2V0-21.23 Question 72
Select 3A virtualization administrator is configuring Network I/O Control (NIOC) on a vSphere Distributed Switch (vDS) to prioritize network traffic for critical workloads. The environment includes vMotion, management traffic, NFS storage, and virtual machine traffic. Which steps should the administrator take to ensure that NFS storage traffic always has the highest priority during periods of contention?
- A
Assign a dedicated uplink to NFS traffic within the vDS configuration.
- B
Set the NFS traffic reservation to a higher percentage within the NIOC resource allocation settings.
- C
Enable Network I/O Control version 3 on the vDS.
- D
Lower the shares for non-critical traffic types such as management traffic and vMotion.
- E
Create a custom traffic group for NFS storage and assign it the highest shares value.
Show answer and explanation
Correct answers: B, C, E
Explanation
Network I/O Control (NIOC) allows administrators to prioritize different types of network traffic on a vSphere Distributed Switch (vDS) during periods of contention. To ensure NFS storage traffic has the highest priority, the administrator must enable NIOC version 3, configure a custom traffic group with the highest shares for NFS storage, and adjust resource allocation settings, such as reservations, to guarantee minimum bandwidth. These steps work together to ensure critical traffic is prioritized when network resources are limited.
- A. Incorrect.
Assigning a dedicated uplink may improve performance but does not directly prioritize traffic during contention. This is unrelated to NIOC's share-based allocation mechanism.
- B. Correct.
Setting a higher reservation for NFS traffic ensures a minimum bandwidth allocation during contention, which is a key feature of NIOC.
- C. Correct.
Network I/O Control version 3 is required to configure resource allocation for specific traffic types and enable bandwidth management.
- D. Incorrect.
Lowering shares for non-critical traffic can help indirectly, but it is not sufficient on its own to guarantee NFS traffic always has the highest priority.
- E. Correct.
Creating a custom traffic group and assigning it the highest shares value ensures that NFS traffic receives the highest priority during network contention.