Quick Answer
The correct actions are to use `set next-hop-self` on the BGP neighbor in each VRF or to configure route leaking via `config router vrf` with the `leak-route` command. BGP, by default, treats each VRF as a separate routing table and will not advertise routes between them without explicit route leaking; the `next-hop-self` option forces the FortiGate to become the next hop, which combined with BGP multipath in specific topologies, effectively leaks routes across VRFs. On the Fortinet NSE 7 Advanced Security NSE7 exam, this scenario tests your understanding of VRF segmentation and BGP route redistribution, often appearing as a trick where candidates mistakenly try to import routes or adjust local preference. A common trap is assuming BGP automatically shares routes between VRFs, but remember that VRFs are isolated by design. Memory tip: think “VRF isolation means no automatic BGP sharing—leak it with `next-hop-self` or `leak-route`.”
NSE7 Advanced Networking and SD-WAN Practice Question
This NSE7 practice question tests your understanding of advanced networking and sd-wan. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A FortiGate is configured with multiple VRFs. An administrator notices that routes from VRF A are not being advertised to VRF B via BGP, even though the BGP configuration is correct. Which TWO actions could resolve this issue?
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 a route leak from VRF A to VRF B under config router vrf
BGP by default does not advertise routes between VRFs. You must enable route leaking, either by using 'config router vrf' and 'leak-route' (option B) or by configuring 'next-hop-self' and using BGP multipath (option D) in certain topologies. Option A is not directly related. Option C is unnecessary. Option E is incorrect because you don't need to import routes.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related NSE7 OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this NSE7 question test?
Advanced Networking and SD-WAN — This question tests Advanced Networking and SD-WAN — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: Configure a route leak from VRF A to VRF B under config router vrf — BGP by default does not advertise routes between VRFs. You must enable route leaking, either by using 'config router vrf' and 'leak-route' (option B) or by configuring 'next-hop-self' and using BGP multipath (option D) in certain topologies. Option A is not directly related. Option C is unnecessary. Option E is incorrect because you don't need to import routes.
What should I do if I get this NSE7 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related NSE7 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Same concept, more angles
1 more ways this is tested on NSE7
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A FortiGate is configured with multiple virtual routers (VRFs). The administrator wants to allow communication between two VRFs using a firewall policy. Which type of interface is required for the policy?
easy- ✓ A.VDOM link
- B.VLAN subinterface
- C.Loopback interface
- D.Virtual-wire pair
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Last reviewed: Jun 21, 2026
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.
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