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Question 292 - NCS-Core discussion

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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?

A.
Active-Backup
Answers
A.
Active-Backup
B.
Active-Active
Answers
B.
Active-Active
C.
No Uplink Bond
Answers
C.
No Uplink Bond
D.
Active-Active with MAC Pinning
Answers
D.
Active-Active with MAC Pinning
Suggested answer: B

Explanation:

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)

asked 23/09/2024
Tom Ogan
34 questions
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