- A
Create an RA Guard policy using the 'ipv6 nd raguard policy POLICY_NAME' command.
The policy defines the role (router or host) and other parameters; it is a mandatory step.
- B
Apply the RA Guard policy to the interface with the 'ipv6 nd raguard attach-policy POLICY_NAME' command.
This command attaches the policy to the interface, enabling RA Guard enforcement.
- C
Enable IPv6 routing globally with 'ipv6 unicast-routing'.
Why wrong: IPv6 routing is not required for RA Guard on a switch; RA Guard works in Layer 2 mode.
- D
Configure 'ipv6 nd raguard' directly on the interface without a policy.
Why wrong: This is not valid; RA Guard requires a policy to define the role; the command alone is incomplete.
- E
Enable DHCPv6 Guard on the same interface to complement RA Guard.
Why wrong: DHCPv6 Guard is a separate feature and is not required for RA Guard to function.
Quick Answer
The answer is that you must first create an RA Guard policy defining the device role (router or host) and then apply that policy to the interface using the 'ipv6 nd raguard attach-policy POLICY_NAME' command. This two-step process is required because RA Guard does not function as a simple on/off toggle; the policy dictates which router advertisement messages are trusted or dropped based on the interface’s role, preventing rogue RA attacks. On the Cisco CCNP ENARSI 300-410 exam, this topic tests your understanding of IPv6 First Hop Security features, and a common trap is assuming that enabling 'ipv6 nd raguard' alone is sufficient—it is not, as the policy attachment is mandatory. To remember, think of RA Guard as a bouncer: you must write the guest list (the policy) before telling the bouncer which door to guard (the interface).
300-410 IPv6 First Hop Security Practice Question
This 300-410 practice question tests your understanding of ipv6 first hop security. 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.
Which TWO configuration steps are required to enable IPv6 RA Guard on a Cisco switch interface? (Choose TWO.)
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 an RA Guard policy using the 'ipv6 nd raguard policy POLICY_NAME' command.
RA Guard requires defining a policy that specifies the device role (router or host) and then applying that policy to the interface. Simply enabling 'ipv6 nd raguard' without a policy is not sufficient. The other options are either for different features or incorrect.
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.
- ✓
Create an RA Guard policy using the 'ipv6 nd raguard policy POLICY_NAME' command.
Why this is correct
The policy defines the role (router or host) and other parameters; it is a mandatory step.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Apply the RA Guard policy to the interface with the 'ipv6 nd raguard attach-policy POLICY_NAME' command.
Why this is correct
This command attaches the policy to the interface, enabling RA Guard enforcement.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Enable IPv6 routing globally with 'ipv6 unicast-routing'.
Why it's wrong here
IPv6 routing is not required for RA Guard on a switch; RA Guard works in Layer 2 mode.
- ✗
Configure 'ipv6 nd raguard' directly on the interface without a policy.
Why it's wrong here
This is not valid; RA Guard requires a policy to define the role; the command alone is incomplete.
- ✗
Enable DHCPv6 Guard on the same interface to complement RA Guard.
Why it's wrong here
DHCPv6 Guard is a separate feature and is not required for RA Guard to function.
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 is not valid; RA Guard requires a policy to define the role; the command alone is incomplete.
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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IPv6 First Hop Security — study guide chapter
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IPv6 First Hop Security practice questions
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FAQ
Questions learners often ask
What does this 300-410 question test?
IPv6 First Hop Security — This question tests IPv6 First Hop Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create an RA Guard policy using the 'ipv6 nd raguard policy POLICY_NAME' command. — RA Guard requires defining a policy that specifies the device role (router or host) and then applying that policy to the interface. Simply enabling 'ipv6 nd raguard' without a policy is not sufficient. The other options are either for different features or incorrect.
What should I do if I get this 300-410 question wrong?
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on 300-410
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A network engineer runs the following command to troubleshoot an IPv6 First Hop Security issue: R1# debug ipv6 nd raguard *Mar 1 00:01:23.456: IPv6-ND-RA-Guard: R1, Fa0/0, RA received on port Fa0/0, src fe80::1, dst ff02::1 *Mar 1 00:01:23.456: IPv6-ND-RA-Guard: R1, Fa0/0, RA from fe80::1 is allowed by policy TRUSTED *Mar 1 00:01:24.789: IPv6-ND-RA-Guard: R1, Fa0/0, RA received on port Fa0/0, src fe80::2, dst ff02::1 *Mar 1 00:01:24.789: IPv6-ND-RA-Guard: R1, Fa0/0, RA from fe80::2 is blocked by policy UNTRUSTED What does this output indicate?
medium- ✓ A.RA Guard is configured with a policy that trusts fe80::1 and blocks fe80::2, preventing rogue RA attacks.
- B.RA Guard is blocking all RAs regardless of source, indicating a misconfiguration.
- C.RA Guard is allowing all RAs but logging them for analysis.
- D.RA Guard is not configured; the debug output is from default IPv6 ND behavior.
Why A: The debug output shows RA Guard filtering RAs based on device trust. RAs from trusted sources are allowed, while those from untrusted sources are blocked to prevent rogue RA attacks.
Last reviewed: Jun 18, 2026
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