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End-to-End QoS Network Design by Christina Hattingh, Tim Szigeti - CCIE No. 9794

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Chapter 3. Classification and Marking Tools

This chapter includes the following topics:

  • Classification and marking

  • Discussion of Layer 2 and Layer 3 marking fields and how these translate to each other

  • Packet marking in different technologies, such as IP, MPLS, ATM, Frame Relay, and Ethernet

  • Class-based classification and marking techniques and other mechanisms to achieve these results

The first step in defining a Quality-of-Service (QoS) policy is to identify the traffic that is to be treated differently (either preferentially or differentially). This is accomplished through classification and marking.

Although the terms classification and marking often are used interchangeably, the terms represent distinct and different actions that work together ...

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