NSE7 Troubleshooting and Diagnostics Practice Question
A FortiGate is receiving BGP routes from a neighbor but not advertising them to other peers. The administrator runs 'get router info bgp network' and sees the routes are in the BGP table but not advertised. What is the most likely cause?
⚠ Common exam trap
Many exam-takers assume BGP synchronization (Option A) is the cause, but synchronization only affects IBGP-learned routes and is disabled by default in modern implementations, whereas an outbound route map is the direct mechanism controlling advertisement to peers.
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
✓
An outbound route map is applied that filters these routes
An outbound route map can explicitly filter which routes are advertised to BGP peers. Even though routes are present in the BGP table (as shown by 'get router info bgp network'), an outbound route map applied to the neighbor configuration can deny or modify those routes before they are sent, preventing their advertisement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
BGP synchronization is enabled and the routes are not in the IGP
Why it's wrong here
Synchronization is disabled by default in modern configurations.
- ✓
An outbound route map is applied that filters these routes
Why this is correct
Correct. A route map can selectively permit or deny routes from being advertised.
- ✗
The next hop is unreachable
Why it's wrong here
If next hop unreachable, the route would not be installed in the BGP table.
- ✗
The router-id is the same as the peer
Why it's wrong here
Router-id duplicate could cause issues, but not specifically this symptom.
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JA
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.