Why is the IPVS media stream placed into the CBWFQ instead of priority queue?
A. An IPVS media stream can be placed into either a CBWFQ or priority queue, depending on how much priority queue traffic currently exists on the network. As a rule of thumb, no more than 33 percent of the bandwidth should be allocated to the strict priority queue. Both MPEG-4 and H.264 are more sensitive to loss than latency or jitter. Adequate service levels can be achieved via CBWFQ. The RFC 4594 (Configuration Guidelines for DiffServ Service Classes) allows the Broadcast Video class (which is used for IPVS) may be provisioned with a strict priority (EF) service; so LLQ is an option.
