Last Modified: Nov 22, 2021
Known Affected Versions:
Opened: Sep 16, 2016 Severity: 3-Major
Custom BIG-IP hardware provides a significant assist to the main CPU complex for FastL4 traffic with full PVA acceleration enabled; however, the main CPU still performs significant per-connection packet processing. Bug fixes and stability improvements in v12.1.1-HF1 and -HF2 have increased this load slightly. With a traffic profile that results in a high number of new connections and very little data exchanged per connection, if the CPU reaches 100% utilization, the average connections per second will be decreased.
The average CPS will decrease over the same configuration running v12.1.1 by approximately 5 percent, as observed with internal F5 traffic stress testing.
BIG-IP v12.1.1_HF1 and _HF2, with a virtual server configured for FastL4 traffic, and including a profile that enables Full PVA Acceleration is affected. The traffic includes an extreme number of new connections, with minimal data exchanged during each connection. i5800 appliances have shown a 5-7% decrease.