hardMultiple ChoiceObjective-mapped
300-410 R1 and R2 are iBGP peers in AS 65001 Practice Question
R1 and R2 are iBGP peers in AS 65001. R1 has: neighbor 10.1.1.2 route-reflector-client. R2 advertises a prefix 192.168.1.0/24 with next-hop 10.1.1.2. R3, another iBGP speaker not a client of R1, receives the prefix but the next-hop is unchanged (10.1.1.2) and R3 cannot reach it because 10.1.1.2 is not directly connected. R1 has no other configuration. What is the root cause?
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
✓
R1 is missing the next-hop-self configuration for its non-client peer R3, so the next-hop remains R2, which is not reachable by R3.
When a route reflector reflects a route from a client to a non-client, it does not modify the next-hop attribute by default. The next-hop remains the original router (R2). If the non-client (R3) does not have a route to that next-hop, the prefix is considered unreachable. The fix is to use next-hop-self on the route reflector for non-client peers, or ensure reachability to the next-hop. The root cause is that R1 is not configured with neighbor 10.1.1.3 next-hop-self for the non-client peer.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
R1 is missing the next-hop-self configuration for its non-client peer R3, so the next-hop remains R2, which is not reachable by R3.
Why this is correct
Route reflectors do not change next-hop for reflected routes; next-hop-self is needed on the reflector for non-clients.
- ✗
R2 should have sent the route with next-hop-self to R1.
Why it's wrong here
R2 is the originator; it can set next-hop-self but that is not required.
- ✗
R3 is missing a static route to 10.1.1.2.
Why it's wrong here
While that could fix reachability, the root cause is the missing next-hop-self on R1 for R3.
- ✗
The route-reflector-client command should be applied on R2 instead.
Why it's wrong here
R1 is the route reflector; client is correct on R1 for R2.
Go deeper
Related to this question
Learn chapter
OSPF Neighbor Adjacency and Basics
Key term
BGP Route Reflector
A BGP Route Reflector is a networking device that reduces the number of BGP peer connections needed in a large network by allowing routers to share routing information without needing to connect to every other router directly.
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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.