Installation guide

Wireless Guide 97
Configuring Wireless LANs to Capture
Determining a Wireless Unit’s Full Hexadecimal Address
If you do not know the full hexadecimal address of a wireless unit (either an
access point or a mobile unit) in your network, you should first check the unit.
Often, the address is written on the equipment itself.
If this does not work, you can use the Expert’s displays to discover the
address. However, because most of the Expert’s displays substitute textual
manufacturer IDs for the first three bytes of a hexadecimal MAC address (that
is, a hexadecimal address of
0020d8014060 would usually be identified in
Expert displays as
Netwav014060), you need to know where to look in Expert
displays to find the entire address in hexadecimal.
To determine a wireless unit’s full hexadecimal address:
1 Start capturing from the network containing the unit whose address you
want to determine. Alternatively, you can open a trace file captured
from that network.
2 In the Expert display, examine the Station Function column in the
Summary pane at the Wireless layer. In this column, locate an entry for
either an
Access Point or a Mobile Unit. Highlight this entry.
The Detail pane automatically updates to show statistics for the entry
selected in the Summary pane.
3 In the Detail pane, scroll down to the Wireless Address field. This field
shows the entire hexadecimal address of the selected unit. A textual
manufacturer’s ID is not substituted for the first portion of the address.
4 Repeat this procedure for each access point on the network whose full
hexadecimal address you want to determine.
Importing and Exporting Known Addresses
The Sniffer software also provides export and import capabilities for the known
address lists in the Tools > Expert Options > 802.11 Options tab.
You can export the contents of either the Known Access Points or the
Known Mobile Units list using the corresponding Export button in the 802.11
Options tab. Exported files are saved in comma-separated values (CSV)
format. The exported file consists of a heading row with the IP Address and
MAC Address column headings followed by multiple data rows in the format
IP Address,MAC Address. For example, a small exported CSV file might
appear:
IP Address,MAC Address
192.168.1.40,08002000E25B
192.168.1.14,0800000036D9
192.168.1.25,080020061107