NSE7 Advanced Networking and SD-WAN Practice Question
A network admin is configuring SD-WAN on a FortiGate with two WAN members (port1, port2). The requirement is that traffic for Office 365 (source IP 10.1.1.0/24, destination IP 132.245.0.0/16) should use port1 primarily unless it fails the performance SLA, in which case it should use port2. Which SD-WAN rule configuration should the admin use?
⚠ Common exam trap
A common mix-up: candidates confuse 'manual' strategy with a simple preferred member setting, but 'manual' lacks automatic SLA-based failover, which is essential for this requirement.
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
✓
Configure the rule with 'strategy = best quality', and enable 'set match-vip enable'. Use performance SLA to monitor port1
'best quality' strategy allows SD-WAN to use performance SLA to monitor port1 and automatically fail over to port2 when port1 fails the SLA. This matches the requirement of using port1 primarily unless it fails the performance SLA. The 'set match-vip enable' is not directly relevant here but does not invalidate the rule; the core mechanism is the performance SLA-driven failover.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure the rule with 'strategy = spillover' and set spillover thresholds
Why it's wrong here
Spillover is for load balancing based on traffic volume, not SLA-based failover.
- ✗
Configure the rule with 'strategy = source-dest-ip' and include port1 and port2
Why it's wrong here
Source-dest-ip is a load balancing algorithm that distributes traffic across members; it does not provide SLA-based failover.
- ✓
Configure the rule with 'strategy = best quality', and enable 'set match-vip enable'. Use performance SLA to monitor port1
Why this is correct
Best quality uses the performance SLA to select the best member. When the primary member fails SLA, traffic moves to the next best.
- ✗
Configure the rule with 'strategy = manual' and set the preferred member to port1
Why it's wrong here
Manual strategy always uses the preferred member regardless of SLA; it does not failover.
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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.