Deploying QoS for Cisco IP and Next Generation Networks

Chapter 13

Performance Monitoring and Measurement

13.1 Overview

This chapter introduces measurement of network performance in the context of an overall service-level agreement (SLA) framework. Performance measurement is a necessary component of service assurance in a service provider operational function.

QoS implementation within a next-generation network (NGN) is a means of enforcing the basic SLA parameters of the following:

• Delay. Often also referred to as latency, delay is made up of three components: propagation, serialization, and queuing. Propagation delay is the time it takes for the physical signal to traverse the path. Serialization delay is the time it takes to actually transmit the packet. Queuing delay is the time a packet spends ...