Cisco CVOICE 8.0: QoS Mechanisms
The target audience for this course is established IT professionals with a solid, existing background in Cisco and networking technologies.
Please contact us for information about prerequisites.
IP networks must provide a number of services to adequately support voice transmission using VoIP. These services include security, predictability, measurability, and some level of delivery guarantee. Network administrators and architects achieve this service level by managing delay, delay variation (jitter), bandwidth provisioning, and packet loss parameters with quality of service (QoS) techniques. This course introduces the concept of a converged network, identifies four problems that could lead to poor quality of service, and describes solutions to those problems. It also explains and evaluates the three generic models of implementing QoS.
Differentiated services (DiffServ) is a multiple-service model for implementing quality of service (QoS) in the network. With DiffServ, the network tries to deliver a particular kind of service that is based on the QoS specified by each packet. This specification can occur in different ways, such as using the differentiated services code point (DSCP) in IP packets or source and destination addresses. The network uses the QoS specification of each packet to classify, shape, and police traffic and to perform intelligent queuing. This course focuses on the DiffServ model and explains the mechanisms that are used to implement DiffServ.
The Modular quality of service (QoS) command-line interface (CLI), or MQC, provides a modular approach to the configuration of QoS mechanisms. MQC allows network administrators to introduce new QoS mechanisms and reuse available classification options.
This course outlines how to implement QoS policies using MQC, and introduces the concepts of classification and marking. It explains the different markers that are available at the data-link and network layers, and identifies where classification and marking should be used in a network. The lesson also describes different approaches for improving the efficiency of WAN links.
Understanding QoS Mechanisms and Models
Classification, Marking, and Link Efficiency