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300-410 Practice Question: When redistributing routes into OSPF, which OSPF…
When redistributing routes into OSPF, which OSPF metric value is assigned by default if none is specified?
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
✓
20
Cisco IOS assigns a default metric of 20 to redistributed routes into OSPF, except for BGP routes which default to 1.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
1
Why it's wrong here
A default metric of 1 is used only for BGP routes redistributed into OSPF, not for other protocols.
- ✗
10
Why it's wrong here
10 is not a default metric for redistribution into OSPF; it is the default cost for certain OSPF interface types.
- ✓
20
Why this is correct
The default OSPF metric for redistributed routes is 20, as per Cisco IOS default behavior.
- ✗
100
Why it's wrong here
100 is not a default metric in OSPF redistribution; it may be used in EIGRP or other protocols.
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.