Sensor performance with Layer 7 Data Collection

Turning on the Layer 7 Data Collection feature reduces Sensor performance.

• HTTP Response Scanning setting
• Proportion of HTTP traffic to other protocols
• Relative number of HTTP requests and responses in each direction
• Size of a response page sent to the client by the sites or applications that are typically accessed

The following table provides the performance details in a test environment.

• The test environment used 5 HTTP 1.1 get page requests per TCP connection with a 10 K response, each sent in one direction.
• When Advanced Traffic Inspection is enabled, in a deployment with 90 percent of traffic without evasions and 10 percent of traffic with evasions, the overall Sensor throughput would further drop by an additional five percent approximately. For example, if you get 1 Gbps throughput with Layer 7 Data Collection enabled, you would see 950 Mbps if Advanced Traffic Inspection is also enabled.

NS-series Sensor performance with Layer 7 Data Collection

Virtual IPS Sensor performance with Layer 7 Data Collection