10-30-2014
I apology for being unclear,
2. Laptop-Fred was in my mind a shell variable, call it var_laptop_1 if this is better and this vari2ble would have to store the ip address 192.168.0.10 of the laptop we are trying to identify
3. From the result of nmap in this dhcp configuration the mac address X1:X2:3X:X4:X5:Y6 corresponds to 192.168.0.10
Thank you very much for your help,
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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)