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300-410 Practice Question: Which TWO configuration steps are required to…
Which TWO configuration steps are required to successfully redistribute OSPF routes into EIGRP on a Cisco router? (Choose TWO.)
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
✓
Enter EIGRP router configuration mode using the 'router eigrp <as-number>' command.
Option A is correct because redistribution into EIGRP must be configured from within EIGRP router configuration mode, entered with the 'router eigrp <as-number>' command, where the 'redistribute ospf <process-id>' statement is then issued. Option D is correct because EIGRP requires a seed metric for redistributed routes; without it the routes are not installed, so you must supply bandwidth, delay, reliability, load, and MTU either via the 'default-metric' command or inline with the redistribute command. Option B is not required because a route-map is optional filtering, not a mandatory step for OSPF-to-EIGRP redistribution. Option C is wrong because 'redistribute eigrp' under OSPF router configuration mode performs the reverse direction (EIGRP into OSPF), not OSPF into EIGRP. Option E is wrong because 'default-information originate' only injects a default route into OSPF and is unrelated to redistributing OSPF routes into EIGRP.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enter EIGRP router configuration mode using the 'router eigrp <as-number>' command.
Why this is correct
Redistribution requires EIGRP to be running first, so entering EIGRP router configuration mode with 'router eigrp <as-number>' establishes the process that will receive the redistributed OSPF routes. Without this step, no EIGRP routing instance exists to accept them.
- ✗
Configure a route-map under OSPF to match OSPF routes for redistribution.
Why it's wrong here
A route-map under OSPF cannot match OSPF routes for redistribution into EIGRP; redistribution is configured under the EIGRP process, where the route-map is applied. Route-maps are correctly used to filter or set attributes on routes being redistributed, but the command belongs under the receiving protocol.
- ✗
Use the 'redistribute eigrp <as-number>' command under OSPF router configuration mode.
Why it's wrong here
The 'redistribute eigrp' command under OSPF router configuration mode injects EIGRP routes into OSPF, which is the reverse direction required. It is tempting because redistribution commands look symmetric, but the scenario demands OSPF routes entering EIGRP, configured under the EIGRP process.
- ✓
Set a seed metric for EIGRP using the 'default-metric' command or specify metric in the redistribute command.
Why this is correct
EIGRP requires a seed metric because redistributed OSPF routes arrive without EIGRP-compatible metric components such as bandwidth, delay and reliability. Supplying it via 'default-metric' or inline in the 'redistribute' statement lets the router assign a valid composite metric, without which the routes are not installed.
- ✗
Issue the 'default-information originate' command under OSPF to advertise redistributed routes.
Why it's wrong here
'default-information originate' advertises a default route into OSPF; it does not redistribute OSPF routes into EIGRP and is unrelated to the required direction. It is correctly used when an OSPF domain must learn a default route from an external source, not for inter-protocol redistribution.
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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