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300-410 Practice Question: Which THREE symptoms indicate a problem with…
Which THREE symptoms indicate a problem with route redistribution causing suboptimal routing or routing loops? (Choose THREE.)
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
✓
Routing loops occur where packets traverse multiple routers repeatedly.
Route redistribution issues often manifest as routing loops, suboptimal paths, or missing routes. A routing loop (option A) occurs when redistributed routes are re-injected back into the source protocol. Suboptimal routing (option B) happens when a router prefers a redistributed route over a more direct one. Missing routes (option D) can occur if redistribution is not configured or if filters block routes. Option C is incorrect because high CPU may indicate many things, not specifically redistribution. Option E is incorrect because a stable routing table does not indicate a problem.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Routing loops occur where packets traverse multiple routers repeatedly.
Why this is correct
Correct: This is a classic symptom of mutual redistribution without proper filtering.
- ✓
Traffic from one area takes a longer path than expected, even though a shorter path exists within the same routing domain.
Why this is correct
Correct: This indicates that a redistributed route is preferred over an internal route, often due to administrative distance issues.
- ✗
CPU utilization on the redistribution router is consistently below 50%.
Why it's wrong here
Incorrect: Low CPU is not a symptom of redistribution problems.
- ✓
Some networks are not reachable from certain parts of the network, even though they are present in the routing table of the redistribution router.
Why this is correct
Correct: This can happen if redistribution is not configured on all required routers or if filters block routes.
- ✗
The routing table on all routers is stable and converges quickly after a topology change.
Why it's wrong here
Incorrect: Stable convergence is a sign of a healthy network, not a problem.
Go deeper
Related to this question
Learn chapter
OSPF Route Summarization and Filtering
Key term
Route Redistribution Between Protocols
Route redistribution between protocols is the process of taking routes learned from one routing protocol and injecting them into another routing protocol so that networks using different protocols can communicate.
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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.