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Juniper Exam JN0-664 Topic 2 Question 47 Discussion

Actual exam question for Juniper's JN0-664 exam
Question #: 47
Topic #: 2
[All JN0-664 Questions]

Exhibit

Referring to the exhibit, you are receiving the 192.168 0 0/16 route on both R3 and R4 from your EBGP neighbor You must ensure that R1 and R2 receive both BGP routes from the route reflector

In this scenario, which BGP feature should you configure to accomplish this behavior?

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Suggested Answer: A

BGP add-path is a feature that allows the advertisement of multiple paths through the same peering session for the same prefix without the new paths implicitly replacing any previous paths. This behavior promotes path diversity and reduces multi-exit discriminator (MED) oscillations. BGP add-path is implemented by adding a path identifier to each path in the NLRI. The path identifier can be considered as something similar to a route distinguisher in VPNs, except that a path ID can apply to any address family.Path IDs are unique to a peering session and are generated for each network3. In this question, we have a route reflector (RR) that receives two routes for the same prefix (192.168.0.0/16) from an EBGP neighbor. By default, the RR will only advertise its best path to its clients (R1 and R2). However, we want R1 and R2 to receive both routes from the RR. To achieve this, we need to configure BGP add-path on the RR and enable it to send multiple paths for the same prefix to its clients.


by Eleonore at Apr 09, 2025, 07:27 PM

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Mona
5 days ago
Nah, I'm pretty sure it's C) multipath. That's the one that lets you load-balance traffic across multiple paths, isn't it?
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Detra
7 days ago
Hmm, I think the answer is A) add-path. That's the BGP feature that allows multiple paths to the same destination to be advertised, right?
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