The answer is that CoPP can police IPv6 traffic using the same policy-map as IPv4. This is correct because Control Plane Policing operates at the control plane level, applying a single policy-map to classify and rate-limit traffic before it reaches the CPU, regardless of the IP version. While the policy-map framework is shared, the key technical nuance is that IPv6-specific protocols such as OSPFv3 or RIPng require their own ACLs or class-maps within that policy to be properly matched, as they use different protocol numbers and headers than their IPv4 counterparts. On the Cisco CCNP ENARSI 300-410 exam, this concept tests your understanding that CoPP is protocol-agnostic at the policy level but protocol-specific at the classification level—a common trap is assuming you need a separate policy-map for IPv6. A solid memory tip: “Same policy, different match”—the policy-map is unified, but the match statements must be tailored to the IPv6 protocol.
300-410 Control Plane Policing (CoPP) Practice Question
This 300-410 practice question tests your understanding of control plane policing (copp). Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Which statement about CoPP and IPv6 control plane traffic is correct?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
CoPP can police IPv6 traffic using the same policy-map as IPv4
CoPP can classify and police IPv6 control plane traffic using the same policy-map framework, but IPv6-specific protocols like OSPFv3 or RIPng must be matched using appropriate ACLs or class-maps.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
CoPP does not support IPv6 traffic
Why it's wrong here
CoPP fully supports IPv6 control plane traffic.
✗
IPv6 traffic is automatically classified as critical
Why it's wrong here
Classification depends on the ACL or class-map configuration, not on the IP version.
✓
CoPP can police IPv6 traffic using the same policy-map as IPv4
Why this is correct
CoPP uses a single policy-map that can match both IPv4 and IPv6 traffic via ACLs or class-maps.
IPv6 traffic is subject to CoPP just like IPv4 traffic.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
OSPF neighbours must agree on key parameters.
Router ID selection can affect neighbour relationships and LSDB output.
OSPF cost influences the preferred path.
A route can appear in OSPF information but not become the installed route.
TExam Day Tips
→Check area mismatch first when OSPF adjacency fails.
→Review passive interfaces when a network is advertised but no neighbour forms.
→Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
Control Plane Policing (CoPP) — This question tests Control Plane Policing (CoPP) — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: CoPP can police IPv6 traffic using the same policy-map as IPv4 — CoPP can classify and police IPv6 control plane traffic using the same policy-map framework, but IPv6-specific protocols like OSPFv3 or RIPng must be matched using appropriate ACLs or class-maps.
What should I do if I get this 300-410 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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