- A
Configure a network statement under BGP to advertise the prefix.
Why wrong: Network statements advertise prefixes but do not fix next-hop issues.
- B
Apply the neighbor next-hop-self command under the BGP router configuration for the EBGP neighbor.
This forces the router to use its own IP as the next hop for routes advertised to the neighbor.
- C
Increase the EBGP multihop TTL using the neighbor ebgp-multihop command.
Why wrong: This addresses TTL issues, not next-hop reachability.
- D
Ensure the next-hop IP is reachable via an IGP or static route on the advertising router.
If the next hop is reachable, the route can be advertised without modification.
- E
Use the neighbor update-source command to change the source IP of BGP updates.
Why wrong: This changes the source IP, not the next-hop attribute.
300-410 BGP Troubleshooting Practice Question
This 300-410 practice question tests your understanding of bgp 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 configuration steps are required to troubleshoot and fix a BGP route that is not being advertised to an EBGP neighbor due to the next-hop-self issue? (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
Apply the neighbor next-hop-self command under the BGP router configuration for the EBGP neighbor.
The next-hop-self command on the EBGP neighbor or the IBGP peer (if the route is from IBGP) ensures the next hop is set to the local router's address. Alternatively, if the next hop is reachable via an IGP, no change is needed. Option A is incorrect because network statements do not affect next-hop. Option C is incorrect because EBGP multihop is for TTL issues. Option E is incorrect because the update-source command sets the source IP, not the next hop.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure a network statement under BGP to advertise the prefix.
Why it's wrong here
Network statements advertise prefixes but do not fix next-hop issues.
- ✓
Apply the neighbor next-hop-self command under the BGP router configuration for the EBGP neighbor.
Why this is correct
This forces the router to use its own IP as the next hop for routes advertised to the neighbor.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
Increase the EBGP multihop TTL using the neighbor ebgp-multihop command.
Why it's wrong here
This addresses TTL issues, not next-hop reachability.
- ✓
Ensure the next-hop IP is reachable via an IGP or static route on the advertising router.
Why this is correct
If the next hop is reachable, the route can be advertised without modification.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
Use the neighbor update-source command to change the source IP of BGP updates.
Why it's wrong here
This changes the source IP, not the next-hop attribute.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
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.
What to study next
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
- →
BGP Troubleshooting — study guide chapter
Learn the concepts, then practise the questions
- →
BGP Troubleshooting practice questions
Targeted practice on this topic area only
- →
All 300-410 questions
2,152 questions across all exam domains
- →
Cisco CCNP ENARSI 300-410 study guide
Full concept coverage aligned to exam objectives
- →
300-410 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related 300-410 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Layer 3 Technologies practice questions
Practise 300-410 questions linked to Layer 3 Technologies.
EIGRP Troubleshooting practice questions
Practise 300-410 questions linked to EIGRP Troubleshooting.
OSPF Troubleshooting (v2/v3) practice questions
Practise 300-410 questions linked to OSPF Troubleshooting (v2/v3).
BGP Troubleshooting practice questions
Practise 300-410 questions linked to BGP Troubleshooting.
Route Redistribution practice questions
Practise 300-410 questions linked to Route Redistribution.
Policy-Based Routing (PBR) practice questions
Practise 300-410 questions linked to Policy-Based Routing (PBR).
VRF-Lite practice questions
Practise 300-410 questions linked to VRF-Lite.
Route Maps and Route Filtering practice questions
Practise 300-410 questions linked to Route Maps and Route Filtering.
Administrative Distance practice questions
Practise 300-410 questions linked to Administrative Distance.
Route Summarization practice questions
Practise 300-410 questions linked to Route Summarization.
Bidirectional Forwarding Detection (BFD) practice questions
Practise 300-410 questions linked to Bidirectional Forwarding Detection (BFD).
VPN Technologies practice questions
Practise 300-410 questions linked to VPN Technologies.
Practice this exam
Start a free 300-410 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this 300-410 question test?
BGP Troubleshooting — This question tests BGP Troubleshooting — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: Apply the neighbor next-hop-self command under the BGP router configuration for the EBGP neighbor. — The next-hop-self command on the EBGP neighbor or the IBGP peer (if the route is from IBGP) ensures the next hop is set to the local router's address. Alternatively, if the next hop is reachable via an IGP, no change is needed. Option A is incorrect because network statements do not affect next-hop. Option C is incorrect because EBGP multihop is for TTL issues. Option E is incorrect because the update-source command sets the source IP, not the next hop.
What should I do if I get this 300-410 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 18, 2026
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.