mediumMultiple SelectObjective-mapped
300-410 Practice Question: Which TWO statements about route redistribution…
Which TWO statements about route redistribution between EIGRP and OSPF are true? (Choose TWO.)
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
✓
When redistributing EIGRP into OSPF, the OSPF metric must be explicitly configured if the default metric of 20 is not desired.
When redistributing between EIGRP and OSPF, the seed metric must be explicitly set for the receiving protocol. EIGRP uses a composite metric (bandwidth, delay, reliability, load, MTU) and OSPF uses a metric of type 1 or type 2. By default, OSPF assigns a metric of 20 to redistributed routes unless specified otherwise. Option A is correct because OSPF requires a seed metric for redistributed routes. Option D is correct because EIGRP redistributed routes default to an infinite metric (effectively not advertised) unless a seed metric is provided. Option B is incorrect because OSPF default metric is 20, not 1. Option C is incorrect because the default metric for EIGRP is not 100. Option E is incorrect because route-maps can be used to filter redistributed routes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
When redistributing EIGRP into OSPF, the OSPF metric must be explicitly configured if the default metric of 20 is not desired.
Why this is correct
Correct: OSPF uses a default metric of 20 for redistributed routes, so explicit configuration is needed to change it.
- ✗
When redistributing OSPF into EIGRP, the default EIGRP metric is 1.
Why it's wrong here
Incorrect: EIGRP does not have a default metric; routes are not redistributed unless a seed metric is set.
- ✗
When redistributing OSPF into EIGRP, the default EIGRP metric is 100.
Why it's wrong here
Incorrect: There is no default metric for EIGRP redistribution; it must be explicitly defined.
- ✓
When redistributing OSPF into EIGRP, a seed metric must be configured for EIGRP to advertise the redistributed routes.
Why this is correct
EIGRP does not inherit a default metric from redistributed routes, unlike OSPF which assigns a default metric of 20 for redistributed external routes. When redistributing OSPF into EIGRP, the administrator must explicitly configure a seed metric (bandwidth, delay, reliability, load, MTU) because EIGRP requires all redistributed routes to have a composite metric before they can be advertised. This satisfies the constraint that EIGRP will not advertise redistributed routes without a manually assigned seed metric.
- ✗
Route-maps cannot be used to filter routes during redistribution between EIGRP and OSPF.
Why it's wrong here
Incorrect: Route-maps are commonly used to filter and manipulate routes during redistribution.
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.
Go deeper
Related to this question
Learn chapter
OSPF Neighbor Adjacency and Basics
Key term
Route Redistribution Between Protocols
Route redistribution between protocols is the process of taking routes learned from one routing protocol and injecting them into another routing protocol so that networks using different protocols can communicate.
About these practice questions
Courseiva writes every 300-410 question from scratch — 1,966 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.