- A
The spoke router does not receive an NHRP Registration Reply from the hub.
This indicates that the registration request failed, possibly due to authentication mismatch or reachability issues.
- B
The hub router's NHRP cache does not contain an entry for the spoke.
If the spoke is not registered, the hub will not have an NHRP entry for it.
- C
The spoke router's tunnel interface shows 'UP/UP' but NHRP registration status is 'NOT REGISTERED'.
This directly indicates that the tunnel is up but NHRP registration has failed.
- D
The spoke router's tunnel interface shows 'UP/DOWN'.
Why wrong: This indicates a Layer 1/2 issue or misconfiguration, not specifically an NHRP registration problem.
- E
The spoke router's routing table shows routes learned from the hub.
Why wrong: This is a normal symptom of a working DMVPN, not a problem.
Quick Answer
The answer is that a spoke router’s tunnel interface showing UP/UP while its NHRP registration status reads NOT REGISTERED is a primary symptom of NHRP registration failure in a DMVPN network. This occurs because the spoke successfully establishes the multipoint GRE tunnel at Layer 2, but the NHRP registration request sent to the hub never receives a reply, leaving the spoke unregistered in the hub’s NHRP cache. On the Cisco CCNP ENARSI 300-410 exam, this question tests your ability to distinguish between tunnel interface states and NHRP control-plane health, often trapping candidates who assume UP/UP means full connectivity. Additional symptoms include the spoke not appearing in the hub’s NHRP cache and the spoke failing to receive a registration reply, while issues like routing protocol flaps or incorrect IPsec settings are not direct NHRP symptoms. Remember the tip: “Tunnel UP/UP does not mean NHRP is up—check the registration status first.”
300-410 DMVPN Practice Question
This 300-410 practice question tests your understanding of dmvpn. 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.
Which THREE symptoms indicate a potential issue with NHRP registration in a DMVPN network? (Choose THREE.)
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 spoke router does not receive an NHRP Registration Reply from the hub.
Common symptoms of NHRP registration problems include the spoke not receiving a registration reply from the hub, the spoke not appearing in the hub's NHRP cache, and the spoke's tunnel interface showing a status of 'UP/UP' but the NHRP registration being 'NOT REGISTERED'. The other options are not direct symptoms of NHRP registration issues.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 spoke router does not receive an NHRP Registration Reply from the hub.
Why this is correct
This indicates that the registration request failed, possibly due to authentication mismatch or reachability issues.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
The hub router's NHRP cache does not contain an entry for the spoke.
Why this is correct
If the spoke is not registered, the hub will not have an NHRP entry for it.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
The spoke router's tunnel interface shows 'UP/UP' but NHRP registration status is 'NOT REGISTERED'.
Why this is correct
This directly indicates that the tunnel is up but NHRP registration has failed.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The spoke router's tunnel interface shows 'UP/DOWN'.
Why it's wrong here
This indicates a Layer 1/2 issue or misconfiguration, not specifically an NHRP registration problem.
- ✗
The spoke router's routing table shows routes learned from the hub.
Why it's wrong here
This is a normal symptom of a working DMVPN, not a problem.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 300-410 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Questions learners often ask
What does this 300-410 question test?
DMVPN — This question tests DMVPN — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The spoke router does not receive an NHRP Registration Reply from the hub. — Common symptoms of NHRP registration problems include the spoke not receiving a registration reply from the hub, the spoke not appearing in the hub's NHRP cache, and the spoke's tunnel interface showing a status of 'UP/UP' but the NHRP registration being 'NOT REGISTERED'. The other options are not direct symptoms of NHRP registration issues.
What should I do if I get this 300-410 question wrong?
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 18, 2026
This 300-410 practice question is part of Courseiva's free Cisco 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 300-410 exam.
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