mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to troubleshoot DMVPN…
A network engineer runs the following command to troubleshoot DMVPN NHRP:
R1# debug nhrp
NHRP: Registration request sent to 10.0.0.1 via GigabitEthernet0/0 NHRP: Registration reply received from 10.0.0.1 Holding time: 3600 sec Flags: 0x0000 NHRP: Cache added 10.1.1.1/32 via 10.0.0.1, non-caching
What does this output indicate?
⚠ Common exam trap
Cisco often tests the interpretation of NHRP flags, where candidates mistakenly assume that any reply indicates success, but the flags field (e.g., 0x0000 vs. 0x8000) is the actual indicator of acceptance or rejection.
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
✓
NHRP registration to the hub is successful.
The debug output shows that the spoke sent a registration request to the hub at 10.0.0.1 and received a registration reply with a holding time of 3600 seconds and flags set to 0x0000. The flags value of 0x0000 indicates that the hub accepted the registration without any errors or special conditions, and the subsequent cache addition confirms successful NHRP registration. Therefore, option A is correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
NHRP registration to the hub is successful.
Why this is correct
Registration request sent and reply received, with a cache entry added.
- ✗
NHRP registration failed because no reply was received.
Why it's wrong here
A reply was received.
- ✗
NHRP registration is pending due to authentication failure.
Why it's wrong here
No authentication failure is indicated.
- ✗
NHRP registration is rejected by the hub.
Why it's wrong here
The reply contains a holding time, indicating acceptance.
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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JA
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.