Which three strategies are valid SD-WAN rule strategies for member selection? (Choose three answers)

FortiOS 7.x offers three member-selection strategies in an SD-WAN rule: Manual, Lowest Cost (SLA) and Best Quality. Manual can be run in priority (first-available) or load-balance mode; therefore “Manual with load balancing” is a valid strategy. Lowest Cost (SLA) can be used with, or without, the Load Balancing option, making both “Lowest Cost (SLA) without load balancing” and “Lowest Cost (SLA) with load balancing” valid. Best Quality never allows the Load Balancing flag, and there is no “Lowest Quality” strategy; hence the other choices are invalid.

C. “Lowest Quality (SLA)” is not an available strategy; only “Best Quality” exists.
E. Best Quality automatically selects the single best-performing member; the GUI/CLI does not permit enabling Load Balancing with this strategy.

1. Fortinet, “FortiOS 7.2 Administration Guide”, Section “Creating SD-WAN rules – Strategy”, Table “Strategy options” (p. 876-877): lists Manual, Lowest Cost (SLA) and Best Quality; notes load-balancing only for Manual and Lowest Cost.

2. Fortinet, “FortiOS 7.2 CLI Reference”, command path: config system sdwan service → set strategy {manual | cost | quality}; set mode {priority | load-balance} applies to manual; load-balance flag allowed on cost strategy (pp. 2593-2595).

3. Fortinet KB Article FD50462, “Understanding SD-WAN rule strategies” (2023-02-14), para. 3-5: confirms Best Quality has no load-balance option, while Manual and Lowest Cost can enable it.