NSE7 Troubleshooting and Diagnostics Practice Question
An SD-WAN rule has two members: port1 (SLA target latency < 10ms) and port2 (SLA target latency < 20ms). The administrator runs 'diagnose sys sdwan sla-check' and sees that both members meet SLA. However, all traffic is going through port2. What is the MOST likely reason?
⚠ Common exam trap
A common mix-up: candidates assume SLA compliance alone determines traffic distribution, overlooking that the SD-WAN rule must first match the traffic via service filters before any strategy or load-balancing logic applies.
Answer choices
Why each option matters
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 is configured with 'set service' that does not match the traffic
If the SD-WAN rule has a 'set service' filter that does not match the traffic being tested (e.g., it only applies to HTTP traffic while the test traffic is ICMP or UDP), the rule will not be used for that traffic, causing the traffic to fall through to a default route or another rule that uses port2. Even though both members meet SLA, the traffic is not matched by the rule, so the SD-WAN load-balancing or strategy logic never applies.
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 SD-WAN strategy is set to 'load balancing' and the load balancing algorithm is 'spillover'
Why it's wrong here
Spillover uses traffic volume; if port1's volume is low, it may not be used.
- ✗
The SD-WAN strategy is set to 'manual'
Why it's wrong here
Manual strategy requires explicit rule configuration to use a specific member; if not configured, traffic may not use port1.
- ✓
The SD-WAN rule is configured with 'set service' that does not match the traffic
Why this is correct
If the rule's service (application) does not match the traffic, the rule is not applied, and traffic uses the default route or another rule.
- ✗
The 'update-static-route' is disabled on the SD-WAN
Why it's wrong here
This setting affects whether SD-WAN updates static routes, not path selection.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.