The correct answer is that R1 is advertising 192.168.10.0/24 to neighbor 10.1.1.2 and learning 10.2.2.0/24 from the same neighbor. This is determined by interpreting the debug ip bgp updates output, where the "UPDATE out" line shows R1 sending the 192.168.10.0/24 prefix with an AS path of 65000 65001, while the "UPDATE in" line shows R1 receiving the 10.2.2.0/24 prefix with an AS path of 65002. On the Cisco CCNP ENARSI 300-410 exam, this type of output tests your ability to distinguish between outbound and inbound BGP updates during route redistribution troubleshooting, with a common trap being to misread the direction of the update or overlook the AS path as an indicator of the route’s origin. A useful memory tip is to remember that "out" means your router is speaking, and "in" means your router is listening—so focus on the direction keyword and the AS path to confirm whether redistribution is actually injecting the expected routes.
300-410 Route Redistribution Practice Question
This 300-410 practice question tests your understanding of route redistribution. 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.
A network engineer runs the following command to troubleshoot a Route Redistribution issue:
R1# debug ip bgp updates
And sees the following output:
*Mar 1 00:25:44.789: BGP(0): 10.1.1.2 UPDATE out about 192.168.10.0/24, NEXT_HOP 10.1.1.1, LOCAL_PREF 100, MED 0, origin i, path 65000 65001
*Mar 1 00:25:44.790: BGP(0): 10.1.1.2 UPDATE run, update sent
*Mar 1 00:25:44.791: BGP(0): 10.1.1.2 UPDATE in about 10.2.2.0/24, NEXT_HOP 10.1.1.2, LOCAL_PREF 100, MED 0, origin i, path 65002
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
R1 is advertising 192.168.10.0/24 to neighbor 10.1.1.2 and learning 10.2.2.0/24 from the same neighbor.
The debug ip bgp updates output shows BGP updates being sent and received. R1 sends an update for 192.168.10.0/24 with AS path 65000 65001 and receives an update for 10.2.2.0/24 with AS path 65002. This indicates BGP is exchanging routes, but if redistribution is expected, the AS path may indicate the route origin.
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.
✗
BGP is redistributing routes from OSPF into BGP, as shown by the AS path.
Why it's wrong here
The AS path 65000 65001 suggests the route originated from AS 65001, not necessarily redistributed from OSPF.
✓
R1 is advertising 192.168.10.0/24 to neighbor 10.1.1.2 and learning 10.2.2.0/24 from the same neighbor.
Why this is correct
The output shows outbound update for 192.168.10.0/24 and inbound update for 10.2.2.0/24, indicating BGP peering is working.
The route 192.168.10.0/24 is being filtered due to AS path length.
Why it's wrong here
No filtering is indicated; the update is sent out.
✗
BGP is not receiving any routes because of a redistribution issue.
Why it's wrong here
The router is receiving an update for 10.2.2.0/24, so BGP is receiving routes.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
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.
Route Redistribution — This question tests Route Redistribution — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: R1 is advertising 192.168.10.0/24 to neighbor 10.1.1.2 and learning 10.2.2.0/24 from the same neighbor. — The debug ip bgp updates output shows BGP updates being sent and received. R1 sends an update for 192.168.10.0/24 with AS path 65000 65001 and receives an update for 10.2.2.0/24 with AS path 65002. This indicates BGP is exchanging routes, but if redistribution is expected, the AS path may indicate the route origin.
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 →
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.
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.