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Ericsson ECP-206 Exam - Topic 2 Question 58 Discussion

What network information is, without additional configuration, shared between two iBGP neighbors by default?
C) BGP routes learned from eBGP neighbors
A) BGP routes learned from an OSPF neighbor
B) IP address information of loopback interfaces
D) IP address information from all directly connected interfaces

Ericsson ECP-206 Exam - Topic 2 Question 58 Discussion

Actual exam question for Ericsson's ECP-206 exam
Question #: 58
Topic #: 2
[All ECP-206 Questions]

What network information is, without additional configuration, shared between two iBGP neighbors by default?

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Suggested Answer: C

iBGP works by exchanging routing information between two or more routers within an AS. Each router sends its own routing table to its neighbors, which contains information about the networks it knows and how they can be reached from that router. By default, iBGP neighbors only share BGP routes learned from eBGP neighbors, which are routers in different ASes. This is because iBGP assumes that all routers within an AS have consistent internal routing information provided by an IGP, such as OSPF or IS-IS. Therefore, iBGP neighbors do not need to share IP address information of loopback interfaces or directly connected interfaces, unless explicitly configured to do so by using commands such as neighbor update-source or network.


by Harrison at Jun 21, 2026, 12:54 AM

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Sang
3 days ago
I agree with C too. eBGP routes make sense in iBGP.
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Matthew
8 days ago
I feel like it's B. Loopback IPs are crucial for stability.
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Susy
14 days ago
I think it's C. eBGP routes are shared by default.
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Odette
19 days ago
I was surprised to learn that too!
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Samira
24 days ago
Definitely not A, it's all about eBGP routes.
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Daniel
29 days ago
Wait, are you sure? I thought it was A.
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Nadine
1 month ago
Totally agree, that's the default behavior!
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Junita
1 month ago
It's C, BGP routes from eBGP neighbors.
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Evangelina
1 month ago
I thought iBGP only shared routes, not IP address info from interfaces. This question is a bit tricky!
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Pura
2 months ago
Pretty sure the answer is C, since iBGP is supposed to carry routes from eBGP, right? I feel like I've seen a similar question before.
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Sheridan
2 months ago
I remember something about loopback interfaces, but I can't recall if that info is shared without extra config.
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Earleen
2 months ago
I think iBGP neighbors share routes learned from eBGP neighbors by default, but I'm not entirely sure if that's the only thing.
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