- A
The NetFlow MIB is not loaded because NetFlow data export is not configured; the 'ip flow-export' command is missing.
The NetFlow MIB is only loaded when NetFlow is configured with 'ip flow-export' commands. Without it, the MIB is not available for SNMP polling.
- B
The SNMP community string does not have read access to the NetFlow MIB.
Why wrong: The community is RO, which should allow read access. The MIB is not loaded, so access is irrelevant.
- C
The router's SNMP agent is not compatible with the NetFlow MIB.
Why wrong: IOS supports NetFlow MIB, but it needs to be loaded.
- D
The NMS is using an incorrect OID for NetFlow statistics.
Why wrong: The MIB is not loaded, so any OID would return no such object.
Question 1,684 of 2,152
NetFlow MIB Not Loaded: Missing ip flow-export
This 300-410 practice question tests your understanding of snmp troubleshooting. 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.
Router R9 is configured with SNMP and NetFlow. The NMS uses SNMP to poll NetFlow statistics. The configuration includes: snmp-server community public RO, snmp-server enable traps netflow. However, the NMS cannot poll NetFlow MIB objects. The router's show snmp mib shows that the NetFlow MIB is not loaded. What is the root cause?
Quick Answer
The answer is that the NetFlow MIB is not loaded because the ip flow-export command is missing from the router configuration. This occurs because the NetFlow MIB is not loaded by default on Cisco IOS devices; it only becomes available when NetFlow data export is explicitly enabled. Without the ip flow-export command, the router has no active NetFlow flow cache or export mechanism, so the SNMP agent cannot register the associated MIB objects for polling. On the Cisco CCNP ENARSI 300-410 exam, this scenario tests your understanding of the dependency between NetFlow configuration and SNMP MIB loading—a common trap is assuming that enabling SNMP traps for NetFlow alone will load the MIB. Remember that the MIB is tied to the export process, not just the collection. A helpful memory tip: “No export, no MIB—export first, then poll.”
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 NetFlow MIB is not loaded because NetFlow data export is not configured; the 'ip flow-export' command is missing.
The NetFlow MIB is only loaded into the router's SNMP agent when NetFlow data export is actively configured. Without the 'ip flow-export' command, the router does not instantiate the NetFlow MIB objects, so 'show snmp mib' reports the MIB as not loaded. The NMS cannot poll statistics that do not exist in the SNMP agent's MIB tree.
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 NetFlow MIB is not loaded because NetFlow data export is not configured; the 'ip flow-export' command is missing.
Why this is correct
The NetFlow MIB is only loaded when NetFlow is configured with 'ip flow-export' commands. Without it, the MIB is not available for SNMP polling.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The SNMP community string does not have read access to the NetFlow MIB.
Why it's wrong here
The community is RO, which should allow read access. The MIB is not loaded, so access is irrelevant.
- ✗
The router's SNMP agent is not compatible with the NetFlow MIB.
Why it's wrong here
IOS supports NetFlow MIB, but it needs to be loaded.
- ✗
The NMS is using an incorrect OID for NetFlow statistics.
Why it's wrong here
The MIB is not loaded, so any OID would return no such object.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that SNMP traps and MIB polling are independent of the underlying feature configuration; the trap here is assuming that enabling SNMP traps for NetFlow automatically loads the NetFlow MIB, when in fact the MIB requires the 'ip flow-export' command to be present.
Detailed technical explanation
How to think about this question
The NetFlow MIB (CISCO-NETFLOW-MIB) is a dynamic MIB that is conditionally loaded by the SNMP agent only when NetFlow export is enabled via 'ip flow-export' under the interface or globally. This behavior is defined in Cisco's implementation to conserve memory; the MIB's tables (e.g., cflowStatsEntry) are populated only when flow data is being exported. In real-world scenarios, an engineer might configure SNMP traps for NetFlow without realizing the MIB itself requires the export feature to be active.
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.
TExam Day Tips
- 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.
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FAQ
Questions learners often ask
What does this 300-410 question test?
SNMP Troubleshooting — This question tests SNMP Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The NetFlow MIB is not loaded because NetFlow data export is not configured; the 'ip flow-export' command is missing. — The NetFlow MIB is only loaded into the router's SNMP agent when NetFlow data export is actively configured. Without the 'ip flow-export' command, the router does not instantiate the NetFlow MIB objects, so 'show snmp mib' reports the MIB as not loaded. The NMS cannot poll statistics that do not exist in the SNMP agent's MIB tree.
What should I do if I get this 300-410 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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