QoS on the switch

There are five key stages a packet passes through when traversing a switch: ingress, prioritization, destination determination, egress queuing, and transmission. The following table provides an overview of each stage, and lists the commands that can be used to configure QoS settings.

The following diagram shows how two different packets (one using CoS, and one using DSCP) might traverse a switch. It also shows how QoS configuration settings apply at each stage.