mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show ipv6 nd raguard policy Interface Policy Role State
Gi0/0/0 RA_GUARD router ACTIVE Gi0/0/1 RA_GUARD host ACTIVE Gi0/0/2 (default) host ACTIVE
Based on this output, which statement is correct?
⚠ Common exam trap
Cisco often tests the misconception that all interfaces with an active RA Guard policy are blocked, but the key differentiator is the 'role' (router vs. host), not just the policy being active.
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
✓
Interface Gi0/0/0 is allowed to send Router Advertisements.
The 'show ipv6 nd raguard policy' output shows that interface Gi0/0/0 is configured with the RA_GUARD policy in the 'router' role and is ACTIVE. In IPv6 RA Guard, a port in the 'router' role is explicitly permitted to send Router Advertisements (RAs), while ports in the 'host' role are blocked from sending RAs. Therefore, only Gi0/0/0 is allowed to send RAs, making option A correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Interface Gi0/0/0 is allowed to send Router Advertisements.
Why this is correct
Role 'router' under RA guard permits sending RAs.
- ✗
Interface Gi0/0/1 is allowed to send Router Advertisements.
Why it's wrong here
Role 'host' blocks RAs.
- ✗
Interface Gi0/0/2 is allowed to send Router Advertisements.
Why it's wrong here
Default policy with role 'host' blocks RAs.
- ✗
All interfaces are blocked from sending Router Advertisements.
Why it's wrong here
Gi0/0/0 is permitted to send RAs.
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