300-425 Question 51
Select 3A company is deploying a high-density wireless network to support voice and video applications. The network engineer is tasked with implementing Quality of Service (QoS) to prioritize these applications for wireless clients. Which of the following steps are required to properly configure QoS on the wireless LAN controller (WLC)?
- A
Enable Wi-Fi Multimedia (WMM) on the SSID profile.
- B
Configure QoS profiles to map DSCP values to wireless traffic classes.
- C
Disable the AVC (Application Visibility and Control) feature to avoid interference with QoS settings.
- D
Set the SSID QoS policy to Platinum for voice and video prioritization.
- E
Ensure that access points are configured for Local mode, as FlexConnect does not support QoS.
Show answer and explanation
Correct answers: A, B, D
Explanation
To implement QoS for wireless clients, it is essential to enable WMM, configure QoS profiles for proper traffic classification, and set appropriate SSID QoS policies to prioritize critical traffic types like voice and video. Disabling AVC or requiring Local mode is not necessary, as these do not directly impact the implementation of QoS.
- A. Correct.
Enabling Wi-Fi Multimedia (WMM) on the SSID profile is a foundational step for QoS in wireless networks, as it allows prioritization of traffic classes such as voice and video.
- B. Correct.
Configuring QoS profiles to map DSCP values to wireless traffic classes ensures that traffic is appropriately tagged and prioritized throughout the network.
- C. Incorrect.
Disabling AVC is not required for QoS implementation. In fact, AVC can complement QoS by identifying and classifying traffic types.
- D. Correct.
Setting the SSID QoS policy to Platinum ensures that voice and video traffic are given the highest priority within the wireless network.
- E. Incorrect.
FlexConnect mode does support QoS, but it has some limitations compared to Local mode. However, this does not mean that access points must always operate in Local mode for QoS to be implemented.