NSE7 Troubleshooting and Diagnostics Practice Question
An administrator configures BGP route advertisement but the routes are not being sent to the neighbor. The BGP session is established. What is the MOST likely cause?
⚠ Common exam trap
A common mix-up: candidates assume a BGP session being established guarantees route advertisement, but BGP requires explicit 'network' statements or redistribution to inject prefixes, and the session state only indicates TCP connectivity and BGP open message exchange.
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 'network' statement is missing for the desired prefix
The BGP session is established, so Layer 3 connectivity and TCP port 179 are working. The most common reason for routes not being advertised to a neighbor is that the 'network' statement is missing for the desired prefix. In BGP, the 'network' command does not advertise the prefix unless it matches an exact route in the IP routing table; without it, BGP has no prefix to send, even if the session is up.
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 BGP administrative distance is set too high
Why it's wrong here
Administrative distance affects route preference, not advertisement.
- ✗
The BGP neighbor has the wrong update-source interface
Why it's wrong here
This affects session establishment, not route advertisement.
- ✗
The route is filtered by a route-map
Why it's wrong here
Route-maps can filter, but the most common initial missing configuration is the network statement.
- ✓
The 'network' statement is missing for the desired prefix
Why this is correct
Without a network statement, FortiGate does not advertise the route even if it is in the routing table.
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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.