How QoS Works

How QoS Works (Part 1 of 4)



How QoS Works (Part 1 of 4)
How QoS Works (Part 2 of 4) - Classification and Marking
How QoS Works (Part 3 of 4) - Queuing
How QoS Works (Part 4 of 4) - Shaping and Policing

This four part series covers the basic elements of QoS, providing visual, easy to understand examples. Topics covered in this series range from Classifications & Marking, Queuing, and Shaping & Policing.

 
Part 1: Introduction to QoS
Introductory tutorial video on QoS basics. This video covers topics such as classification, marking, queuing, policing, shaping and link fragmentation.
 
Part 2: Classification and Marking
QoS tutorial that covers the basics of classification and marking with an emphasis on Cisco switches and routers.  In this video you will learn about:
 
Part 3: Queuing
This video explains the different properties of Priority Queues and CBWFQ's and how the bandwidth can be allocated. Congestion avoidance mechanisms such as WRED and Class-Based Queue Settings are briefly described as well.
  • bulk/transactional traffic not as time, loss, or jitter sensitive
  • queue allocation (using LA), reserving bandwidth
  • congestion avoided mechanism WRED used to drop packets to throttle back tcp based apps
  • reduce congestion using class-based que settings
Part 4: Shaping and Policing
This video provides a visual demonstration of how shaping and policing works in the QoS process.