We are in VoIP business and running RTP/SIP traffic 80% in our network we have other servers also like www and monitoring and operation, our network is very flat and simple also we have very basic configuration on
L3 switch and
L2 switches, we are running couple of VLANs to separate traffic and everything running without
Now we are thinking to implement
QoS because it's very important for real time protocols but have no idea how and what is the best practice to implement and do we really need QoS, there are many un-answered question i have and don't know how to start and where to start to implement QoS, so looking for expert advice or suggestion to see what we can do to make it better.