  though the hostname is not its own. The word
	     permanent indicates that the system will not accept  MAC  address
	     changes for hostname from the network.

	     Solaris  does  not	 implement trailer encapsulation, and the word
	     trail is accepted on entries for compatibility only.

	     arp -s can be used for a limited form of proxy ARP when a host on
	     one  of  the directly attached networks is not physically present
	     on a subnet.  Another machine can then be configured  to  respond
	     to ARP requests using arp -s. This is useful in certain SLIP con‐

	     Non-temporary proxy ARP entries for an IPMP  (IP  Network	Multi‐
	     pathing)  group are automatically managed by the kernel. Specifi‐
	     cally, if the hardware address in an entry matches	 the  hardware
	     address  of  an IP interface in an IPMP group, and the IP address
	     is not local to the system, this will  be	regarded  as  an  IPMP
	     proxy  ARP entry. This entry will have its hardware address auto‐
	     matically adjusted in order to keep the IP address	 reachable  so
	     long as the IPMP group has not entirely failed.

	     ARP  entries  must be consistent across an IPMP group. Therefore,
	     ARP entries cannot be associated with  individual	underlying  IP
	     interfaces	 in an IPMP group, and must instead be associated with
	     the corresponding IPMP IP interface.

	     Note that ARP entries for IPMP data and test addresses  are  man‐
	     aged by the kernel and thus cannot be changed.

       ifconfig(1M), netstat(1M), attributes(5), privileges(5), arp(7P)

				  Jan 5, 2009			       ARP(1M)

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