If you try to operate QFX5200 in a streaming telemetry only environment you might see that the support is missing for QOS in the QFX5200 device. On the other platforms it seems to be available.

On other supported platforms:

Native Junos:

  /junos/cos-forwarding-class-information/fc-map/fc-map-item/<fc-name>    

translates to

  /openconfig/qos/forwarding-groups/forwarding-group/<fc-name>/state

As per the Juniper document, QOS (openconfig-qos.yang) is not supported on QFX5200 device. The support for the same is not available yet.

https://www.juniper.net/documentation/us/en/software/junos/open-config/topics/concept/openconfig-data-model-version.html

However as a workaround, you can still use custom yang modules. 

https://www.juniper.net/documentation/us/en/software/junos/netconf/topics/topic-map/yang-modules-custom-implementing-cli-expansion.html

2024-05-22 - Initial Publication
​​​​​​​2024-07-29 - Visibility modified