Thanks. Remember 450Mbps is over 6 AP, so I don't think the RF utilization is an issue if we plan well (so AP will be in different 5GHz channels). We can't leave client above 15 to use multicast over the air, the quality will be very bad due to no re-transmission for multicast.
I just need to know if there any HW limitation for converting multicast to unicast for each controller model. We did find the old 6000 controller had very poor performance converting MC to UC. Even one stream will have very bad video quality. Then we change to a newer model, then it's much better. Then we hit this 150 clients 'limit'. I just want to know the limitation to avoid any waste of time keep trying.