Classifiers: A Multi-Target Packet Forwarder

Note: This is a detailed note for the book, Introduction to Network Simulator NS2. You may have to read chapter 6 of the book for better understanding.

Introduction
This post is a sequel of the previous post, which demonstrated the relationship of classifiers, routing modules, and nodes:

• What are they, their purposes, their relationship,
• How to configure them conceptually, and
• Using $ns node, how a default classifier, namely “classifier_”, is created and put in a node.
• Putting a routing modules rtnotif_ and ptnotif_ in a node using "$ns node"

What’s in This Post
I feel that before we can proceed further we need an understanding of what classifier is. Basically, it is an object which connects one NsObjects to several NsObjects. Note, in NS2 terminology, every object which can send and receive packets is called an NsObject.
I made up a presentation file which explains the concept of classifiers: What it is What's its purpose, How it works, How to configure it. Enjoy...

NS2 Classifiers


View more presentations from Teerawat Issariyakul.
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For more information about classifiers and routing module, see Chapter 6 in the following book from Springer:
T. Issaraiyakul and E. Hossain, “Introduction to Network Simulator NS2”, Springer 2009.


You may also find lecture notes and other resource at the following website: http://www.ece.ubc.ca/~teerawat/NS2.htm