Quick start

Install

1. Download the latest version of modelling interface: download
2. Untar the downloaded archive in your working directory
3. Configure your bash environment. For that, in modintns-2 directory execute:
   ./confmi.sh

Model design

• routers and links,
• host and traffic sources with its access links,
• metrics to compute when the simulation is finished

The specific code for a simulation study is written in a main file as example (edu/0-prevj.rc) below:

#
# Copyright (c) 2007 University of La Reunion - France
# Author: Pascal ANELLI
# http://personnel.univ-reunion.fr/panelli
# All rights reserved.
#----------------------------------------------------
# Goal:
# TCP Before 88
# No congestion control in the end hosts
#---------------------------------------------------
#====================================================
# BEGIN of ressource attributes
#====================================================
# Simulation Model
#================
# default value
#--------------
Queue set limit_ 50

set opt(stoptime) 10

# Topology network
#-----------------

# number of core nodes
set opt(routelength) 2
set opt(corelink)   {{bw 0.7Mb} {tp 40ms} {queuesize 4} {queuetype DropTail}}

# Hosts
#-------
set opt(pattern) { \
                  {{hook {0 1}} \
                   {nbnode 1} \
                   {nbflow 1} \
                   {bw {{1Mb 1Mb}}} \
                   {tp 5ms} \
                   {type TCP} \
                   {sourceparam {{tcpversion TCP/RFC793edu} \
                                 {tcpsink TCPSink} \
                                 {agentparam { \
                                               {add793slowstart false}  \
                                               {add793additiveinc false} \
                                               {add793exponinc false} \
                                               {add793expbackoff false} \
                                               {window 12} \
                                               {packetSize 1250} \
                                             } \
                                 } \
                                }\
                   } \
                   {starttime 0}  \
                   {transfersize -1} \
                  } \
                 }

#  Post Process
#===============
# Analysis
#---------
# from pkt file   
set conf(pkt) { \
               {Flow  { \
			             { {*} {activity throughputT}} \
			            } \
		         } \
		        {Queue { } \
			    } \
	           }
# from param file                
set conf(param) { }

set conf(parameter) {{bottlebw 0.7Mb} {weight 1/16} {timeinterval 0.2} {wrap 100} }

# Plotting
#---------
# Instructions to merge curves of the same graph
set conf(plot) { }

#====================================================
# END of ressource attributes
#====================================================

Commands

SYNOPSIS
   ns test-suite.tcl [options] <ressources file name>
   
   <ressources file name> 
                  Description of the simulation model (.rc file)

OPTIONS
   -wd DIR
                  Output directory (default ./tmp).
   -stoptime NUM
                  Duration of simulation in seconds (simulated time).
   -nam 1
                  launch nam when the simulation is over.
   -namgraph 1
                  launch nam with session graph.
   -quiet 1
                  Display no graph.
   -verbose 1
                  print main instructions executed.

For example, to launch the simulation with the model described on this page called 0-prevj.rc:

ns test-suite.tcl -stoptime 20 -nam 1 edu/0-prevj.rc