# 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