mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: The default action for a CoPP policy-map class…
What is the default action for a CoPP policy-map class that does not have an explicit 'police' command?
⚠ Common exam trap
Cisco often tests the misconception that CoPP classes without a police command will drop traffic by default, similar to how an ACL ends with an implicit deny; the trap here is that CoPP uses a permit-by-default model for classes without explicit policing.
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
✓
Transmit all packets in that class
In Control Plane Policing (CoPP), if a class within a policy-map does not contain an explicit 'police' command, the default action is to transmit all packets matching that class. This is because CoPP operates on a permit-by-default model; only classes with a configured policer will have traffic rate-limited or dropped. The absence of a police action means no restriction is applied, so packets are allowed through to the control plane.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Drop all packets in that class
Why it's wrong here
Without a police command, packets are not dropped; they are transmitted by default.
- ✓
Transmit all packets in that class
Why this is correct
The default action for a class without a police statement is to permit and transmit all matching traffic.
- ✗
Log all packets in that class
Why it's wrong here
Logging is a reactive monitoring action that records packet headers for analysis, not a default forwarding or policing behaviour; a CoPP class without a `police` command defaults to a `drop` action, not logging. This option tempts because logging is often configured alongside policing to track dropped traffic, but it is never the implicit action when no explicit policy is applied. Logging would be correct only if the class had a `police` command with a `log` keyword to record exceeded packets.
- ✗
Apply the default aggregate policer
Why it's wrong here
There is no default aggregate policer; CoPP is disabled by default.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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