Configuring WebEx QoS Precedence Override

B.

In order to configure WebEx to adjust the precedence and override the QoS profile on the WLAN, the engineer needs to create an AVC (Application Visibility and Control) profile for WebEx. Option B is the correct answer.

AVC is a feature on Cisco wireless LAN controllers that allows administrators to identify and control applications running on the wireless network. By creating an AVC profile for WebEx, the engineer can customize the QoS settings for this application and ensure that it is prioritized over other network traffic.

Option A, changing the WLAN reserved bandwidth for WebEx, is not the correct answer because this would simply allocate a specific amount of bandwidth to WebEx, but it would not override the QoS profile on the WLAN.

Option C, creating an ACL (Access Control List) for WebEx, is also not the correct answer because ACLs are used for traffic filtering and do not affect QoS settings.

Option D, changing the AVC application WebEx-app-sharing to mark, is also not the correct answer because this would only mark the WebEx-app-sharing traffic, not the entire WebEx application.

To create an AVC profile for WebEx, the engineer would need to do the following:

1. Log in to the Cisco wireless LAN controller.
2. Go to the AVC profile configuration page.
3. Click "New" to create a new profile.
4. Name the profile "WebEx."
5. Select the WebEx application from the list of available applications.
6. Configure the QoS settings for the WebEx application to ensure that it is prioritized over other network traffic.
7. Save the profile and apply it to the appropriate WLAN.

Once the AVC profile is created and applied to the WLAN, WebEx traffic will be prioritized over other network traffic on the WLAN, ensuring that users have a better experience when using the WebEx application.