- A
show ip protocols
This shows redistribution settings, route maps, and administrative distances, helping identify misconfigurations.
- B
show ip route
Why wrong: This only shows the final routing table, not the reason routes are missing.
- C
show ip eigrp topology all-links
This displays all routes in the EIGRP topology table, including those not installed due to metric or filter issues.
- D
show ip ospf database
Why wrong: This is an OSPF command, not relevant to EIGRP redistribution.
- E
debug ip routing
Why wrong: This is a general routing debug, not EIGRP-specific, and can be overwhelming for targeted troubleshooting.
Question 478 of 2,152
300-410 EIGRP Troubleshooting Practice Question
This 300-410 practice question tests your understanding of eigrp troubleshooting. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO commands can be used to troubleshoot EIGRP route redistribution issues when routes are not appearing in the routing table? (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
✓
show ip protocols
The 'show ip protocols' command (A) is correct because it displays the routing protocol configuration, including redistribution settings such as the metric, route map, and which protocols are being redistributed. When EIGRP routes are missing from the routing table, this command helps verify that redistribution is correctly configured and active, which is a primary troubleshooting step for redistribution issues.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
show ip protocols
Why this is correct
This shows redistribution settings, route maps, and administrative distances, helping identify misconfigurations.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
show ip route
Why it's wrong here
This only shows the final routing table, not the reason routes are missing.
- ✓
show ip eigrp topology all-links
- ✗
show ip ospf database
- ✗
debug ip routing
Why it's wrong here
This is a general routing debug, not EIGRP-specific, and can be overwhelming for targeted troubleshooting.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between 'show ip eigrp topology' and 'show ip eigrp topology all-links', where the latter is necessary to see all routes, including those not selected as best paths, which is critical for troubleshooting redistribution failures.
Trap categories for this question
Command / output trap
This only shows the final routing table, not the reason routes are missing.
Detailed technical explanation
How to think about this question
The 'show ip eigrp topology all-links' command (C) is correct because it displays all EIGRP routes in the topology table, including feasible successors and routes that may not be installed in the routing table due to metric or administrative distance issues. In redistribution scenarios, this command helps identify whether the redistributed routes are being learned by EIGRP but not installed, which often points to a metric mismatch or a missing 'default-metric' command, a common pitfall when redistributing into EIGRP.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
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.
What to study next
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FAQ
Questions learners often ask
What does this 300-410 question test?
EIGRP Troubleshooting — This question tests EIGRP Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: show ip protocols — The 'show ip protocols' command (A) is correct because it displays the routing protocol configuration, including redistribution settings such as the metric, route map, and which protocols are being redistributed. When EIGRP routes are missing from the routing table, this command helps verify that redistribution is correctly configured and active, which is a primary troubleshooting step for redistribution issues.
What should I do if I get this 300-410 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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