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Juniper JN0-351 Exam - Topic 6 Question 12 Discussion

Actual exam question for Juniper's JN0-351 exam
Question #: 12
Topic #: 6
[All JN0-351 Questions]

Exhibit.

Why is this OSPF adjacency remaining in this state?

Show Suggested Answer Hide Answer
Suggested Answer: B

The exhibit shows the output of the commandshow ospf neighbor, which displays information about the OSPF neighbors on a router1.

The output shows that the OSPF neighbor with the address 172.26.1.1 and the interface ge-0/0/3.0 is in the Exstart state1.

The Exstart state is the fourth state in the OSPF neighbor formation process, after Down, Init, and 2-Way states2.In this state, the OSPF neighbors establish a master-slave relationship and exchange database description (DBD) packets, which contain summaries of their link-state databases2.

The most common reason for OSPF neighbors to be stuck in the Exstart state is an MTU mismatch between the interfaces3.MTU stands for maximum transmission unit, which is the largest size of a packet that can be transmitted on a network segment4.If the MTU values of two OSPF neighbors are different, they may not be able to exchange DBD packets successfully, as some packets may be dropped or fragmented due to their size exceeding the MTU limit3.

To solve this problem, you need to ensure that the MTU values of both OSPF neighbors are the same or compatible.You can use the commandshow interfacesto display the MTU value of an interface5. You can also use the commandpingwith thedo-not-fragmentoption to test the MTU size between two routers.You can change the MTU value of an interface by using the commandset interfaces interface-name mtu mtu-valuein configuration mode5.


by Yolando at Feb 10, 2024, 06:02 AM

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Miesha
3 months ago
Nah, it's definitely not that.
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Gaynell
3 months ago
Surprised no one mentioned area ID mismatch!
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Aleisha
3 months ago
A hello interval mismatch could also be the issue.
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Karan
4 months ago
I think it's more likely an MTU mismatch.
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King
4 months ago
Definitely a subnet mask mismatch!
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Adela
4 months ago
I’m leaning towards area ID mismatch because I remember it being a common issue in OSPF adjacencies, but I could be mixing it up with something else.
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Alease
4 months ago
I feel like hello interval mismatches were mentioned in our study guide, but I can't recall if they were as common as the others.
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Dominque
4 months ago
I think I practiced a question similar to this where an MTU mismatch was the problem. Could that be the case here too?
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Jolene
5 months ago
I remember something about subnet mask mismatches causing OSPF issues, but I’m not entirely sure if that’s the right answer here.
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Goldie
5 months ago
I'm a bit unsure about this one. There are a few different factors that could be causing the adjacency to remain in this state. I'll need to carefully consider each option and try to eliminate the less likely ones.
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Nakita
5 months ago
I've seen this type of OSPF problem before. My best guess is that it's an area ID mismatch between the neighbors. That's usually the most common reason for an adjacency to get stuck in this state.
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An
5 months ago
Okay, let's see here. A subnet mask mismatch, MTU mismatch, hello interval mismatch, or area ID mismatch - those are the possibilities. I'll need to analyze the network diagram and configuration details to determine the most likely culprit.
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Ozell
5 months ago
Hmm, this looks like a tricky OSPF adjacency issue. I'll need to carefully review the options and think through the possible causes.
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Augustine
5 months ago
I'm pretty sure the answer is B. Process. The SIPOC model covers the key elements of a process, so the missing piece must be the "Process" step.
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Magdalene
5 months ago
Okay, let's see... I know fraud examiners can help trace illicit transactions, so I'll focus on that.
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Kina
5 months ago
This seems like a pretty straightforward question. The passage clearly states that the Scaffold class is used to implement the basic material design layout for a Flutter app, so I'm confident the answer is True.
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Nada
5 months ago
I think the HOME program is related to the Cranston-Gonzalez Act, but I'm not entirely sure.
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Chantay
5 months ago
Ah, I know this one! The bounded context is the foundation of microservices architecture, where you break down your application into independent, loosely coupled services. Option B is the correct answer.
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Weldon
2 years ago
I see your point, Lashawn. A hello interval mismatch could definitely be the issue here.
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Lashawn
2 years ago
I think it might be a hello interval mismatch that is causing the OSPF adjacency to remain in this state.
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Mireya
2 years ago
Yes, that's a good point Dylan. An MTU mismatch could also be the cause.
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Dylan
2 years ago
I beliMireya it could also be due to an MTU mismatch between the OSPF neighbors.
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Weldon
2 years ago
I agree with Mireya, a subnet mask mismatch can definitely cause this issue.
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Mireya
2 years ago
I think the OSPF adjacency is remaining in this state because of a subnet mask mismatch.
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Bev
2 years ago
I don't think so, I believe a hello interval mismatch is more likely to cause this problem.
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Rachael
2 years ago
What about an MTU mismatch? Could that be the reason?
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Marisha
2 years ago
I agree with Lazaro, a subnet mask mismatch can definitely cause this issue.
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Lazaro
2 years ago
I think the OSPF adjacency is remaining in this state because of a subnet mask mismatch.
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