Finisar Surveyor manual Filter Creation, Creating Filter Template Combinations

plate Combination

Tem-

Surveyor

User’s Guide

Filter Creation

The FILTER CREATION portion (left side) of the Filter Design window is the area that actually specifies what conditions are tested and what actions are taken for this filter statement. See Figure 7-1 for an example of the FILTER CREATION area.

•Create Template Combinations

A template combination is built up from various custom or pre-defined filter templates. Logical operators such as AND, OR, and NOT are used to create the logic sequence. Use the operator buttons below the Template Combination box to add operators and use the Add button to insert filter templates.

•Set Filter Actions and Custom Counters

Press the Set Filter Actions and Custom Counters button to set actions and incre- ment counters. The Filter Actions dialog box allows you to perform actions that go beyond simple packet capture or display, such as incrementing counters, set- ting a trigger position, or changing the operational state of the filter. The default setting is to capture the packet (if the filter template conditions are true) and continue.

•Add Counter Conditions

A counter condition is a special condition for accepting/rejecting a packet based on a counter value. Logically, a counter condition functions like a filter tem- plate. The settings for counters are test values that can be compared to actual packet counts and thereby determine subsequent actions.

•Filter Packet Types

Four types of frames can be collected and displayed. Refine your selection crite- ria by selecting only a subset of all frame types. If all boxes are checked, all frame types will pass the filter unless rejected by the other filter criteria you have specified in the Template Combination box.

Creating Filter Template Combinations

A template combination provides a way to create a more refined search for specific data. The template combinations are built by selecting a combination of filter tem- plates, operators, and custom counters. An example template combination is shown below:

MAC_Source_Aaddress AND (SMTP OR FTP)

The Template Combination box shows the syntax for the condition. Double-click on filters templates or single-click on operators (buttons) and they appear in the

field.

Filter templates are the primary building blocks of a template combination. A filter template contains the patterns for creating the logical conditions that will be used as

7-12