5. Classifiers

  1. Miguel Barreiros1 and
  2. Peter Lundqvist2

Published Online: 20 DEC 2010

DOI: 10.1002/9780470976814.ch5

QOS-Enabled Networks: Tools and Foundations

QOS-Enabled Networks: Tools and Foundations

How to Cite

Barreiros, M. and Lundqvist, P. (2011) Classifiers, in QOS-Enabled Networks: Tools and Foundations, John Wiley & Sons, Ltd, Chichester, UK. doi: 10.1002/9780470976814.ch5

Author Information

  1. 1

    Juniper Networks, Portugal

  2. 2

    Juniper Networks, Sweden

Publication History

  1. Published Online: 20 DEC 2010
  2. Published Print: 7 JAN 2011

ISBN Information

Print ISBN: 9780470686973

Online ISBN: 9780470976814



  • tools, classifiers - concept of Per-Hop Behavior (PHB) - each router in network implementing its own QOS settings;
  • classifier tool, assigning a class of service to each packet;
  • classification, operation implemented using - set of IF/THEN rules, in the form of “IF (match conditions), THEN (class of service assignment)”;
  • three specific realms, Ethernet, IP and MPLS - realm relating to level at which packet is processed by classifier;
  • packets' QOS markings – straightforward, and most popular ones;
  • classifier inspecting packet - targeting known location of QOS marking;
  • packet classification process, straightforward - classifier knowing, which packet to look for QOS markings;
  • classification and packets' QOS markings – popular, deployed classification process;
  • MPLS-TE capabilities of establishing LSPs - bandwidth reservations, end to end;
  • mixing different QOS realms - mix of technologies, between traffic flow end points


This chapter contains sections titled:

  • Packet QOS Markings

  • Inbound Interface Information

  • Deep Packet Inspection

  • Selecting Classifiers

  • The QOS Network Perspective

  • MPLS DiffServ-TE

  • Mixing Different QOS Realms

  • Conclusion

  • References