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Juniper JN0-664 Exam - Topic 2 Question 30 Discussion

ExhibitCE-1 and CE-2 are part of a VPLS called Customer1 No connectivity exists between CE-1 and CE-2. In the process of troubleshooting, you notice PE-1 is not learning any routes for this VPLS from PE-2, and PE-2 is not learning any routes for this VPLS from PE-1.
A) The route target must match on PE-1 and PE-2.
B) The route distinguisher must match on PE-1 and PE-2.
C) The instance type should be changed to I2vpn.
D) The no-tunnel-services statement should be deleted on both PEs.

Juniper JN0-664 Exam - Topic 2 Question 30 Discussion

Actual exam question for Juniper's JN0-664 exam
Question #: 30
Topic #: 2
[All JN0-664 Questions]

Exhibit

CE-1 and CE-2 are part of a VPLS called Customer1 No connectivity exists between CE-1 and CE-2. In the process of troubleshooting, you notice PE-1 is not learning any routes for this VPLS from PE-2, and PE-2 is not learning any routes for this VPLS from PE-1.

Show Suggested Answer Hide Answer
Suggested Answer: A

VPLS is a technology that provides Layer 2 VPN services over an MPLS network. VPLS uses BGP as its control protocol to exchange VPN membership information between PE routers. The route target is a BGP extended community attribute that identifies which VPN a route belongs to. The route target must match on PE routers that participate in the same VPLS instance, otherwise they will not accept or advertise routes for that VPLS.


by Merilyn at Jul 18, 2024, 12:05 PM

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Ming
7 months ago
Surprised there's no connectivity at all!
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Melissa
8 months ago
I’m not sure about C, that seems off.
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Casie
8 months ago
Wait, could it be B instead?
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Luisa
8 months ago
I think it's definitely A.
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Edgar
8 months ago
Route target matching is crucial for VPLS.
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Fannie
9 months ago
I feel like the instance type being set to I2vpn might be relevant, but I don't have a clear example from my studies to back that up.
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Tawanna
9 months ago
The no-tunnel-services statement sounds familiar, but I can't remember if it applies to this scenario or not.
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Nieves
9 months ago
I think I practiced a question where the route distinguisher was the problem, but I can't recall the specifics.
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Isidra
9 months ago
I remember something about route targets needing to match for VPLS to work correctly, but I'm not entirely sure if that's the main issue here.
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Shawn
9 months ago
I'm a bit confused on this one. Is it possible the instance type needs to be changed to I2vpn? Or could the no-tunnel-services statement be causing the problem?
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Arlie
9 months ago
Ah, I got this. The route target must be the issue here. That's the first thing I'd check to make sure it's configured correctly and matching on both PE-1 and PE-2.
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Larae
9 months ago
Okay, let's see. The key seems to be that PE-1 and PE-2 are not learning any routes for this VPLS from each other. I'm thinking the route target or route distinguisher configuration could be the problem.
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Chauncey
9 months ago
Hmm, this seems like a tricky VPLS issue. I'll need to carefully review the information provided and think through the possible causes.
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Pamella
9 months ago
Alright, time to put on my troubleshooting hat. I'll start by verifying the route target and route distinguisher configurations on both PE routers. That seems like the most likely culprit based on the information provided.
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Hester
9 months ago
I think the answer is material properties. The vibration characteristics and the inherent properties of the components both play a crucial role in vibration-induced fatigue. I'm feeling confident about this one.
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Renea
9 months ago
I remember a practice question similar to this! I think "all of the above" could be a strong answer since they all seem relevant to protecting from liability.
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Rosenda
10 months ago
Hmm, this looks like it's asking about code quality tools for Java. I think I remember learning about PMD, which can detect issues like unused variables and empty catch blocks. I'll go with option B.
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Alease
2 years ago
Haha, changing the instance type to I2vpn? Really? That's like trying to fit a square peg in a round hole. Not gonna work, buddy!
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Devorah
2 years ago
Hmm, I'm not sure about that. What if the route distinguisher is the problem? That could be causing the connectivity issues between PE-1 and PE-2.
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Bong
2 years ago
I agree with Carin. The route target is the key to VPLS connectivity, so that's the first thing I'd check.
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Remedios
2 years ago
D) The no-tunnel-services statement should be deleted on both PEs.
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Carlene
2 years ago
C) The instance type should be changed to l2vpn.
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Carissa
2 years ago
B) The route distinguisher must match on PE-1 and PE-2.
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Eveline
2 years ago
A) The route target must match on PE-1 and PE-2.
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Roxanne
2 years ago
B) I think the route distinguisher must match on PE-1 and PE-2.
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Lakeesha
2 years ago
A) The route target must match on PE-1 and PE-2.
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Annamae
2 years ago
I think we should check both the route target and route distinguisher to be sure.
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Tasia
2 years ago
It's possible, but I think the route target is more likely the culprit.
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Mona
2 years ago
But what about the route distinguisher? Could that also be causing the problem?
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Carin
2 years ago
The route target must match on PE-1 and PE-2. That's the obvious issue here.
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German
2 years ago
D) The no-tunnel-services statement should be deleted on both PEs.
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Trinidad
2 years ago
C) The instance type should be changed to I2vpn.
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Myra
2 years ago
B) The route distinguisher must match on PE-1 and PE-2.
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Matt
2 years ago
A) The route target must match on PE-1 and PE-2.
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Annamae
2 years ago
I agree, if the route target doesn't match, the PEs won't learn the routes.
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Tasia
2 years ago
I think the issue might be with the route target.
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