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300-410 A network redistributes OSPF into EIGRP Practice Question
A network redistributes OSPF into EIGRP. Router R1 has: redistribute ospf 1 metric 10000 100 255 1 1500. Router R2 shows: show ip route eigrp includes some OSPF routes but not 192.168.1.0/24. What is the root cause?
⚠ Common exam trap
Cisco often tests the EIGRP feasibility condition by hiding it behind a metric misconfiguration—candidates mistakenly think the metric values are simply wrong or misordered, when the real issue is that the high delay causes the route to be suppressed by EIGRP's loop-prevention mechanism.
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 high delay metric (10000) may cause the route to be suppressed by EIGRP's feasibility condition.
C is correct because EIGRP uses a feasibility condition to prevent routing loops, which requires that the reported distance (RD) from a neighbor be strictly less than the feasible distance (FD). The redistribute command sets the EIGRP metric components in the order bandwidth, delay, reliability, load, MTU. Here, the delay is set to 10000 tens of microseconds, which is extremely high (100,000 microseconds). This high delay inflates the composite metric, making the FD very large. When this route is advertised to an EIGRP neighbor, the neighbor's RD may equal or exceed its own FD for that route, violating the feasibility condition and causing the route to be suppressed from the routing table.
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 OSPF route 192.168.1.0/24 is not in the OSPF database.
Why it's wrong here
If it were missing, no redistribution would occur; the issue is metric-related.
- ✗
The EIGRP metric components are misordered; delay should be 100, not 10000.
Why it's wrong here
The order is correct: bandwidth, delay, reliability, load, MTU.
- ✓
The high delay metric (10000) may cause the route to be suppressed by EIGRP's feasibility condition.
Why this is correct
EIGRP uses composite metric; high delay can make the route less feasible, preventing installation.
- ✗
Redistribution requires a route-map to filter specific routes.
Why it's wrong here
Redistribution without route-map still redistributes all OSPF routes.
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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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.