NSE7 Advanced Networking and SD-WAN Practice Question
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?
⚠ Common exam trap
Many candidates confuse performance SLA (which measures link quality) with bandwidth utilization monitoring (which is a separate interface-level feature), leading candidates to incorrectly select Option A.
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
✓
Add both interfaces as members of the SD-WAN rule
Both WAN interfaces must be added as members of the SD-WAN rule to define which interfaces participate in the spillover load balancing. Without adding them as members, the SD-WAN rule cannot distribute traffic between the primary and secondary links based on the spillover algorithm.
Answer analysis
Option-by-option breakdown
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.
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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.