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Question 52 - JN0-683 discussion

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You are deploying a Clos IP fabric with an oversubscription ratio of 3:1.

In this scenario, which two statements are correct? (Choose two.)

A.
The oversubscription ratio remains the same when you remove spine devices.
Answers
A.
The oversubscription ratio remains the same when you remove spine devices.
B.
The oversubscription ratio decreases when you add spine devices.
Answers
B.
The oversubscription ratio decreases when you add spine devices.
C.
The oversubscription ratio increases when you remove spine devices.
Answers
C.
The oversubscription ratio increases when you remove spine devices.
D.
The oversubscription ratio remains the same when you add spine devices.
Answers
D.
The oversubscription ratio remains the same when you add spine devices.
Suggested answer: B, C

Explanation:

Understanding Oversubscription in a Clos Fabric:

The oversubscription ratio in a Clos IP fabric measures the ratio of the amount of edge (leaf) bandwidth to the core (spine) bandwidth. An oversubscription ratio of 3:1 means that there is three times more edge bandwidth compared to core bandwidth.

Impact of Adding/Removing Spine Devices:

Option C: If you remove spine devices, the total available core bandwidth decreases, while the edge bandwidth remains the same. This results in an increase in the oversubscription ratio because there is now less core bandwidth to handle the same amount of edge traffic.

Option B: Conversely, if you add spine devices, the total core bandwidth increases. This decreases the oversubscription ratio because more core bandwidth is available to handle the edge traffic.

Conclusion:

Option C: Correct---Removing spine devices increases the oversubscription ratio.

Option B: Correct---Adding spine devices decreases the oversubscription ratio.

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asked 18/09/2024
shafinaaz hossenny
37 questions
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