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300-410 Practice Question: Examine this partial configuration on Router R3:…
Examine this partial configuration on Router R3:
router ospf 1
redistribute rip subnets metric-type 1 metric 50
What is the effect of the 'metric-type 1' keyword?
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 RIP routes become OSPF Type 1 external LSAs, and the metric is the sum of the external metric (50) plus the internal OSPF cost to the ASBR.
The metric-type 1 keyword makes the redistributed routes Type 1 external LSAs, which add the internal OSPF cost to the external metric. Type 2 (default) does not add internal cost.
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 RIP routes become OSPF Type 1 external LSAs, and the metric is the sum of the external metric (50) plus the internal OSPF cost to the ASBR.
Why this is correct
Type 1 external LSAs add internal OSPF cost to the external metric.
- ✗
Redistributed RIP routes become OSPF Type 2 external LSAs with a fixed metric of 50.
Why it's wrong here
The metric-type 1 overrides the default Type 2.
- ✗
The 'metric-type 1' is ignored because the 'metric' keyword is also used.
Why it's wrong here
Both keywords are valid and work together.
- ✗
The redistributed routes will have a metric of 50 and will not be affected by internal OSPF cost.
Why it's wrong here
That describes Type 2, not Type 1.
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
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