Nutanix Exam NCS-Core Topic 2 Question 60 Discussion

Actual exam question for Nutanix's NCS-Core exam

Question #: 60
Topic #: 2

A consultant installs a new AHV cluster and moves the cluster into the customer's environment. Alter the move, the consultants notice that traffic is not being balanced across the physical NICs. The ToR switches have been configured with LACP.

Within Prism Element, which AHV network option should be set to resolve the issue?

AActive-Backup

BActive-Active

CNo Uplink Bond

DActive-Active with MAC Pinning

Show Suggested Answer

Suggested Answer: B

In a situation where traffic is not being balanced across the physical NICs and the Top-of-Rack (ToR) switches have been configured with LACP (Link Aggregation Control Protocol), the appropriate AHV network configuration to resolve this issue within Prism Element is 'Active-Active.' This setting enables both NICs to actively handle traffic, which, combined with LACP, allows for load balancing and redundancy, effectively utilizing all available network paths. This setup ensures that traffic is spread evenly across the physical NICs, maximizing network throughput and resilience.

Nutanix Prism User Guide

Nutanix AHV Administration Guide

In a scenario where a new AHV cluster is installed and the traffic is not being balanced across the physical NICs despite the ToR switches being configured with LACP, the appropriate network option to set within Prism Element is Active-Active. This configuration allows for a traffic-hashing algorithm, such as balance-TCP, to split traffic between multiple links in an active-active fashion.Since the uplinks appear as a single L2 link, the algorithm can balance the traffic among bond members without any regard for switch MAC address tables1.

Nutanix Community: AHV Networking | Enable, Disable and Verify LACP1

Nutanix Support & Insights: Layer 2 Network Management2

Nutanix Support & Insights: Enabling LAG and LACP on the ToR Switch (AHV Only)

by Vi at Jun 23, 2024, 11:35 AM

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Rory

5 months ago

Ah, the old 'LACP and unbalanced traffic' conundrum. Option D is the answer, my friends. MAC Pinning is the key to unlocking the balance.

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Sharika

3 months ago

Thanks for the tip, I'll make sure to set it to Active-Active with MAC Pinning.

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Dacia

3 months ago

I agree, MAC Pinning is the way to go for balancing traffic.

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Ozell

3 months ago

Option D) Active-Active with MAC Pinning is the solution.

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Zack

3 months ago

Thanks for the tip, I'll make sure to set it to Active-Active with MAC Pinning in Prism Element.

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Vivan

4 months ago

I agree, MAC Pinning will help balance the traffic across the physical NICs.

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Billye

4 months ago

Option D) Active-Active with MAC Pinning is the way to go.

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Elizabeth

5 months ago

I agree with Kara, D) Active-Active with MAC Pinning makes the most sense in this scenario.

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Truman

5 months ago

I'm not sure, but I think C) No Uplink Bond could also be a valid option.

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Kara

5 months ago

I disagree, I believe the correct answer is D) Active-Active with MAC Pinning.

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Tien

5 months ago

D is the way to go. Active-Active with MAC Pinning is the solution you need when LACP is in use. Easy peasy!

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Phil

4 months ago

No problem! It should help balance the traffic across the physical NICs in the AHV cluster.

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Carmen

4 months ago

Thanks for the tip! I'll make sure to set it to Active-Active with MAC Pinning in Prism Element.

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Jesusita

4 months ago

I agree, D is the way to go. It's the solution when LACP is in use.

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Farrah

4 months ago

I think D is the best option here. Active-Active with MAC Pinning should resolve the issue.

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Shaunna

6 months ago

I think the answer is B) Active-Active.

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Rosalind

6 months ago

Active-Active with MAC Pinning is the correct answer. I've dealt with this issue before, and that setting always does the trick.

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Ettie

6 months ago

I agree with Bettina. Active-Active with MAC Pinning is the way to go here. It's the only option that will properly balance the traffic across the NICs.

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