The BIG-IP Administrator is investigating if better TCP performance is possible for a virtual server. Which built-in profile should be tried first?

The f5-tcp-progressive profile is designed as a high-performance profile that aggressively optimizes TCP connections for modern, reliable networks. It incorporates features like a larger initial congestion window, Appropriate Byte Counting (ABC), and other enhancements over the default TCP profile. For a general investigation into improving TCP performance, this profile is the recommended first choice as it provides significant throughput gains on networks with low-to-moderate latency and packet loss, which is a common starting environment.

A. The f5-tcp-legacy profile is designed for compatibility with older TCP stacks and generally offers lower performance than modern profiles.

B. The f5-tcp-mobile profile is specifically optimized for high-latency, high-packet-loss networks typical of mobile and cellular connections.

D. The f5-tcp-wan profile is optimized for Wide Area Networks, focusing on handling higher latency and lower bandwidth than a typical LAN environment.

1. F5 Networks. (2021). BIG-IP TMOS: Implementations, version 16.1. Chapter 11: "TCP and HTTP Profiles". The guide describes f5-tcp-progressive as a profile that "aggressively optimizes the TCP connection for the LAN" and is a good starting point for performance tuning.

2. F5 Networks. (2021). K8024: The BIG-IP LTM f5-tcp-progressive TCP profile. This knowledge base article explicitly states, "The f5-tcp-progressive profile is a pre-configured, aggressive profile that you can use for general purpose performance improvements." It details the specific settings that enhance performance.