Sniffer Adaptive Application Analyzer: Adaptive Mode ... - NetScout

EARLY FIELD TRIAL Chapter 4
94 Sniffer Adaptive Application Analyzer
In general, Statistics Filters are most useful when you know what
sort of data you would like to focus on in the Statistics panel. You
can quickly focus the Statistics panel displays on all traffic related
to a particular IP subnet, a particular combination of ports, a VLAN
ID, and so on, temporarily eliminating the data that does not
interest you. Because you can apply any Quick Select filter as a
Statistics filter, you have a high degree of control in determining
exactly what data is displayed.
In contrast to Statistics Filters, which limit data upload quite
precisely and are usually most useful in network analysis situations
with specific needs, the Top N feature is a more generalized way
to improve performance, limiting the number of unique
conversation items displayed to the specified number.
You will most likely apply and remove different Statistics Filters
depending on your short-term analysis needs. In contrast, you will
probably want to find a value for Top N that optimizes the
Console’s performance in your particular network and let it remain
set.
Statistic Filtering and the Global Statistics Tab
When using Statistics filters on a stream to reduce data in the Graph
panel, the Global Statistics tab will not reflect the filtered data set. This
behavior is intentionally designed to prevent the Sniffer Adaptive
Application Analyzer PC from becoming bogged down by filtering
massive data flows associated with Gigabit Ethernet traffic. Use the
Selected Statistics tab to view filtered data in the Graph panel.
Selecting a Statistics Filter
The Statistics Filter dropdown includes all filters set up using the
adjacent Create/Edit Filter controls. As described in Capturing and
Mining Data on page 109,filters can be quite complex combinations of
different addresses, ports, protocols, and so on. You can set up filters to
focus the Statistics panel on exactly the data you want to see.
NOTE: Filters that include a Pattern Match component cannot be
used as Statistics filters. An error message will appear if you
attempt to select such a filter.
To apply a Statistics Filter:
1 Use the Create/Edit Filter controls to define at least one filter. See
Using the Mining Summary Dialog on page 116 for details on how
to do this.