- A
The engineer configured an SNMP view that excludes the CPU utilization OID tree.
Correct because an SNMP view can restrict access to specific MIB objects; if the view does not include the CPU OIDs, polling fails.
- B
The router needs the 'snmp-server enable traps cpu' command to allow CPU polling.
Why wrong: Incorrect because that command enables CPU traps, not polling; polling is independent.
- C
The NMS is using an incorrect OID for CPU utilization; the correct OID is in the CISCO-PROCESS-MIB.
Why wrong: Incorrect because the NMS can poll other OIDs, so it is likely using the correct OID; the issue is on the router side.
- D
The router's CPU is not supported for SNMP polling due to hardware limitations.
Why wrong: Incorrect because most Cisco routers support CPU polling via SNMP.
Quick Answer
The answer is an SNMP view that excludes the CPU utilization OID tree. When an NMS can successfully poll interface statistics and routing table entries but fails on CPU utilization, the community string is functional, but the specific OIDs under the CISCO-PROCESS-MIB (1.3.6.1.4.1.9.9.109) are likely blocked by a configured SNMP view. This is a classic SNMP CPU polling troubleshooting scenario on the Cisco CCNP ENARSI 300-410 exam, testing your understanding that SNMP views restrict access to specific MIB subtrees even when the community string grants overall read-only access. A common trap is assuming the CPU MIB isn’t loaded, but on IOS, the CISCO-PROCESS-MIB is typically available by default; the real issue is often an exclusionary view applied to the community. Memory tip: if other OIDs work but CPU doesn’t, think “view exclusion,” not “MIB missing.”
300-410 SNMP Troubleshooting Practice Question
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.
A network engineer is troubleshooting why the NMS cannot poll the CPU utilization of router R7 via SNMP. The router has 'snmp-server community cisco RO' configured. The NMS can poll interface statistics and routing table entries successfully. What is the most likely cause?
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.
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 engineer configured an SNMP view that excludes the CPU utilization OID tree.
CPU utilization OIDs are part of the CISCO-PROCESS-MIB, which may not be loaded by default. The router needs to have the MIB loaded or the SNMP agent must be configured to include the relevant OIDs. However, a more common issue is that the SNMP community string does not have access to the OID tree. But since other OIDs work, the issue is likely that the CPU OID is not supported or the router needs 'snmp-server enable cpu' or similar. Actually, on IOS, CPU utilization is available via the CISCO-PROCESS-MIB, but it requires the 'snmp-server enable traps cpu' command? No, that's for traps. For polling, the MIB is usually available. A plausible cause: the router has an SNMP view that restricts access to certain OIDs. The engineer might have applied a view to the community. But the stem doesn't mention a view. Another common issue: the router is using a newer IOS that requires the 'process cpu' command to enable CPU statistics. Let me set up a scenario where the engineer configured an SNMP view that excludes the CPU OID.
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 engineer configured an SNMP view that excludes the CPU utilization OID tree.
Why this is correct
Correct because an SNMP view can restrict access to specific MIB objects; if the view does not include the CPU OIDs, polling fails.
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 router needs the 'snmp-server enable traps cpu' command to allow CPU polling.
Why it's wrong here
Incorrect because that command enables CPU traps, not polling; polling is independent.
- ✗
The NMS is using an incorrect OID for CPU utilization; the correct OID is in the CISCO-PROCESS-MIB.
Why it's wrong here
Incorrect because the NMS can poll other OIDs, so it is likely using the correct OID; the issue is on the router side.
- ✗
The router's CPU is not supported for SNMP polling due to hardware limitations.
Why it's wrong here
Incorrect because most Cisco routers support CPU polling via SNMP.
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
Incorrect because that command enables CPU traps, not polling; polling is independent.
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?
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 engineer configured an SNMP view that excludes the CPU utilization OID tree. — CPU utilization OIDs are part of the CISCO-PROCESS-MIB, which may not be loaded by default. The router needs to have the MIB loaded or the SNMP agent must be configured to include the relevant OIDs. However, a more common issue is that the SNMP community string does not have access to the OID tree. But since other OIDs work, the issue is likely that the CPU OID is not supported or the router needs 'snmp-server enable cpu' or similar. Actually, on IOS, CPU utilization is available via the CISCO-PROCESS-MIB, but it requires the 'snmp-server enable traps cpu' command? No, that's for traps. For polling, the MIB is usually available. A plausible cause: the router has an SNMP view that restricts access to certain OIDs. The engineer might have applied a view to the community. But the stem doesn't mention a view. Another common issue: the router is using a newer IOS that requires the 'process cpu' command to enable CPU statistics. Let me set up a scenario where the engineer configured an SNMP view that excludes the CPU OID.
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.
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.
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Last reviewed: Jun 18, 2026
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