2V0-21.23 Question 317
Single answerYou are configuring Network I/O Control (NIOC) on a vSphere Distributed Switch (vDS) to prioritize traffic for a critical storage application. The application requires guaranteed bandwidth, and you want to ensure that other less critical traffic types do not consume this reserved bandwidth during network contention. Which configuration step will best achieve this goal?
- A
Set a high share value for the storage traffic and leave all other traffic types at normal share values.
- B
Enable bandwidth reservation on the storage traffic and specify the required minimum bandwidth in Mbps.
- C
Increase the uplink MTU size to handle larger storage packets efficiently.
- D
Configure a dedicated physical NIC for storage traffic to isolate it from other traffic types.
Show answer and explanation
Correct answer: B
Explanation
Network I/O Control (NIOC) is designed to manage network bandwidth on a vSphere Distributed Switch by prioritizing and reserving bandwidth for critical traffic types. While shares control relative priority, they do not guarantee bandwidth during contention. Bandwidth reservation ensures that a minimum amount of bandwidth is always available for critical traffic, such as storage traffic, making it the best configuration to meet the application's requirements in this scenario.
- A. Incorrect.
Setting a high share value prioritizes storage traffic but does not guarantee a minimum bandwidth during contention. Shares only determine relative priority when bandwidth is over-subscribed.
- B. Correct.
Enabling bandwidth reservation for storage traffic and specifying the required bandwidth ensures that the traffic receives the minimum bandwidth it needs, even during congestion. This is the correct choice.
- C. Incorrect.
Increasing the uplink MTU size optimizes packet transmission but does not address bandwidth reservation or prioritization in NIOC.
- D. Incorrect.
Configuring a dedicated physical NIC isolates traffic but does not leverage NIOC's advanced bandwidth management capabilities, which are designed for shared networks.