Question 768 of 2,152

VRF-Lite →hardMultiple SelectObjective-mapped

VRF-Lite Troubleshooting Commands

This 300-410 practice question tests your understanding of vrf-lite. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 THREE commands are used to troubleshoot VRF-Lite connectivity issues on a Cisco IOS-XE router? (Choose THREE.)

A
show ip route vrf <vrf-name>
Shows the routing table for the specified VRF, critical for verifying route presence.
B
ping vrf <vrf-name> <destination>
Sends ICMP echo requests from within the VRF context, testing end-to-end connectivity.
C
show vrf
Displays all VRFs and their associated interfaces, confirming correct configuration.
D
traceroute <destination>
Why wrong: Without the VRF keyword, traceroute uses the global routing table and may not work for VRF destinations.
E
show ip cef
Why wrong: Shows the global CEF table, not VRF-specific; use 'show ip cef vrf <vrf-name>' instead.

Full breakdown with real-world context →

Quick Answer

The answer is show vrf, show ip route vrf, and ping vrf. These three commands are correct because VRF-Lite isolates routing tables on a single router, so standard troubleshooting tools must be scoped to the specific VRF instance to verify connectivity and path selection. The show vrf command confirms the VRF exists and lists its associated interfaces, show ip route vrf displays the routing table for that VRF, and ping vrf tests end-to-end reachability from within the VRF context. On the Cisco CCNP ENARSI 300-410 exam, this question tests your understanding that VRF-aware commands are mandatory—common traps include selecting traceroute without the vrf keyword, which defaults to the global table, or show ip cef without vrf, which shows global forwarding only. A useful memory tip is the “V-T-P” mnemonic: V for show vrf (verify the VRF exists), T for show ip route vrf (check the table), and P for ping vrf (probe connectivity).

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

✓

show ip route vrf <vrf-name>

These three commands provide essential troubleshooting information: 'show ip route vrf' displays the VRF routing table, 'ping vrf' tests connectivity from within a VRF, and 'show vrf' shows VRF status and interfaces. The other options: 'traceroute' without VRF context may not work correctly, and 'show ip cef' without VRF shows global CEF, not VRF-specific.

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.

✓
show ip route vrf <vrf-name>
Why this is correct
Shows the routing table for the specified VRF, critical for verifying route presence.
Related concept
Read the scenario before looking for a memorised answer.
✓
ping vrf <vrf-name> <destination>
Why this is correct
Sends ICMP echo requests from within the VRF context, testing end-to-end connectivity.
Related concept
Read the scenario before looking for a memorised answer.
✓
show vrf
Why this is correct
Displays all VRFs and their associated interfaces, confirming correct configuration.
Related concept
Read the scenario before looking for a memorised answer.
✗
traceroute <destination>
Why it's wrong here
Without the VRF keyword, traceroute uses the global routing table and may not work for VRF destinations.
✗
show ip cef
Why it's wrong here
Shows the global CEF table, not VRF-specific; use 'show ip cef vrf <vrf-name>' instead.

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

Keyword trap
Without the VRF keyword, traceroute uses the global routing table and may not work for VRF destinations.
Command / output trap
Shows the global CEF table, not VRF-specific; use 'show ip cef vrf <vrf-name>' instead.

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?

VRF-Lite — This question tests VRF-Lite — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: show ip route vrf <vrf-name> — These three commands provide essential troubleshooting information: 'show ip route vrf' displays the VRF routing table, 'ping vrf' tests connectivity from within a VRF, and 'show vrf' shows VRF status and interfaces. The other options: 'traceroute' without VRF context may not work correctly, and 'show ip cef' without VRF shows global CEF, not VRF-specific.

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

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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