Need help with IP and MAC addresses Post: 302282353

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learp

learp(8)						      System Manager's Manual							  learp(8)

NAME

       learp - Displays the contents of a LAN-Emulation Address Resolution Protocol (LE-ARP) table

SYNOPSIS

       /usr/sbin/learp [-u unit_number] -a

OPTIONS

       Specifies  a  LE-ARP  cache. The unit number is the same as is displayed by the netstat -i command.  For example: elan0 is unit 0, elan1 is
       unit 1, and so on.

	      If the -u option is not specified, the default unit number is 0.	Displays all entries in the LAN-Emulation Address Resolution  Pro-
	      tocol (LE-ARP) table.

DESCRIPTION

       Each  LAN-Emulation Client interface (displayed as elann in netstat output) has an Address Resolution Protocol (LE-ARP) table that contains
       mappings of 6-byte medium access control (MAC) addresses to 20-byte Asynchronous Transfer Mode (ATM) addresses.	The learp command displays
       the contents of the LE-ARP table.

       Each  LE-ARP  table entry contains the following information: Each MAC address that has been or is being contacted through the ATM-emulated
       LAN.  One of the following state values: AP -- LE-ARP is pending.  The ATM address associated with the MAC address is  not  known.   DE	--
       Delete  of  the LE-ARP cache entry is pending. When there are no more VCs for a LE-ARP entry, it is marked for deletion.  After there is no
       activity for 5 minutes (age periond), the entry is removed for the cache.  FD -- Forward Direct.  Packets flowing to  the  destination  are
       using  the  data-direct VC.  FL -- Flush is pending.  A new VC has been established with the remote node and the broadcast channel is being
       flushed so packets flowing on the new VC will not arrive out of order.  VP -- Virtual Channel (VC) setup is pending.  The  ATM  address	is
       known,  but no VC is established with the remote node.  If known, the 20-byte ATM address associated with the MAC address.  One of the fol-
       lowing flags: R -- Remote entry.  The MAC address is on a legacy (that is, Ethernet) network on the back side of an ATM edge device.  P	--
       Permanent  entry.   The	LE-ARP entry is permanent.  If known, this is the Virtual Path Identifier (VPI) and the Virtual Channel Identifier
       (VCI) of the data-direct VC used by packets destined to the MAC address.  Many MAC addresses may use the same VC.

EXAMPLES

       The following example shows the output of a learp -a command in which the LE-ARP cache contains five entries: # learp -a le-arp cache  con-
       tains 5 entries.
	  MAC  Address	   State	     ATM  Address		    Flags  VPI/VCI  08-00-2b-01-01-01  (AP) pending 08-00-2b-01-01-02 (VP)
       39000000000000000000000000.08002b010102.00      pending	08-00-2b-01-02-02  (FL)  39000000000000000000000000.08002b010203.00    R      0/65
       08-00-2b-01-02-03 (FD) 39000000000000000000000000.08002b010203.00       0/65

SEE ALSO

       Commands: atmconfig(8), atmelan(8), atmsig(8)

																	  learp(8)