Question 1,217 of 2,152

NetFlow and Flexible NetFlow →mediumMultiple ChoiceObjective-mapped

Troubleshooting No Flow Export: Interpreting Show Flow Exporter with Zero Flows

This 300-410 practice question tests your understanding of netflow and flexible netflow. 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 R1:

R1# show flow exporter EXPORTER-1

Flow Exporter EXPORTER-1: Description: Exports to collector Export protocol: NetFlow Version 9 Transport Configuration: Destination IP address: 192.168.1.100 Source IP address: 10.0.0.1 Transport Protocol: UDP Destination Port: 2055 Source Port: 0 Collector Configuration: VRFs: Default Options Configuration: Sampler: Not configured Export Statistics: Number of Flows exported: 0 Number of Packets exported: 0 Number of Source IP address unreachable: 0 Number of Packets dropped: 0

Based on this output, what is the most likely reason that no flows are being exported?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

A
The destination port is incorrect; NetFlow version 9 requires port 9996.
Why wrong: NetFlow version 9 commonly uses UDP port 2055, not 9996.
B
The flow exporter is not referenced in any flow monitor applied to an interface.
The exporter statistics show no flows exported, but no errors, meaning the exporter is idle. This typically occurs when no flow monitor using this exporter is applied to an interface.
C
The source IP address is not reachable from the destination.
Why wrong: If the source IP were unreachable, the 'Number of Source IP address unreachable' counter would increment, but it is 0.
D
The sampler is not configured, causing all packets to be dropped.
Why wrong: A sampler is optional; without it, all packets are sampled by default. This does not cause drops.

Full breakdown with real-world context →

Quick Answer

The answer is that the flow exporter is not referenced in any flow monitor applied to an interface. This is the most likely reason for the "no flow export" issue because the output of `show flow exporter` shows zero flows and zero packets exported with no errors—no unreachable destinations, no drops—indicating the exporter configuration itself is valid, but it is simply never being called into action. In NetFlow architecture, the exporter defines the transport details, but it must be linked to a flow monitor (which defines what to capture), and that monitor must be applied to an interface for traffic to be sampled and exported. On the Cisco CCNP ENARSI 300-410 exam, this scenario tests your understanding of the NetFlow data plane pipeline: a correctly configured exporter with zero flows is a classic trap that leads candidates to check connectivity or UDP ports, when the real issue is a missing interface-level application. A quick memory tip: "Exporter without a monitor is like a car with no driver—it’s ready to go but never moves."

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

✓

The flow exporter is not referenced in any flow monitor applied to an interface.

The output shows 0 flows exported, but no errors. This often indicates that the flow monitor is not applied to an interface or the exporter is not referenced in a flow monitor. The exporter itself is configured correctly with a valid destination.

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.

✗
The destination port is incorrect; NetFlow version 9 requires port 9996.
Why it's wrong here
NetFlow version 9 commonly uses UDP port 2055, not 9996.
✓
The flow exporter is not referenced in any flow monitor applied to an interface.
Why this is correct
The exporter statistics show no flows exported, but no errors, meaning the exporter is idle. This typically occurs when no flow monitor using this exporter is applied to an interface.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The source IP address is not reachable from the destination.
Why it's wrong here
If the source IP were unreachable, the 'Number of Source IP address unreachable' counter would increment, but it is 0.
✗
The sampler is not configured, causing all packets to be dropped.
Why it's wrong here
A sampler is optional; without it, all packets are sampled by default. This does not cause drops.

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.

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?

NetFlow and Flexible NetFlow — This question tests NetFlow and Flexible NetFlow — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The flow exporter is not referenced in any flow monitor applied to an interface. — The output shows 0 flows exported, but no errors. This often indicates that the flow monitor is not applied to an interface or the exporter is not referenced in a flow monitor. The exporter itself is configured correctly with a valid destination.

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

Are there clue words in this question I should notice?

Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

About these practice questions

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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 on Router R1: R1# show flow exporter EXPORTER-1 statistics Flow Exporter: EXPORTER-1 Packet send statistics (last 30 seconds): Packets sent: 0 Packets dropped: 0 Packets unsent: 0 Client send statistics: Packets sent: 0 Packets dropped: 0 Packets unsent: 0 Export statistics: Number of Flows exported: 0 Number of Packets exported: 0 Number of Source IP address unreachable: 0 Number of Packets dropped (no route): 0 Number of Packets dropped (queue full): 0 Based on this output, what is the most likely cause of no exports?

medium

A.The destination IP address is unreachable.
✓ B.The flow exporter is not referenced in any flow monitor, or the flow monitor is not attached to an interface.
C.The UDP port is blocked by a firewall.
D.The source IP address is not configured on any interface.

Why B: The exporter statistics show no flows exported and no errors. This typically means the exporter is not receiving any flows from a flow monitor, likely because the flow monitor is not attached to an interface or the flow monitor does not reference this exporter.

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