mediumMultiple Choice
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show policy-map control-plane
Control Plane
Service-policy input: CoPP-IN
Class-map: CoPP-EIGRP (match-all) 200 packets, 12000 bytes 5 minute offered rate 1000 bps, drop rate 0000 bps Match: access-group 150 police: cir 16000 bps, bc 3000 bytes, be 3000 bytes conformed 200 packets, 12000 bytes; actions: transmit exceeded 0 packets, 0 bytes; actions: drop violated 0 packets, 0 bytes; actions: drop
R1# show ip eigrp neighbors
EIGRP-IPv4 neighbors for process 100 H Address Interface Hold Uptime SRTT RTO Q Seq (sec) (ms) Cnt Num 0 10.1.1.2 Gi0/0 13 00:10:00 1 200 0 5
Based on this output, which statement is correct?
⚠ Common exam trap
Cisco often tests the misconception that a police rate being applied automatically means packets are being dropped, but the key is to check the actual packet counters (conformed/exceeded/violated) to determine if drops have occurred.
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
✓
EIGRP traffic is being rate-limited but no packets are dropped.
The output shows that the CoPP policy 'CoPP-IN' matches EIGRP packets (via access-group 150) and applies a police rate of 16,000 bps. The 'conformed' counter shows 200 packets transmitted, while 'exceeded' and 'violated' counters are zero, indicating no packets have been dropped. The 'show ip eigrp neighbors' output confirms the neighbor is established with an uptime of 10 minutes, so EIGRP traffic is being rate-limited but not dropped, making option B correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
EIGRP packets are being dropped, causing neighbor flapping.
Why it's wrong here
Both exceeded and violated counters read zero, and 200 of 200 packets conformed and were transmitted, so policing dropped nothing. Flapping would require non-zero drop counters plus repeated adjacency resets; the ten-minute uptime and stable hold timer show the opposite.
- ✓
EIGRP traffic is being rate-limited but no packets are dropped.
Why this is correct
The police counters show 200 conformed packets transmitted and zero exceeded or violated, so no drops occurred. EIGRP remains established with an active neighbour, confirming traffic is rate-limited to the 16000 bps CIR yet fully delivered, satisfying the statement that rate-limiting causes no packet loss.
- ✗
The police rate is set to 8000 bps.
Why it's wrong here
The output states cir 16000 bps, not 8000. The 1000 bps figure is the five-minute offered rate of matched EIGRP traffic, which is easily confused with the configured rate. A committed information rate of 8000 bps would appear on the police line itself.
- ✗
The EIGRP neighbor is not established.
Why it's wrong here
The neighbour table shows a valid entry with hold time 13 seconds and zero queue count, indicating the adjacency is up. It is tempting to read the CoPP drops as a fault, but no drops occurred and EIGRP is exchanging hellos normally.
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.