Today it was useful to confirm a switch was passing DSCP marked packets as expected and handling 'ef' marked packets. To do this on a cisco switch we can use the extended ping
The QoS fields used by the network device depend on the capabilities of the device and the QoS deployments of the network. Below is a little info about a few of these fields.
As part of studying the 642-642 QoS exam course is seems quite important to understand the relationship between the various ways of marking traffic. Below are some notes I've made so far about