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300-410 Practice Question: Examine the following EIGRP configuration on…
Examine the following EIGRP configuration on Router R3:
interface GigabitEthernet0/1 ip bandwidth-percent eigrp 100 50
What is the effect of this command?
⚠ Common exam trap
Many candidates confuse the `ip bandwidth-percent eigrp` command (which limits EIGRP control traffic) with the `bandwidth` command (which sets the metric value and is used for QoS calculations), leading candidates to incorrectly think it adjusts metrics or data traffic limits.
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 will limit its control traffic to 50% of the interface bandwidth.
The `ip bandwidth-percent eigrp` command controls the percentage of the interface bandwidth that EIGRP can use for its control traffic (hello packets, updates, queries, and replies). By setting it to 50%, EIGRP will limit its control traffic to 50% of the configured interface bandwidth, preventing it from overwhelming the link. This does not affect data traffic or metric calculation.
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 will use only 50% of the interface bandwidth for data traffic.
Why it's wrong here
This command limits EIGRP's own bandwidth usage, not data traffic.
- ✓
EIGRP will limit its control traffic to 50% of the interface bandwidth.
Why this is correct
The ip bandwidth-percent eigrp command restricts the percentage of bandwidth EIGRP can use for its protocol traffic.
- ✗
EIGRP will adjust the metric calculation to use 50% of the bandwidth.
Why it's wrong here
This command does not affect metric calculations; it only limits bandwidth usage.
- ✗
EIGRP will form neighbor adjacencies only when bandwidth usage is below 50%.
Why it's wrong here
The command does not control adjacency formation based on bandwidth usage.
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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JA
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.