The answer is that the CoPP policy is policing control plane traffic at 1 Mbps, but no packets have been matched yet. This output from the `show policy-map control-plane input class class-default` command reveals that the policer is configured with a committed information rate (CIR) of 1,000,000 bps, yet the packet and byte counters for both conformed and exceeded actions read zero, indicating that no traffic has actually been classified by the class-default map. For the Cisco CCNP ENARSI 300-410 exam, this scenario tests your ability to interpret CoPP policy analysis and recognize that a zero-packet count often means the policy is either misapplied, the control plane is idle, or the traffic is being matched by a different class before reaching class-default. A common trap is assuming the policy is working simply because it is configured; instead, remember that zero counters signal no enforcement is occurring. Memory tip: “Zero counters, zero action—CoPP is just a paper tiger without traffic matching.”
300-410 Network Logging and Syslog Practice Question
This 300-410 practice question tests your understanding of network logging and syslog. 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 runs the following command to troubleshoot a Network Logging and Syslog issue:
R1# show policy-map control-plane input class class-default
Output:
Class-map: class-default (match-any)
0 packets, 0 bytes
5 minute offered rate 0 bps, drop rate 0 bps
Match: any
police:
cir 1000000 bps, bc 31250 bytes
conformed 0 packets, 0 bytes; actions:
transmit
exceeded 0 packets, 0 bytes; actions:
drop
violated 0 packets, 0 bytes; actions:
drop
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The CoPP policy is policing control plane traffic at 1 Mbps, but no packets have been matched yet.
The output shows the CoPP policy for the control plane, with a policer that limits traffic to 1 Mbps. The counters show no traffic has been matched, which may indicate that the policy is not effective or no traffic is hitting the control plane.
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 CoPP policy is policing control plane traffic at 1 Mbps, but no packets have been matched yet.
Why this is correct
The policer is configured with CIR 1 Mbps, but counters show 0 packets.
Related concept
Read the scenario before looking for a memorised answer.
✗
The CoPP policy is dropping all control plane traffic.
Why it's wrong here
The policy is policing, but no packets have been dropped because none have been matched.
✗
The CoPP policy is not applied to the control plane.
Why it's wrong here
The command shows policy-map control-plane, so it is applied.
✗
The CoPP policy is using a class-map that matches all traffic.
Why it's wrong here
The class-default matches any traffic, but the output shows no packets matched.
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 command shows policy-map control-plane, so it is applied.
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.
Network Logging and Syslog — This question tests Network Logging and Syslog — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The CoPP policy is policing control plane traffic at 1 Mbps, but no packets have been matched yet. — The output shows the CoPP policy for the control plane, with a policer that limits traffic to 1 Mbps. The counters show no traffic has been matched, which may indicate that the policy is not effective or no traffic is hitting the control plane.
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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