Question 1mediumdrag order
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Quick Answer
The correct order to verify DMVPN operational state begins with checking the tunnel interface status, followed by verifying NHRP mappings and IPsec security associations, then confirming routing protocol adjacencies over the tunnel, and finally testing end-to-end connectivity with ping or traceroute. This sequence is essential because DMVPN relies on a layered architecture: the tunnel interface must be up and operational before NHRP can register and resolve peer mappings, and IPsec must secure those tunnels before dynamic routing protocols can establish adjacencies over them. Only after these underlying components are confirmed can end-to-end reachability be meaningfully tested, as a successful ping validates that all layers—tunnel, encryption, and routing—are functioning together. On the Cisco CCNP ENARSI 300-410 exam, this drag-and-drop question tests your understanding of the logical dependency chain in DMVPN troubleshooting, with a common trap being to test connectivity first, which will fail if earlier steps are broken. A useful memory tip is “T-N-I-R-E”: Tunnel, NHRP, IPsec, Routing, End-to-end—think of it as “Tunnel NHRP IPsec Routing End-to-end” to keep the verification steps in the correct order.
300-410 DMVPN Practice Question
This 300-410 practice question tests your understanding of dmvpn. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Drag and drop the steps to verify and validate DMVPN operational state into the correct order, from first to last.
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"first"Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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
✓
Check tunnel interface status with show interface
Validating DMVPN starts with checking the tunnel interface status, then verifying NHRP mappings and IPsec security associations. Next, confirm routing protocol adjacencies over the tunnel. Finally, test end-to-end reachability to ensure the DMVPN network is fully operational.
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 300-410 OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this 300-410 question test?
DMVPN — This question tests DMVPN — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: Check tunnel interface status with show interface — Validating DMVPN starts with checking the tunnel interface status, then verifying NHRP mappings and IPsec security associations. Next, confirm routing protocol adjacencies over the tunnel. Finally, test end-to-end reachability to ensure the DMVPN network is fully operational.
What should I do if I get this 300-410 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 300-410 OSPF questions on adjacency and route selection.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Last reviewed: Jun 18, 2026
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