Implementing QoS covers these categories: classification and marking of traffic, choosing a queuing method, conditioning traffic (shaping and policing), and efficiently using bandwidth. The following section deals with these categories, and examines how these components are implemented in a network.
Classification and Marking of QoS
Classification is the process of grouping traffic based on its QoS needs. Two methods are used to break up traffic into classes: access control lists (ACLs) and network-based application recognition (NBAR). Marking is then used to tag the packet and frame with the traffic group's classification value.
You typically want to classify and mark traffic as close to the source as possible. This means ...