According to the Easy QoS design guide the CUCM tells the APIC-EM when a call is being established.
Dynamic QoS flows are initiated when call signaling systems, such as CUCM, use the northbound REST-based API to signal to APIC-EM that a call has been established
But what about other applications. Was thinking using the API to setup dynamic QoS for non Cisco stuff like Citrix.
The API are documented. Swagger has them in /policy/flow
Had also put them into DevNet deep dive presentation (slide 71)
There are some current limitations:
1) Dynamic QoS only works on wired today (wireless is coming)
2) There are only two traffic classes you can mark, voice and video