The answer is that the SD-WAN rule's strategy is not set to 'Best Quality' or 'SLA'. Even when the primary link shows an SLA status of 'pass', the SD-WAN rule may still direct traffic to the backup link if its strategy is configured to 'Maximize Bandwidth' or uses a load-balancing algorithm that favors the backup link due to tie-breaking metrics like lower jitter or cost. This is a common trap on the Fortinet NSE 7 Advanced Security NSE7 exam, where candidates assume an SLA pass guarantees primary link usage, but the rule’s strategy overrides SLA results unless explicitly set to 'Best Quality' or 'SLA'. The 'diagnose sys sdwan sla-check' output confirms SLA compliance, so the issue lies in the rule logic, not the link health. Remember: SLA status is a gate, not a guarantee—strategy is the steering wheel. A quick memory tip: "SLA passes, but strategy classes"—always check the rule’s strategy field first when troubleshooting SD-WAN traffic not using the primary link despite SLA pass.
NSE7 Troubleshooting and Diagnostics Practice Question
This NSE7 practice question tests your understanding of troubleshooting and diagnostics. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
An SD-WAN rule uses a performance SLA to steer traffic to the best-quality link. Traffic is consistently using the backup link even though the primary link meets SLA thresholds. The admin runs 'diagnose sys sdwan sla-check' and sees the primary link SLA status is 'pass'. What is the MOST likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The SD-WAN rule's strategy is not set to 'Best Quality' or 'SLA'
Even if SLA passes, the SD-WAN rule may prefer a different link based on strategy or load balancing. Option B is correct because the SD-WAN rule's strategy might be set to 'Maximize Bandwidth' or 'Best Quality' but with tie-breaking that favors the backup link.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The primary link's interface is administratively down
Why it's wrong here
If down, SLA would show 'fail'.
✗
The primary link's cost is set higher than the backup
Why it's wrong here
Cost is used in some strategies but not in SLA-based steering; SLA status overrides cost.
✓
The SD-WAN rule's strategy is not set to 'Best Quality' or 'SLA'
Why this is correct
The rule must use SLA-based strategy; otherwise, it may ignore SLA results.
Clue confirmation
The clue words "best", "most likely", "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The backup link has a higher bandwidth
Why it's wrong here
Bandwidth alone does not override SLA if strategy is SLA-based.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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.
Trap categories for this question
Command / output trap
If down, SLA would show 'fail'.
Detailed technical explanation
How to think about this question
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.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
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.
Troubleshooting and Diagnostics — This question tests Troubleshooting and Diagnostics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The SD-WAN rule's strategy is not set to 'Best Quality' or 'SLA' — Even if SLA passes, the SD-WAN rule may prefer a different link based on strategy or load balancing. Option B is correct because the SD-WAN rule's strategy might be set to 'Maximize Bandwidth' or 'Best Quality' but with tie-breaking that favors the backup link.
What should I do if I get this NSE7 question wrong?
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.
Are there clue words in this question I should notice?
Yes — watch for: "best", "most likely", "primary". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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