Sniffer® Portable Professional User's Guide - NetScout

Chapter 10
220 Sniffer Portable Professional
In general, you work with Defined filters in the Define Filter dialog
box. This section describes how to do that.
Automatic filters. In some cases, filters are created automatically
by Sniffer Portable Professional when you choose to view selected
information. For example, you can single-out a particular station's
conversations using the Visual Filter on the Matrix map display. You
can also set automatic Expert Filters in many Expert window
displays, as well as automatic Display filters from an active Decode
tab.
Automatic filters are described in the following sections:
Automatic Display filters are described in Setting Display
Filters on page 167.
Expert filters are described in Setting Automatic Expert
Display Filters on page 151
Define Filter Options for Wireless Networks
Defining Filters
When using Sniffer Portable Professional with a wireless adapter, the
Define Filter dialog box adds several wireless-specific filtering options:
The Define Filter dialog box’s Advanced tab includes wireless LAN
packet types on which you can filter (for example, PLCP Errors).
See Filters for 802.11 Packet Types in the Advanced Tab on page
237.
The Define Filter dialog box also includes an 802.11 tab specifically
for wireless LAN filtering. See Setting Filter Options in the 802.11
Tab on page 238.
In general, you work with filters in the Define Filter dialog box. The type
of filter is determined by its use:
When selecting what traffic to monitor, the filter becomes a
monitor filter.
When selecting what traffic to admit into the capture buffer, the
filter becomes a capture filter.
When selecting what data in the capture buffer to display, the filter
becomes a display filter.