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How to calculate Supported Maximum PPS (Packets Per Second) of UTM appliance


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How to calculate Supported Maximum PPS (Packets Per Second) of UTM appliance

Last Updated: 5/11/2018 7987 Views 50 Users found this article helpful

Description

How to calculate Supported Maximum PPS (Packets Per Second) of UTM appliance

Resolution

In order to calculate the PPS capabilities of a device, the best way is using the throughput ratings on the spec sheets. This way, we can account for PPS with full DPI, and SPI only from actual test results
For example, the NSA 2400 supported UTM throughput is 150Mbps, i.e., the aggregate of bandwidth processing in both directions at the same time
150 Mbps = 150,000,000 bits =150,000,000/8 = 18,750,000 Bytes
Default MTU size is 1500, then divide 18,750,000 by 1500 bytes
18,750,000/1500= 12,500 Packets per second
So, the NSA 2400, with full DPI, can process 12,500 packets per second.

For example:
The NSA 2400 supported stateful Inspection throughput is 775 Mbps, i.e., the aggregate of bandwidth processing in both directions at the same time.
775 Mbps = 775,000,000 bits
775,000,000/8 = 96,875,000 bytes
Default MTU size is 1500, then divide 96,875,000 by 1500 bytes
96,875,000/1500= 64,584 Packets per second
So, the NSA 2400, with only stateful Inspection, can process 64,584 packets per second.

https://www.sonicwall.com/en-us/support/knowledge-base/170504889979238