Quick Answer
The answer is to set the SD-WAN rule’s load balancing method to ‘spillover’, define the spillover threshold on the primary interface, and add the secondary interface as a member of the SD-WAN zone. This configuration is correct because the spillover algorithm directs all new sessions to the primary link until its bandwidth utilization reaches the specified threshold—in this case, 80%—at which point excess traffic spills over to the secondary link. On the Fortinet NSE 7 Advanced Security NSE7 exam, this question tests your understanding of SD-WAN spillover algorithm configuration steps, often appearing as a multi-select item where you must distinguish between mandatory actions and common distractors like setting interface weights or configuring performance SLAs. A frequent trap is assuming the threshold is set within a performance SLA, but it is actually defined directly on the interface’s SD-WAN member settings. Memory tip: think “spillover = threshold on the interface, not the SLA” to avoid the trick.
This NSE7 practice question tests your understanding of advanced networking and sd-wan. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A FortiGate is configured with an SD-WAN zone containing two WAN interfaces. The administrator wants to use the 'spillover' load balancing algorithm to ensure that the primary link carries traffic until its bandwidth reaches 80% utilization, after which new sessions are sent to the secondary link. Which THREE configuration steps are necessary?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Create a performance SLA to measure bandwidth utilization
Why wrong: Spillover uses interface bandwidth, not SLA.
Assign a weight of 80 to the primary interface and 20 to the secondary
Why wrong: Weights are not used in spillover algorithm.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Add both interfaces as members of the SD-WAN rule
Spillover requires setting the algorithm to 'spillover' in the SD-WAN rule (option A). Then, you need to define the spillover threshold on the primary interface (option C), and also set the secondary interface as a member (option E) so traffic can fail over. Option B is not needed if you use spillover; you don't need to set weight. Option D is incorrect because the threshold is set on the interface, not in a performance SLA.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Create a performance SLA to measure bandwidth utilization
Why it's wrong here
Spillover uses interface bandwidth, not SLA.
Assign a weight of 80 to the primary interface and 20 to the secondary
Why it's wrong here
Weights are not used in spillover algorithm.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the NSE7 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which NSE7 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Advanced Networking and SD-WAN — This question tests Advanced Networking and SD-WAN — Read the scenario before looking for a memorised answer..
The correct answer is: Add both interfaces as members of the SD-WAN rule — Spillover requires setting the algorithm to 'spillover' in the SD-WAN rule (option A). Then, you need to define the spillover threshold on the primary interface (option C), and also set the secondary interface as a member (option E) so traffic can fail over. Option B is not needed if you use spillover; you don't need to set weight. Option D is incorrect because the threshold is set on the interface, not in a performance SLA.
Identify which NSE7 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 21, 2026
This NSE7 practice question is part of Courseiva's free Fortinet certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the NSE7 exam.
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