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300-410 Practice Question: Runs the following command to troubleshoot a…
A network engineer runs the following command to troubleshoot a DMVPN spoke not registering with the hub:
R2# debug nhrp
NHRP: Send Registration Request via Tunnel0 10.0.0.2, target 10.0.0.1 NHRP: Receive Registration Reply via Tunnel0 10.0.0.1, src 10.0.0.1, dst 10.0.0.2 NHRP: Registration successful for 10.0.0.2/32 via Tunnel0
What does this output indicate?
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 has successfully registered its tunnel IP 10.0.0.2/32 with the hub at 10.0.0.1.
The debug output shows a successful NHRP registration: the spoke sends a registration request to the hub and receives a reply, confirming that the spoke's tunnel IP is registered with the hub.
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 is unable to reach the hub; the registration request is being sent but no reply is received.
Why it's wrong here
Incorrect because the output shows a reply received and registration successful.
- ✓
The spoke has successfully registered its tunnel IP 10.0.0.2/32 with the hub at 10.0.0.1.
Why this is correct
Correct: The debug shows the registration request and reply, ending with 'Registration successful'.
- ✗
The spoke is sending a registration request to 10.0.0.1 but the hub is not responding, causing a timeout.
Why it's wrong here
Incorrect because a reply is received.
- ✗
The spoke is attempting to register with the wrong hub IP address.
Why it's wrong here
Incorrect because the target IP matches the hub and a reply is received.
Go deeper
Related to this question
Learn chapter
Introduction to ENARSI Exam and Network Fundamentals
Key term
DMVPN Phase 2
DMVPN Phase 2 is an advanced Cisco routing technology that allows spoke routers to communicate directly with one another without sending traffic through a central hub, using dynamic routing protocols and multipoint GRE tunnels.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.