The answer is show interfaces tunnel 0, show running-config interface tunnel 0, and show ipv6 interface tunnel 0. These three commands are correct because they each verify a distinct layer of IPv6 tunnel operation: show interfaces tunnel 0 confirms the physical and data-link state (line protocol up/up, MTU, and encapsulation type like GRE), show running-config interface tunnel 0 displays the configured tunnel parameters such as source, destination, and tunnel mode, and show ipv6 interface tunnel 0 validates the IPv6-specific addressing, neighbor discovery, and multicast group membership on the tunnel. On the Cisco CCNP ENARSI 300-410 exam, this question tests your ability to isolate tunnel faults—a common trap is relying solely on ping or traceroute, which can succeed even with misconfigured tunnel parameters. A strong memory tip is to think in layers: “State, Config, IPv6”—first check the interface state, then the running configuration, then the IPv6 specifics.
300-410 IPv6 Tunneling Techniques Practice Question
This 300-410 practice question tests your understanding of ipv6 tunneling techniques. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 commands can be used to verify the operational state and configuration of an IPv6 tunnel? (Choose THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
show interfaces tunnel 0
Option A is correct because 'show interfaces tunnel 0' displays the operational state of the tunnel interface, including line protocol status, MTU, and encapsulation type (e.g., GRE/IPv6). This command verifies whether the tunnel is up/up and confirms the underlying transport is functioning.
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.
✓
show interfaces tunnel 0
Why this is correct
Correct. This command displays the tunnel interface status, MTU, and packet counters.
Related concept
Read the scenario before looking for a memorised answer.
✓
show ipv6 interface tunnel 0
Why this is correct
Correct. This command shows IPv6-specific information such as IPv6 address, link-local address, and neighbor discovery settings.
Related concept
Read the scenario before looking for a memorised answer.
✓
show running-config interface tunnel 0
Why this is correct
Correct. This command displays the current configuration of the tunnel interface, including mode, source, and destination.
Related concept
Read the scenario before looking for a memorised answer.
✗
show ip route
Why it's wrong here
Incorrect. This command shows IPv4 routes, not IPv6 tunnel information.
✗
show ipv6 route
Why it's wrong here
Incorrect. While show ipv6 route shows IPv6 routes, it does not provide tunnel interface operational details.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests that candidates confuse general routing table commands (show ip route, show ipv6 route) with interface-specific verification commands, leading them to select options that show reachability but not the tunnel's operational state or configuration.
Trap categories for this question
Command / output trap
Incorrect. This command shows IPv4 routes, not IPv6 tunnel information.
Detailed technical explanation
How to think about this question
IPv6 tunnels encapsulate IPv6 packets inside IPv4 (or IPv6) transport; the tunnel interface must be in an up/up state for traffic to flow. The 'show interfaces tunnel 0' command reveals the underlying IPv4 source/destination addresses and encapsulation overhead, while 'show ipv6 interface tunnel 0' confirms IPv6-specific parameters like link-local address and neighbor discovery. 'show running-config interface tunnel 0' is essential for verifying configured parameters such as tunnel mode (e.g., ipv6ip, gre ipv6) and source/destination addresses, which are critical for troubleshooting misconfigurations.
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.
TExam Day Tips
→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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
IPv6 Tunneling Techniques — This question tests IPv6 Tunneling Techniques — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: show interfaces tunnel 0 — Option A is correct because 'show interfaces tunnel 0' displays the operational state of the tunnel interface, including line protocol status, MTU, and encapsulation type (e.g., GRE/IPv6). This command verifies whether the tunnel is up/up and confirms the underlying transport is functioning.
What should I do if I get this 300-410 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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