Overview of QoS in a Packet Switched Network

This course is included in our On-demand training solution.


Telecommunications engineers will need to ensure the quality of audio and video. Understanding the various QoS tools is helpful when determining implementation in the network. In this course, you will learn the various options for implementation of QoS on your network interfaces at layer 2 and layer 3.

Target Audience

Today’s IT Telecommunications Engineer working with the Cisco Unified Communications Manager must understand the basic foundation of the call agent. If you are interested in persuing CCNP collaboration, this course is necessary. Today there is a need for dedicated individuals focused on the Collaboration solution and Cisco recommends a Chief Collaboration Officer position for focus on voice and video technologies. Anyone interested in implementing or supporting the Cisco IP Telephony and Video solutions should also consider this course.



Expected Duration

90 min.

Course Objectives

Course Introduction

Issues in Packet-switching Networks

  • describe issues in packet-switching networks
  • Packet-switching Network Issue Solutions

  • describe solutions to packet-switching network issues
  • Bandwidth Calculations

  • describe bandwidth calculations
  • Layer 2 Overhead Bandwidth Calculations

  • describe bandwidth calculations for layer 2 overhead
  • Three Models of QoS

  • describe three models of QoS
  • DiffServ Terminology

  • describe diffServ terminology
  • Overview of QoS Components

  • describe QoS components
  • Classification

  • describe classification
  • Mapping Classes and Markings

  • describe mapping classes and markings
  • Congestion Management (Queuing)

  • describe congestion management (queuing)
  • Congestion Avoidance

  • describe congestion avoidance
  • Policing and Shaping

  • describe policing and shaping
  • Link Efficiency Methods: Compression

  • describe link efficiency methods: compression
  • Marking Methods

  • implement marking methods
  • Mapping Layer 2 CoS to Layer 3 QoS

  • implement mapping layer 2 CoS to layer 3 QoS
  • Marking Configuration Example

  • implement marking configuration
  • Comparison of Policing and Shaping

  • describe comparison of policing and shaping
  • Class-based Policing: Single/Dual Bucket

  • implement class-based policing: single bucket and dual bucket
  • Class-based Shaping

  • describe class-based shaping
  • Low Latency Queuing

  • describe low latency queuing
  • Monitoring LLQ

  • describe monitoring LLQ
  • Example 1: Single-rate Single Token Bucket

  • implement single-rate single token bucket class-based policing
  • Example 2: Single-rate Dual Token Buckets

  • implement single-rate dual token buckets class-based policing
  • Example 3: Class-based Shaping

  • implement class-based shaping
  • Exercise: Policing and Shaping