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300-410 Practice Question: Consider the following partial configuration on…

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.

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.

    Why this is correct

    The 'metric' keyword in the redistribute command sets the EIGRP metric for all redistributed routes.

  • OSPF routes redistributed into EIGRP will have a metric of 20 by default.

    Why it's wrong here

    The default metric for OSPF redistribution into EIGRP is not defined; the 'metric' keyword is required or a default-metric command must be used.

  • EIGRP routes redistributed into OSPF will be Type 1 external LSAs.

    Why it's wrong here

    By default, redistributed routes into OSPF are Type 2 external LSAs unless the 'metric-type' keyword is used.

  • 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.

Visual reference

R1 R2 R3 R4 10 100 10 100 OSPF picks R1→R2→R4 (cost 20) over R1→R3→R4 (cost 200)

Quick reference

Routing Protocol Comparison

ProtocolMetricMax HopsAlgorithmType
RIP v2Hop count15Bellman-FordDistance vector
OSPFCost (bandwidth)UnlimitedDijkstra (SPF)Link state
EIGRPComposite metricUnlimitedDUALHybrid
IS-ISCostUnlimitedDijkstraLink state
BGPPolicy / attributesUnlimitedPath vectorPath 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.