Installation guide

Chapter 10
130 Sniffer Technologies
Define Filter Options for Wireless Networks
The Sniffer software adds several wireless-specific filtering options, including:
 IEEE 802.11 Packet Type Filters
 Error Packet Filters
You set wireless-specific filters in the Define Filter dialog box’s Advanced tab.
You display this tab by selecting the Define Filter command from either the
Monitor, Capture, or Display menu. Filters defined from the Monitor menu
are monitor filters — they apply to data analyzed by the monitor. Similarly,
filters defined from the Capture menu are capture filters — they apply to
captured data. Filters defined from the Display menu are display filters — they
temporarily remove captured data from the display so you can concentrate on
the protocols in which you are most interested.
Figure 10-12 shows the Advanced tab of the Define Filter dialog box with the
802.11 packet types and error packet types available for filtering.
Figure 10-12. Setting Advanced Filters on WLAN Packet Types
Wireless LAN error packet types available
for filtering appear here.
Wireless LAN packet
type filters appear
under the IEEE 802.11
entry. You can click
open the
Management, Control,
and Data entries to
display individual
packet types on which
you can filter.