The answer is that the CoPP policy is allowing all traffic and not dropping any packets, as confirmed by the show policy-map control-plane input class class-default output. This is correct because the counters show 12,234 packets conformed and transmitted, with zero packets exceeded or violated, meaning the policer’s committed information rate of 8000 bps has not been exceeded. In the context of the Cisco CCNP ENARSI 300-410 exam, this command is used to verify Control Plane Policing configuration and troubleshoot whether route-map-based classification is effectively protecting the control plane. A common trap is misreading the “drop rate 0 bps” line as inactivity, but the key is the conformed versus exceeded packet counts—if all packets are conforming, the policy is permissive, not restrictive. Remember the memory tip: “Conformed = Carried; Exceeded = Ejected” to quickly interpret CoPP verification output.
300-410 Route Maps and Route Filtering Practice Question
This 300-410 practice question tests your understanding of route maps and route filtering. 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 to verify CoPP (Control Plane Policing) with route-maps:
R1# show policy-map control-plane input class class-default
Control Plane
Service-policy input: CoPP
Class-map: class-default (match-any)
12234 packets, 1234567 bytes
5 minute offered rate 1000 bps, drop rate 0 bps
Match: any
police:
cir 8000 bps, bc 1500 bytes, be 1500 bytes
conformed 12234 packets, 1234567 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 allowing all traffic and not dropping any packets.
The output shows the CoPP policy applied to the control plane. The class-default matches all traffic and polices it at 8000 bps. All packets have conformed and been transmitted, with no drops. This indicates that the CoPP policy is working and not dropping any traffic.
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 dropping all traffic because the CIR is too low.
Why it's wrong here
The drop rate is 0 bps, so no traffic is being dropped.
✓
The CoPP policy is allowing all traffic and not dropping any packets.
Why this is correct
All packets have conformed to the police rate and have been transmitted, with no drops.
Related concept
Read the scenario before looking for a memorised answer.
✗
The CoPP policy is only matching specific traffic classes.
Why it's wrong here
The class-default matches any traffic, not specific classes.
✗
The CoPP policy is not applied to the control plane.
Why it's wrong here
The output shows the policy is applied and active.
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 output shows the policy is applied and active.
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.
Route Maps and Route Filtering — This question tests Route Maps and Route Filtering — 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 allowing all traffic and not dropping any packets. — The output shows the CoPP policy applied to the control plane. The class-default matches all traffic and polices it at 8000 bps. All packets have conformed and been transmitted, with no drops. This indicates that the CoPP policy is working and not dropping any traffic.
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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