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300-410 Practice Question: The default value of the Router Advertisement…
What is the default value of the Router Advertisement (RA) interval in IPv6 First Hop Security (FHS) when using the 'ipv6 nd ra-interval' command on an IOS-XE interface?
⚠ Common exam trap
Cisco often tests the distinction between the default RA interval for standard IPv6 ND (600 seconds) and the default for FHS (200 seconds), trapping candidates who assume the standard value applies to FHS configurations.
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
✓
200 seconds
The default Router Advertisement (RA) interval in IPv6 First Hop Security (FHS) when using the 'ipv6 nd ra-interval' command on an IOS-XE interface is 200 seconds. This value is defined by RFC 4861, which specifies that the default RA interval should be between 30 and 1800 seconds, with Cisco implementing a default of 200 seconds for FHS to balance responsiveness and network overhead.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
100 seconds
Why it's wrong here
This is not the default; 100 seconds is a common manual setting but not the IOS default.
- ✓
200 seconds
Why this is correct
Correct. The default RA interval on Cisco IOS-XE is 200 seconds.
- ✗
600 seconds
Why it's wrong here
600 seconds is the default maximum RA interval per RFC 4861, but Cisco uses 200 seconds as the default for the 'ipv6 nd ra-interval' command.
- ✗
300 seconds
Why it's wrong here
300 seconds is not the default; it is a common alternative but not the IOS default.
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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.