Question 1,452 of 2,152

IPv6 Tunneling Techniques →mediumDrag & DropObjective-mapped

GRE over IPv4 Tunnel Configuration Steps (Order)

This 300-410 practice question tests your understanding of ipv6 tunneling techniques. 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 steps to configure a GRE tunnel for IPv6 over IPv4 into the correct order, from first to last.

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

E
Configure tunnel mode as 'tunnel mode gre ipv6'
Why wrong: This option is incorrect. The proper command to encapsulate IPv6 over IPv4 is 'tunnel mode gre ip', not 'tunnel mode gre ipv6'.

Full breakdown with real-world context →

Quick Answer

The correct order for configuring a GRE over IPv4 tunnel is: create the tunnel interface, assign an IPv6 address, set the tunnel source, set the tunnel destination, and finally configure the tunnel mode as 'tunnel mode gre ip'. This sequence follows the Cisco IOS-XE workflow because the tunnel interface must first exist to accept addressing and parameters, the source and destination define the IPv4 transport endpoints, and the tunnel mode must be set last to avoid protocol mismatches during configuration. On the CCNP ENARSI 300-410 exam, this drag-and-drop task tests your understanding of GRE tunnel encapsulation for IPv6 over IPv4, a common scenario for connecting isolated IPv6 networks across an IPv4 backbone. A frequent trap is placing the tunnel mode step too early, which can cause the interface to reject subsequent commands, or forgetting that the tunnel source must be an existing interface or IP on the local router. A helpful memory tip is "Interface, IP, Source, Destination, Mode" — think of it as "IISDM" (like "I is the mode") to lock in the correct order.

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

✓

Create tunnel interface with 'interface tunnel0'

The correct order follows the standard GRE tunnel configuration workflow for IPv6 over IPv4: first create the tunnel interface with 'interface tunnel0', then assign an IPv6 address to the tunnel, set the tunnel source, set the tunnel destination. Note that option E is incorrect because the correct command for IPv6 over IPv4 is 'tunnel mode gre ip', not 'tunnel mode gre ipv6'. Therefore, the correct steps are A, B, C, D only.

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.

✗
Configure tunnel mode as 'tunnel mode gre ipv6'
Why it's wrong here
This option is incorrect. The proper command to encapsulate IPv6 over IPv4 is 'tunnel mode gre ip', not 'tunnel mode gre ipv6'.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.

Trap categories for this question

Command / output trap
This option is incorrect. The proper command to encapsulate IPv6 over IPv4 is 'tunnel mode gre ip', not 'tunnel mode gre ipv6'.

Detailed technical explanation

How to think about this question

This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.

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.
Use explanations to understand the rule behind the answer.

TExam Day Tips

Underline the problem statement mentally.
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.

What to study next

Got this wrong? Here's your next step.

Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

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FAQ

Questions learners often ask

What does this 300-410 question test?

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: Create tunnel interface with 'interface tunnel0' — The correct order follows the standard GRE tunnel configuration workflow for IPv6 over IPv4: first create the tunnel interface with 'interface tunnel0', then assign an IPv6 address to the tunnel, set the tunnel source, set the tunnel destination. Note that option E is incorrect because the correct command for IPv6 over IPv4 is 'tunnel mode gre ip', not 'tunnel mode gre ipv6'. Therefore, the correct steps are A, B, C, D only.

What should I do if I get this 300-410 question wrong?

Are there clue words in this question I should notice?

Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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