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Question 56

During a vSAN design workshop, the infrastructure team highlighted the need to ensure the availability and resiliency of the vSAN network for their production clusters. Each ESXi host is connected to the TOR switches with two 1 GB physical adapters. The physical network fabric is using a spine-leaf architecture.

These subnets are available for the ESXi hosts:

• Subnet A: 192.168.10.0/24

• Subnet B: 192.168.20.0/24

Which three strategies can the architect suggest to satisfy these customer requirements? (Choose three.)

    Correct Answer: A, B, D

    To ensure availability and resiliency of the vSAN network for production clusters, the following strategies are recommended: Configuring MTU 9K jumbo frames on the hosts and leaf switches to reduce CPU utilization and improve throughput; configuring NIC teaming to provide redundancy and load balancing; and adding one vSAN VMKernel port to subnet B to ensure network segmentation and resilience. Changing the physical adapters to 10 GB is not necessary for network availability and could introduce unnecessary cost if not required; hence, it's better to utilize configuration strategies within existing hardware capabilities.

Discussion
fm313Options: ACD

My Answer is ACD A: VMware testing finds that using jumbo frames can reduce CPU utilization and improve throughput C: We need minimum 10GB for vSAN D: vSAN network traffic uses a single VMkernel port for most configurations. We can assume subnet A is for MGMT and vSAN should be on a different subnet

kensivertsenOptions: ABC

How can u manage using only one x vSAN VMkernel to one of the subnets? Why not both? Therefore option D-E-F is listen only to confuse, at least me

AnjanarajOptions: ABC

My answer ABC https://core.vmware.com/resource/vmware-vsan-design-guide#sec6822-sub6

kernelkraut

I agree. ABC. You only create one vSAN VMkernel port but you attach multiple NIC's for redundancy to that vSwitch or vDS. So that throws out D,E and F. 9K MTU is recommended and in the documentation, so is nic teaming. The only thing this question doesn't speak about is whether they are using all flash or hybrid. OSA supports 1Gb if you are not using all flash....