A 7-Mb multicast traffic stream is being sent to wireless clients and it is using up most of the available wireless spectrum in the 2.4-GHz unlicensed band.
As a result, many of the data applications have become sluggish and the video is choppy.
What is the best option to send the multicast over the wireless network more efficiently and leave some bandwidth for the data applications (assuming the network is capable of supporting this option)?
The best option to send the multicast over the wireless network more efficiently and leave some bandwidth for the data applications is to enable WMM (Wi-Fi Multimedia) QoS (Quality of Service).
WMM QoS is a mechanism used to prioritize different types of traffic on a wireless network. It ensures that time-sensitive traffic, such as voice and video, is given priority over less time-sensitive traffic, such as data. WMM QoS accomplishes this by using four access categories (ACs) that define different levels of priority for traffic. The four ACs are voice, video, best effort, and background.
By enabling WMM QoS, the network can prioritize the multicast traffic stream, ensuring that it is transmitted more efficiently over the wireless network, and leaving some bandwidth for the data applications. This will help to prevent the data applications from becoming sluggish and the video from being choppy.
The other options presented in the question are not as effective as enabling WMM QoS. Raising the DTIM to 10 may reduce the amount of multicast traffic sent to the clients, but it will not prioritize the multicast traffic over the data traffic, and it may result in delayed delivery of multicast traffic. Turning on multicast-multicast mode will not improve the efficiency of multicast traffic over the wireless network. Turning off the lower data rates may reduce the amount of multicast traffic sent to the clients, but it will also reduce the overall range and coverage of the wireless network.