QoS - applying policies

When configuring QoS, simply classifying and marking might not enable any QoS mechanisms. Some QoS policy must be applied to the marked traffic. Whether this is true depends on the platform you use.

Such policies can come in the form of various mechanisms including shaping, policing, and various forms of queuing. You can read more about when QoS activates or is trigger here: QoS Mechanism Triggers.

Links

https://networklessons.com/quality-of-service/qos-llq-low-latency-queueing-cisco-ios https://networklessons.com/quality-of-service/apply-cbwfq-to-sub-interface https://networklessons.com/quality-of-service/how-to-configure-queuing-on-cisco-catalyst-3560-and-3750-switch https://networklessons.com/quality-of-service/qos-traffic-shaping-explained https://networklessons.com/quality-of-service/qos-traffic-policing-explained