# Filtering classifier blocks

Use this procedure to filter a classifier block.

## 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.

4. Click Filter.

   The QOSRules Classifier Block - Filter dialog opens .

5. Select the filtering condition, case, and column criteria.

6. Enter the BlockNum and Name.

7. Click Filter.