The correct answer is that both interfaces are correctly assigned to VRFs and are operational. This is confirmed by the show ip vrf interfaces command, which directly displays the VRF-to-interface mappings along with each interface’s IP address and protocol status. In this output, Gi0/0 is mapped to VRF CUSTOMER_C and Gi0/1 to VRF CUSTOMER_D, with both showing an “up” protocol status, meaning the Layer 3 connectivity is active and the VRF assignments are properly applied. On the Cisco CCNP ENARSI 300-410 exam, this command tests your ability to verify MPLS L3VPN configuration at a glance, often appearing in troubleshooting scenarios where a misassigned VRF or a down interface is the hidden issue. A common trap is assuming that an interface with an IP address is automatically in the global routing table—remember, the VRF column must explicitly show a name for it to be in a VRF. Memory tip: “VRF up, VRF mapped” — if the interface shows a VRF name and is up, the VRF assignment is working.
300-410 MPLS L3VPN Practice Question
This 300-410 practice question tests your understanding of mpls l3vpn. 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.
A network engineer runs the following command on Router PE3:
PE3# show ip vrf interfaces
Interface IP-Address VRF Protocol
Gi0/0 10.1.1.1 CUSTOMER_C up
Gi0/1 10.2.2.1 CUSTOMER_D up
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Both interfaces are correctly assigned to VRFs and are operational.
The show ip vrf interfaces command displays VRF-to-interface mappings. Both interfaces are up and assigned to VRFs CUSTOMER_C and CUSTOMER_D respectively. This indicates proper VRF configuration.
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.
✓
Both interfaces are correctly assigned to VRFs and are operational.
Why this is correct
The output shows both interfaces are up and assigned to VRFs.
Related concept
Read the scenario before looking for a memorised answer.
✗
Interface Gi0/0 is down.
Why it's wrong here
The 'Protocol' column shows 'up' for both interfaces.
✗
VRF CUSTOMER_C has no routes.
Why it's wrong here
The output only shows interface assignment; it does not show routing information.
✗
The router has no VRF configuration.
Why it's wrong here
Two VRFs are shown, so VRF configuration exists.
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
The 'Protocol' column shows 'up' for both interfaces.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
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.
MPLS L3VPN — This question tests MPLS L3VPN — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Both interfaces are correctly assigned to VRFs and are operational. — The show ip vrf interfaces command displays VRF-to-interface mappings. Both interfaces are up and assigned to VRFs CUSTOMER_C and CUSTOMER_D respectively. This indicates proper VRF configuration.
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.
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Question Discussion
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