The answer is to use the commands get router info bgp neighbor and diagnose ip router bgp all enable. The first command is essential for verifying the BGP session state, as it displays the current status, such as Idle, Active, or Established, which directly indicates whether the session is negotiating correctly. The second command enables real-time debug logging for BGP negotiation, allowing you to see the exact exchange of OPEN messages and error codes, which is critical when the neighbor IP is reachable but the session still fails to establish. On the Fortinet NSE 7 Advanced Security NSE7 exam, this scenario tests your ability to move beyond basic connectivity checks and use both state inspection and debugging to isolate BGP-specific issues like mismatched AS numbers or hold timers. A common trap is relying solely on ping to confirm reachability, which does not reveal BGP layer failures. Remember the mnemonic “State then Debug” to recall that you first check the neighbor state with get router info, then enable diagnose to capture the negotiation details.
NSE7 Troubleshooting and Diagnostics Practice Question
This NSE7 practice question tests your understanding of troubleshooting and diagnostics. 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.
An administrator is troubleshooting a BGP session that is not establishing between two FortiGates. The administrator has verified that the neighbor IP is reachable. Which TWO commands should be used to further diagnose the issue? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
get router info bgp neighbor <IP>
Options A and B are correct. 'get router info bgp neighbor' shows session state, and 'diagnose ip router bgp all enable' provides debug output for negotiation.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
get router info bgp neighbor <IP>
Why this is correct
This command shows BGP session state and counters, useful for troubleshooting.
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.
Trap categories for this question
Command / output trap
This shows BGP routes, not session establishment issues.
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.
Troubleshooting and Diagnostics — This question tests Troubleshooting and Diagnostics — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: get router info bgp neighbor <IP> — Options A and B are correct. 'get router info bgp neighbor' shows session state, and 'diagnose ip router bgp all enable' provides debug output for negotiation.
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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