- A
Enable IPv6 unicast routing globally
This step is correct because OSPFv3 requires IPv6 to be enabled globally with the 'ipv6 unicast-routing' command before OSPFv3 can function.
- B
Configure OSPFv3 on the interface
This is incorrect because OSPFv3 is configured on interfaces using the 'ipv6 ospf <process-id> area <area-id>' command, but this step must occur after enabling IPv6 routing and creating the OSPFv3 process.
- C
Create the OSPFv3 routing process
This is incorrect because while creating the OSPFv3 process with 'ipv6 router ospf <process-id>' is necessary, it must be done after enabling IPv6 unicast routing globally.
- D
Verify OSPFv3 adjacency
This is incorrect because verification is the final step, performed after all configuration steps are complete.
Quick Answer
The correct order is A, C, B, D: first globally enable IPv6 unicast routing, then create the OSPFv3 routing process, next configure OSPFv3 on the interface, and finally verify the OSPFv3 adjacency. This sequence is necessary because OSPFv3 for IPv6 requires the IPv6 protocol stack to be active on the router before any routing process can be defined, and the process must exist before interfaces can be explicitly assigned to it—otherwise, Cisco IOS-XE may auto-create a process with default parameters, bypassing your explicit control. On the CCNA 200-301 v2 exam, this drag-and-drop task tests your understanding of the mandatory prerequisite steps versus optional verification, and a common trap is placing interface configuration before process creation, which would trigger an automatic process ID. Remember the mnemonic “U-P-I-V” (Unicast, Process, Interface, Verify) to lock in the OSPFv3 configuration steps order for IPv6.
CCNA IP Routing Practice Question
This 200-301 practice question tests your understanding of ip routing. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 following steps into the correct order to explicitly configure OSPFv3 for IPv6 on a Cisco IOS-XE router, assuming no OSPFv3 routing process exists beforehand.
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
Enable IPv6 unicast routing globally
To configure OSPFv3, first globally enable IPv6 unicast routing (A). Next, create the OSPFv3 routing process (C) so that it is defined before interfaces try to use it. Then, configure OSPFv3 on the relevant interfaces (B) to activate routing. Finally, verify the OSPFv3 adjacency (D) to confirm neighbors are formed. This sequence avoids automatic process creation and ensures all steps are explicitly controlled.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enable IPv6 unicast routing globally
Why this is correct
This step is correct because OSPFv3 requires IPv6 to be enabled globally with the 'ipv6 unicast-routing' command before OSPFv3 can function.
Related concept
OSPF neighbours must agree on key parameters.
- ✓
Configure OSPFv3 on the interface
- ✓
Create the OSPFv3 routing process
- ✓
Verify OSPFv3 adjacency
Why this is correct
This is incorrect because verification is the final step, performed after all configuration steps are complete.
Related concept
OSPF neighbours must agree on key parameters.
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 200-301 OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this 200-301 question test?
IP Routing — This question tests IP Routing — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: Enable IPv6 unicast routing globally — To configure OSPFv3, first globally enable IPv6 unicast routing (A). Next, create the OSPFv3 routing process (C) so that it is defined before interfaces try to use it. Then, configure OSPFv3 on the relevant interfaces (B) to activate routing. Finally, verify the OSPFv3 adjacency (D) to confirm neighbors are formed. This sequence avoids automatic process creation and ensures all steps are explicitly controlled.
What should I do if I get this 200-301 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 200-301 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Last reviewed: Jun 6, 2026
This 200-301 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 200-301 exam.
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