- A
BGP is not receiving any routes, possibly due to filtering.
Correct. BGP shows 0 networks and 0 subnets, meaning no routes are being received, likely due to filtering.
- B
EIGRP is redistributing routes into OSPF.
Why wrong: The summary does not show redistribution; it only shows route counts per source.
- C
OSPF has more routes than EIGRP.
Incorrect. Although OSPF has numerically more routes, the question focuses on redistribution troubleshooting, and the absence of BGP routes is more relevant.
- D
The router has a total of 13 routes.
Why wrong: The total shows 3 networks and 10 subnets, which is 13 routes, but the question asks what the output indicates. Both A and C are correct, but A is more relevant to troubleshooting filtering.
Question 2,144 of 2,152
300-410 Routing table summary output Practice Question
This 300-410 practice question tests your understanding of route maps and route filtering. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: routing table summary output. 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.
A network engineer runs the following command to troubleshoot redistribution with route-maps:
R1# show ip route summary IP routing table name: Default-IP-Routing-Table(0) IP routing table maximum-paths: 32
Route Source Networks Subnets Replicates Overhead Memory (bytes) connected 0 3 0 0 480 static 0 0 0 0 0 ospf 1 2 5 0 0 1280 eigrp 100 1 2 0 0 640 bgp 65000 0 0 0 0 0 internal 2 Total 3 10 0 0 2400
What does this output indicate?
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
✓
BGP is not receiving any routes, possibly due to filtering.
The output shows that BGP has zero routes, indicating BGP is not receiving any routes, possibly due to filtering. This is the most significant finding for troubleshooting redistribution. While OSPF does have more routes than EIGRP numerically, that is not directly indicative of redistribution issues and is not the primary takeaway.
Key principle: Routing table summary output
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
BGP is not receiving any routes, possibly due to filtering.
Why this is correct
Correct. BGP shows 0 networks and 0 subnets, meaning no routes are being received, likely due to filtering.
Related concept
Routing table summary output
- ✗
EIGRP is redistributing routes into OSPF.
Why it's wrong here
The summary does not show redistribution; it only shows route counts per source.
- ✓
OSPF has more routes than EIGRP.
- ✗
The router has a total of 13 routes.
Why it's wrong here
The total shows 3 networks and 10 subnets, which is 13 routes, but the question asks what the output indicates. Both A and C are correct, but A is more relevant to troubleshooting filtering.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
The summary does not show redistribution; it only shows route counts per source.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Routing table summary output
- BGP route filtering
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
Routing table summary output
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.
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.
What to study next
Got this wrong? Here's your next step.
Review routing table summary output, then practise related 300-410 questions on the same topic to reinforce the concept.
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Route Maps and Route Filtering — study guide chapter
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FAQ
Questions learners often ask
What does this 300-410 question test?
Route Maps and Route Filtering — This question tests Route Maps and Route Filtering — Routing table summary output.
What is the correct answer to this question?
The correct answer is: BGP is not receiving any routes, possibly due to filtering. — The output shows that BGP has zero routes, indicating BGP is not receiving any routes, possibly due to filtering. This is the most significant finding for troubleshooting redistribution. While OSPF does have more routes than EIGRP numerically, that is not directly indicative of redistribution issues and is not the primary takeaway.
What should I do if I get this 300-410 question wrong?
Review routing table summary output, then practise related 300-410 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Routing table summary output
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Last reviewed: Jun 18, 2026
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