All pool members are online and all other settings are default. What might alter the load balancing behavior?

By default, with all members online, a BIG-IP system uses its configured load balancing method (e.g., Round Robin) to distribute new connections across all available pool members. Adding a persistence profile fundamentally alters this behavior. Persistence instructs the BIG-IP system to send subsequent requests from the same client to the same pool member that serviced the client's initial request. This overrides the load balancing decision for the duration of the persistence entry, ensuring session continuity for the client at the expense of pure load distribution.

A. A OneConnect profile optimizes server-side TCP connections by reusing them but does not override the initial load balancing decision for a new client session.

B. SNAT Automap modifies the source IP address of traffic for routing purposes. It does not directly influence the server selection logic of the load balancing algorithm.

C. An HTTP fallback host is a feature used only when all pool members are marked 'down'. The scenario specifies all members are online.

- F5 Networks (2021). BIG-IP LTM: Concepts, F5-BIG-LTM-CON, Version 16.1. Chapter 6: Persistence, Section: Introducing connection persistence, p. 6-1. "Persistence is a feature of the BIG-IP system that allows the system to direct a client's requests to the same pool member... This is because persistence overrides the load balancing method."

- F5 Networks. (n.d.). K7392: Overview of the OneConnect profile. F5 Support. This article explains OneConnect's function as a connection pooling mechanism, distinct from load balancing or persistence logic.