NS-2 Training
12/08/2014
Introduction
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NS-2: Network Simulator Generation 2
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Latest Release: 2.35 / Nov. 4, 2011
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http://sourceforge.net/projects/nsnam/files/allinone/ns-allinone-2.35/
Other Simulators
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OPNET
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QualNet
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ns-3
Installation (1/2)
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Cygwin
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Linux-like environment for Windows
Download
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
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http://140.116.72.80/~smallko/ns2/cygwin.rar
http://www.cygwin.com/
NS-2
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
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The latest version: ns-2.35
ns-allinone-2.28/2.29
Download
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
http://sourceforge.net/projects/nsnam/files/allinone/
http://140.116.72.80/~smallko/ns2/ns-allinone-2.28.rar
Installation (2/2)
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Nam: Network Animator (nam-1.15 released Nov 4 2011)
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
animation tool for viewing network simulation traces and real
world packet traces
http://www.isi.edu/nsnam/nam/index.html
TCL Codes
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TCL (Tool Command Language)
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pronounced as "tickle"
Basic terms
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Create a new simulator
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Definitions for nam
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Open a trace file
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Network behaviors
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• Initialize the packet format
• Create a scheduler
• Select the default address format
• /ns-2.xx/tcl/lib/ns-lib.tcl
set ns [new Simulator]
set nf [open out.nam w]
$ns namtrace-all $nf
set nd [open out.tr w]
$ns trace-all $nd
Nodes, links, queue size, node position, traffic types, simulation times,
etc.
Example
Output data
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
NAM
Trace
• appeared as "------" since no flag is set
• Explicit Congestion Notification
Analysis
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AWK
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Alfred Aho, Peter Weinberger, and Brian Kernighan
programming language that is designed for processing textbased data
pronounced as the same as the name of the bird, “auk”
Run AWK file
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Commands
awk -f file1.awk file2.tr
awk -f file1.awk file2.tr > out.txt
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file1.awk
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file2.tr
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a command file
a primary input file
out.txt
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an output file
AWK
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Form
/pattern/ { action }
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Pattern is typically an expression
Action is a series of commands
In NS-2 Simulator
BEGIN { action }
END { action }
AWK
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You can measure
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Delay, Jitter, Packet loss, and Throughput
Example
NSG2
NSG2
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NSG2
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
http://sites.google.com/site/pengjungwu/nsg
JAVA6.0
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http://java.sun.com/
Creative Intelligence Information System Lab,
Department of Computer Science and Engineering,
National Sun Yat-sen University
Resources
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Gunplot
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Plot the analyzed results of awk
Web site
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NS2 使用說明手冊
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NS-2 Trace Formats
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http://hpds.ee.ncku.edu.tw/~smallko/ns2/ns2.htm
http://nsnam.isi.edu/nsnam/index.php/NS-2_Trace_Formats
Books
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計算機網路實驗—以NS2模擬工具實作，柯志亨
計算機網路實驗—使用NS2模擬多媒體通訊與無線網路，
柯志亨團隊