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Juniper Exam JN0-280 Topic 4 Question 4 Discussion

Actual exam question for Juniper's JN0-280 exam
Question #: 4
Topic #: 4
[All JN0-280 Questions]

You are creating an IP fabric underlay and want to use OSPF as your routing protocol.

In this scenario, which statement is correct?

Show Suggested Answer Hide Answer
Suggested Answer: C

When creating an IP fabric underlay using OSPF as the routing protocol, consistent interface speeds are important to ensure optimal traffic distribution and utilization of all links.

Step-by-Step Breakdown:

OSPF and Interface Speeds:

OSPF calculates the cost of a link based on its bandwidth. The default cost calculation in OSPF is:

If interface speeds vary significantly, OSPF may choose paths with lower cost (higher bandwidth), resulting in some links being underutilized.

Equal Utilization:

To ensure that all links are equally utilized in an IP fabric, it is recommended to maintain uniform interface speeds across the fabric. This ensures balanced load sharing across all available paths.

Juniper Reference:

IP Fabric with OSPF: Juniper recommends consistent interface speeds to maintain even traffic distribution and optimal link utilization in IP fabric underlay designs.


by Shaquana at Oct 18, 2024, 04:46 PM

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Cecily
2 months ago
Seriously, who comes up with these trick questions? I'm just going to go with my gut and choose C. Uniform interface speeds seem like the way to go.
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Shelton
29 days ago
No problem! It's always good to double-check these things when setting up a network.
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Louisa
1 months ago
Oh, I see. Thanks for clarifying. I'll keep that in mind for my IP fabric underlay.
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Son
2 months ago
Actually, in this scenario, all spine devices must use the same router ID. So D is the correct answer.
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Horace
2 months ago
I think C is the correct answer. Uniform interface speeds make sense for optimal utilization.
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Izetta
2 months ago
This is a tricky one, but I'd say the correct answer is D. Having the same router ID for all spine devices is crucial for OSPF.
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Mammie
2 months ago
I'm going with option A. Separating the leaf devices into different areas makes the most sense for scalability.
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Elenora
1 months ago
Definitely, separating leaf devices into different areas can help with network management and troubleshooting.
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Lisha
1 months ago
It's important to consider scalability when designing the IP fabric underlay.
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Nieves
1 months ago
I agree, having all leaf devices in separate OSPF areas can improve network performance.
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Daniela
2 months ago
Option A is a good choice. It helps with scalability by separating the leaf devices into different areas.
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Belen
3 months ago
Haha, option B is a joke, right? Like, who would really think you need the same device models for load-balancing in OSPF?
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Ressie
3 months ago
Option C sounds good to me. Matching interface speeds will ensure optimal load-balancing in the fabric.
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Remona
2 months ago
Yes, matching interface speeds will definitely help with efficient utilization of all links in the fabric.
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Blondell
2 months ago
It's important to have consistent speeds to prevent any bottlenecks in the network.
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Alise
2 months ago
I agree, having the same interface speeds will help distribute traffic evenly across the fabric.
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Fannie
2 months ago
Option C sounds good to me. Matching interface speeds will ensure optimal load-balancing in the fabric.
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Desirae
3 months ago
I disagree, I believe the correct statement is D) All spine devices must use the same router ID. This ensures consistency in the network.
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Mammie
3 months ago
I think the correct statement is A) All leaf devices must be configured in separate OSPF areas.
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Alona
3 months ago
I think option D is correct. All spine devices should use the same router ID for OSPF to work properly.
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Mi
2 months ago
C) Interface speeds should be the same throughout the fabric to ensure that all links are utilized.
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William
2 months ago
B) All leaf and spine devices must be the same model to ensure the proper load-balancing behavior.
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Corazon
2 months ago
A) All leaf devices must be configured in separate OSPF areas.
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