mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to troubleshoot OSPFv3…
A network engineer runs the following command to troubleshoot OSPFv3 adjacency:
R1# debug ipv6 ospf adj *Mar 1 00:15:23.456: OSPFv3-1-IPv6 ADJ Gi0/0: Rcv pkt from 2001:DB8:1::2, src 2001:DB8:1::2, area 0 *Mar 1 00:15:23.457: OSPFv3-1-IPv6 ADJ Gi0/0: Nbr 2.2.2.2: Our address 2001:DB8:1::1, his address 2001:DB8:1::2 *Mar 1 00:15:23.458: OSPFv3-1-IPv6 ADJ Gi0/0: Nbr 2.2.2.2: Neighbor is not DR, state 2WAY *Mar 1 00:15:23.459: OSPFv3-1-IPv6 ADJ Gi0/0: Nbr 2.2.2.2: DR is 2001:DB8:1::2, BDR is 2001:DB8:1::1 *Mar 1 00:15:23.460: OSPFv3-1-IPv6 ADJ Gi0/0: Nbr 2.2.2.2: Build the Start DBD *Mar 1 00:15:23.462: OSPFv3-1-IPv6 ADJ Gi0/0: Nbr 2.2.2.2: Master/Slave negotiation done *Mar 1 00:15:23.464: OSPFv3-1-IPv6 ADJ Gi0/0: Nbr 2.2.2.2: Exchange done, loading started *Mar 1 00:15:23.466: OSPFv3-1-IPv6 ADJ Gi0/0: Nbr 2.2.2.2: Loading done *Mar 1 00:15:23.468: OSPFv3-1-IPv6 ADJ Gi0/0: Nbr 2.2.2.2: Full
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 OSPFv3 adjacency formed successfully between routers with router IDs 1.1.1.1 and 2.2.2.2.
The debug output shows the successful OSPFv3 adjacency formation between two routers on interface Gi0/0.
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 OSPFv3 adjacency failed due to area mismatch.
Why it's wrong here
The adjacency reached Full state, indicating success.
- ✓
The OSPFv3 adjacency formed successfully between routers with router IDs 1.1.1.1 and 2.2.2.2.
Why this is correct
The debug shows the neighbor with router ID 2.2.2.2 and the adjacency reaching Full.
- ✗
The adjacency is stuck in Exstart state due to interface MTU mismatch.
Why it's wrong here
Master/Slave negotiation and Exchange completed successfully.
- ✗
The router is the DR on this segment.
Why it's wrong here
The debug shows BDR is 2001:DB8:1::1 (this router), so it is BDR, not DR.
Visual reference
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
Go deeper
Related to this question
About these practice questions
This 300-410 question is part of Courseiva's 1,966-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.