hardMultiple ChoiceObjective-mapped
300-410 Practice Question: An engineer redistributes OSPF routes into EIGRP
An engineer redistributes OSPF routes into EIGRP. The OSPF routes have a metric of 20. After redistribution, the EIGRP topology table shows the routes but they are not installed in the routing table. The 'show ip eigrp topology' shows the route in active state. Which is the most likely explanation?
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
✓
The EIGRP neighbor is stuck-in-active because a query was sent but no reply was received due to a unidirectional link.
When redistributing into EIGRP, a seed metric must be specified. If not, the routes are redistributed with an infinite metric (e.g., 4294967295) and are not installed. However, the question says the route is in active state, which indicates a query is pending. This is an edge case where the route is redistributed with a valid metric but the EIGRP process is stuck-in-active due to a unidirectional link or a neighbor not replying to queries.
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 'default-metric' command was not configured, so the routes are redistributed with an infinite metric.
Why it's wrong here
Infinite metric would show the route in passive state but not installed.
- ✓
The EIGRP neighbor is stuck-in-active because a query was sent but no reply was received due to a unidirectional link.
Why this is correct
Active state indicates a query is outstanding, often due to a unidirectional link.
- ✗
The OSPF routes are external type 2, which are not redistributed by default.
Why it's wrong here
OSPF external routes are redistributed by default.
- ✗
The 'route-map' used for redistribution has a 'match ip address' that does not match the OSPF routes.
Why it's wrong here
If route-map denies, the route would not appear in topology table.
Visual reference
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.