VMware Exam 5V0-21.21 Topic 2 Question 65 Discussion

Actual exam question for VMware's 5V0-21.21 exam

Question #: 65
Topic #: 2

As a part of a network hardware refresh project, all the network switches have been replaced with a newer, high-performance model. After the replacement, the company users started experiencing slowness on the applications hosted on their vSAN-backed VMs.

The vSAN administrator checked the vSAN Network Health status and noticed that the "Hosts large ping test" has failed.

What could be the cause of this performance degradation issue?

AMTU 9K is not configured on the hosts vSAN vMKernel ports.

BMTU 9K is not configured on the hosts VMnic ports.

CMTU 9K is not configured on the ToR switch.

DMTU 9K is not configured on the vDS switch.

Show Suggested Answer

Suggested Answer: C

https://kb.vmware.com/s/article/2108285

by Almeta at Aug 07, 2024, 12:25 AM

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King

2 months ago

I believe it's more likely to be the vSAN vMKernel ports, as that directly affects the vSAN network health.

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Marjory

2 months ago

But what if it's actually MTU 9K not configured on the hosts VMnic ports?

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Kristofer

2 months ago

I think it's a combination of B and C. The hosts and the ToR switch need to be on the same page for this to work smoothly.

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Jettie

2 months ago

Ah, the age-old question of the perfect MTU size. I heard 9001 is the way to go - just to be extra sure.

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Larae

2 months ago

I bet it's option D. The vDS switch needs to be configured with the same MTU as the physical switches to ensure seamless communication.

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Vi

2 months ago

I agree with you, option A seems like the most likely cause of the performance degradation issue.

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Twanna

2 months ago

I think it might be option A. The vSAN vMKernel ports need to have the correct MTU configured for optimal performance.

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Nu

2 months ago

I agree with Mollie, that could definitely be the issue causing the performance degradation.

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Mollie

3 months ago

I think the cause could be MTU 9K not configured on the hosts vSAN vMKernel ports.

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Tamera

3 months ago

Nah, I'd go with option C. The ToR switch is the choke point here, and if the MTU isn't set correctly, it's bound to cause performance issues.

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Nathalie

3 months ago

Hmm, I think it's gotta be option B. The vSAN vMKernel ports need to match the MTU of the new switches, right?

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Reuben

2 months ago

Yeah, the MTU on the vSAN vMKernel ports should match the new switches for optimal performance.

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Ilona

2 months ago

I agree, option B seems like the most likely cause.

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Royal

3 months ago

I think we should focus on checking both options A and B to ensure the correct MTU configuration is in place for optimal performance.

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Eladia

3 months ago

I believe option B could also be a possible cause, if the MTU 9K is not configured on the hosts VMnic ports.

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Miriam

3 months ago

I agree with Jolanda, having the correct MTU configuration on the vSAN vMKernel ports is crucial for performance.

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Jolanda

4 months ago

I think the cause could be option A, MTU 9K not configured on the hosts vSAN vMKernel ports.

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