# Viewing the classifier block

Use this procedure to open the Classifier Block tab.

## Procedure steps

1. From the navigation tree, double-click QoS.

2. From the QoS tree, double-click QoS Rules.

3. Select the Classifier Block tab.

## Variable definitions

The following table outlines the parameters of the Classifier Block tab.

Table 1. QoS Rules Classifier Block tab parameters
Variable | Value
--- | ---
BlockNum | Entries with the same BlockNum belong to the same classifier block. Note Click heading on this column to list entries in numerical order to view which entries have the same BlockNum.
Name | Displays the name you assigned to that classifier block.
ClassifierSetId | Displays the ID number assigned to that classifier (from the Classifier screen).
Meter | Displays the meter associated with the classifier block.
Action | Displays the action followed for those flows not being metered. (For those flows being metered, this attribute is not applied.)
SessionId | Displays the numerical identification for the current session.
Storage | Specifies the storage type for this conceptual row. Conceptual rows that has the value permanent need not allow write-access to any columnar objects in the row. This object may not be modified if the associated status object is equal to active.
Version | Specifies the version.
EvalOrder | Specifies the evaluation order number.

This section contains information about the following topics:

- Appending classifier blocks

- Adding classifier blocks

- Deleting classifier blocks

- Filtering classifier blocks