2V0-21.23 Question 69
Select 2Your organization uses a vSphere Distributed Switch (VDS) to manage the network traffic for a large virtualized environment. You have been asked to configure and optimize Network I/O Control (NIOC) to ensure critical workloads receive sufficient bandwidth during periods of high network utilization. After enabling NIOC, which of the following steps should you take to properly allocate bandwidth for critical workloads?
- A
Define traffic types and assign them to predefined resource pools within NIOC.
- B
Configure bandwidth shares and limits for each traffic type on the VDS.
- C
Enable NIOC on each individual ESXi host managed by the VDS.
- D
Monitor traffic usage using vRealize Network Insight to adjust NIOC settings dynamically.
- E
Ensure the physical NICs (uplinks) on the VDS are configured with sufficient bandwidth to handle traffic peaks.
Show answer and explanation
Correct answers: B, E
Explanation
Network I/O Control (NIOC) on a vSphere Distributed Switch (VDS) is used to prioritize network traffic by allocating bandwidth shares and limits to specific traffic types. After enabling NIOC, you must configure these shares and limits to ensure critical workloads are prioritized during periods of contention. Additionally, the physical network must provide sufficient uplink bandwidth for NIOC to operate effectively. Steps such as enabling NIOC on individual hosts or relying solely on monitoring tools are incorrect and do not directly configure or optimize NIOC functionality.
- A. Incorrect.
Incorrect: NIOC allows you to configure traffic types, but you do not assign them to predefined resource pools. Instead, you configure bandwidth shares and limits to control traffic prioritization.
- B. Correct.
Correct: Configuring bandwidth shares and limits for each traffic type is a crucial step in managing NIOC to ensure that critical workloads have sufficient bandwidth during high utilization.
- C. Incorrect.
Incorrect: NIOC is enabled at the VDS level, not on individual ESXi hosts. Once enabled on the VDS, all hosts connected to it inherit the NIOC settings.
- D. Incorrect.
Incorrect: While monitoring traffic usage is a good practice, it is not a direct configuration step for NIOC. vRealize Network Insight is more suitable for long-term analysis and optimization rather than initial configuration.
- E. Correct.
Correct: Ensuring physical NICs (uplinks) have adequate bandwidth is essential for NIOC to function effectively. Without sufficient uplink capacity, NIOC cannot guarantee bandwidth allocation during congestion.