qualnet tutorial

QualNet Tutorial

By- Punit Rathod

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Outline• What is QualNet?

• Tools in QualNet

• Directory Structure of QualNet

• How to use QualNet– Graphical Interface– Command Line

• Analysis using QualNet

• Demo

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Introduction• What is QualNet ?

– Commercial Derivative of GloMoSim– Java Based Graphical Interface– C based implementation for protocols– Event Based Simulator– Modular Design

• Support for various networks– MANET– QoS – Wired Networks– Cellular Networks– Satellite Networks

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Introduction• Advantages of QualNet

– Rapid Prototyping– Comparative performance of alternative

protocols at each layer– Built-in Measurements at each Layer– Modular– Scalable– A Graphical tool to allow rapid system and

protocol prototyping/modeling

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Layered Model• Architecture Similar

to the Physical Networks• 2. Well defined API for

the protocols to interact

with each other• Unit of Interaction:

“Message” can either

“Packet” or “Timer”

CBR / FTP / TELNET Application

TCP / UDP Transport

IP IP

OSPF / AODV Network

802.11 / 802.3 MAC

Bus / Point-2-Point Physical

Wired / Free Space

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Tools Provided by QualNet• Animator

– Graphical Experiment Setup and Animation

• Designer– Finite State Machine (FSM) based custom

protocol designer

• Analyzer– Statistical graphical analysis tool for custom

statistics

• Tracer– Packet Level Tracing and Visualization

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Installation• Prerequisites

– C compiler • Windows: Visual C++ 6.0 with SP5• Unix: gcc

– Java 1.3 or later– QualNet License

• Department QualNet License Server– prayog.it.iitb.ac.in– 30 user License– Can be accessed from 10.129.*.* subnet

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Directory Structure• The Basic Directory Hierarchy

• /bin Executable Files• /gui GUI• /main Basic Design and Makefiles• /docs Documentation• /data Modulation and Terrain data files• /verificationSample files and Output

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Directory Structure• Directories of use for modifications

• /addons Optional Packages• /phy Wireless Physical Layer & Propagation

Models• /mac MAC layer Protocols• /network Network layer and routing Protocols• /mobility Mobility Models• /transport Transport layer Protocols (TCP/UDP)

All flavors of TCP• /tcplib Trace based TCP applications

(FTP, TELNET, HTTP)• /application Application Layer Protocols & Traffic

Generators

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Using QualNet• 2 ways of using

– Graphical Interface• Using QualNet Animator

– Command line• Using text config files

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Graphical Method• Use QualNet Animator• Setup QualNet Parameters• Place Nodes and set up Applications• Create links• Change Application, node and link parameters• Animator Runtime Toolbar

– Start, Pause, Stop, Step through the simulation

• Choose simulation speed and animation detail• Choose among the dynamic statistics available

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Star Topology Example

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Star Topology Example

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Star Topology Example

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Star Topology Example

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Star Topology Example

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Star Topology Example

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Command Line Method• Create .config file using the template

default.config given in /bin folder

• Add nodes, applications and links in the config file

• Run Simulation using the command "qualnet <expt-name>.config"

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Input & Output files• Input Files

– Each file has name <expt-name>.extension– .config : General Simulation Parameters

configuration– .nodes : Nodes in the Network to be simulated– .app : Applications Configuration– .fault : Probabilistic Faults in a Node– .routes : Routing Entries

• Template for the configuration files available in /bin directory– Example configuration entry for FTP Flow– FTP <src> <dest> <# items> <size> <start_time>– FTP 1 2 10000 512 1.5S

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Input & Output files• Output Files

– .stat • Statistical Data (Summary)

– .trace• Packet Traces (can be read by QualNet Tracer)

– Specific Trace Dumps (TCP)• tcptrace.dmp• tcptrace.asc• tcptrace.out