- A
Redistributed OSPF routes into EIGRP will have a default metric of 10000 100 255 1 1500.
The 'metric' keyword in the redistribute command sets the EIGRP metric for all redistributed routes.
- B
OSPF routes redistributed into EIGRP will have a metric of 20 by default.
Why wrong: The default metric for OSPF redistribution into EIGRP is not defined; the 'metric' keyword is required or a default-metric command must be used.
- C
EIGRP routes redistributed into OSPF will be Type 1 external LSAs.
Why wrong: By default, redistributed routes into OSPF are Type 2 external LSAs unless the 'metric-type' keyword is used.
- D
The 'subnets' keyword in OSPF redistribution is optional but recommended.
Why wrong: Without 'subnets', only classful networks are redistributed, which is often not desired. The 'subnets' keyword is not optional if you want all prefixes.
300-410 Route Redistribution Practice Question
This 300-410 practice question tests your understanding of route redistribution. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Consider the following partial configuration on Router R1:
router eigrp 100
redistribute ospf 1 metric 10000 100 255 1 1500
router ospf 1
redistribute eigrp 100 subnets
Which statement about this configuration is true?
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
Redistributed OSPF routes into EIGRP will have a default metric of 10000 100 255 1 1500.
The configuration redistributes OSPF routes into EIGRP with specific bandwidth, delay, reliability, load, and MTU metrics. The 'subnets' keyword in OSPF redistribution ensures that all subnets (including classless prefixes) are redistributed. Without 'subnets', only classful networks are redistributed.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Redistributed OSPF routes into EIGRP will have a default metric of 10000 100 255 1 1500.
- ✗
OSPF routes redistributed into EIGRP will have a metric of 20 by default.
- ✗
EIGRP routes redistributed into OSPF will be Type 1 external LSAs.
- ✗
The 'subnets' keyword in OSPF redistribution is optional but recommended.
Why it's wrong here
Without 'subnets', only classful networks are redistributed, which is often not desired. The 'subnets' keyword is not optional if you want all prefixes.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Trap categories for this question
Keyword trap
The default metric for OSPF redistribution into EIGRP is not defined; the 'metric' keyword is required or a default-metric command must be used.
Command / output trap
The default metric for OSPF redistribution into EIGRP is not defined; the 'metric' keyword is required or a default-metric command must be used.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this 300-410 question test?
Route Redistribution — This question tests Route Redistribution — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: Redistributed OSPF routes into EIGRP will have a default metric of 10000 100 255 1 1500. — The configuration redistributes OSPF routes into EIGRP with specific bandwidth, delay, reliability, load, and MTU metrics. The 'subnets' keyword in OSPF redistribution ensures that all subnets (including classless prefixes) are redistributed. Without 'subnets', only classful networks are redistributed.
What should I do if I get this 300-410 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Last reviewed: Jun 18, 2026
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.
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