Deep packet inspection (DPI) is a packet filtering process that examines the contents of packets. DPI identifies different types of packets by application such as VOIP, email, web so that different actions can be taken on the packets. These actions include traffic management and blocking.

DPI is available for Policy-Based Routing (PBR) and Quality of Service (QoS). DPI is configured to classify and route traffic by using the new application name or application type CLI. The application name and application type configurations are mutually exclusive. You can use only one configuration at a time within a single rule. However, you can configure different application names and application types in separate rules. A single application can be matched from a list of DPI engine applications at the most granular level.