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NS2. Keywords: Install Network Simulator 2.26 Unix/Linux and Windows Network Animator 1.9 Xgraph/Tracegraph Object/Tool Command Language By Abu Asaduzzaman aasaduzz@cse.fau.edu. Agenda. Introduction Mobile Computing Simulations Installation (ns2, nam1, xgraph)

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slide1

NS2

Keywords:

Install Network Simulator 2.26

Unix/Linux and Windows

Network Animator 1.9

Xgraph/Tracegraph

Object/Tool Command Language

By

Abu Asaduzzaman

aasaduzz@cse.fau.edu

MCLab CSE Dept, FAU

agenda
Agenda
  • Introduction
  • Mobile Computing Simulations
  • Installation (ns2, nam1, xgraph)
  • Installation Problems and Bug Fixes
  • Bug Reports
  • Demo/Example (Otcl)

MCLab CSE Dept, FAU

introduction
Introduction
  • What/why NS2?
    • Discrete event, packet level simulator
      • Open source, supports research
      • Protocol design, traffic study
    • Written in C++ with Otcl front-end
    • Wired and Mobile modes
    • Link layer and up for most wired
    • Additional lower layers for wireless

MCLab CSE Dept, FAU

introduction1
Introduction (+)
  • What is discrete event simulation?
    • list of events ordered by simulation time
    • take next event, run it until done
    • each event happens in an instant of virtual /simulated time, but takes an arbitrary amount of real time
  • Why Otcl and C++?
    • Detailed simulation (runtime speed) – C++
    • Varying parameters (change model) – Tcl

MCLab CSE Dept, FAU

portrait of a mobile node

Routing/Agent

Protocol/Agent

Portrait of a Mobile Node

n1

Port Classifier

Addr Classifier

entry

Link Layer

Interface queue

MCLab CSE Dept, FAU

introduction2
Introduction (+)
  • Any other simulation tools?
    • OPNET Modeler
      • Run faster, commercial usages
      • Text based, no nice graphics

MCLab CSE Dept, FAU

introduction3
Introduction (+)
  • What about NAM?
    • NAM provides a visual view of the simulation
      • view overall topology - nodes and links
      • packets in transmission, queued, and dropped
      • can monitor individual nodes, links, or packets
      • provides graphical results with xgraph in Unix only

MCLab CSE Dept, FAU

introduction4
Introduction (+)
  • What is Xgraph/Tracegraph?
    • Xgraph for Unix/Linux only
    • Tracegraph for Unix/Windows both
    • plot graphical results
    • number of packets transmitted over time, end-to-end delay, etc

MCLab CSE Dept, FAU

introduction5
Introduction (+)
  • Available?
    • Installed in CSE Lab S&E-319 and MCLab S&E-409
    • Install in Unix/Linux or Windows OS
    • http://www.isi.edu/nsnam/ns/
    • http://www.isi.edu/nsnam/nam/
    • http://www.cv.nrao.edu/adass/abstracts/bof_tcl.html

MCLab CSE Dept, FAU

introduction6
Introduction (+)
  • How much memory it takes?
    • Approximately 70 MB of space for precompiled NS2 binary, or
    • 145 + 50 MB of space for full NS2 and NAM1 source

MCLab CSE Dept, FAU

introduction7
Introduction (+)
  • Simulate mobility using NS2?
    • Various modules were added to NS2 to simulate node mobility and wireless networking
      • Mobile Node
      • Ad-hoc Routing (DSR, DSDV, TORA, AODV)
      • MAC802.11
      • Radio Propagation Model
      • Channel

MCLab CSE Dept, FAU

summary
Summary

NS2 supports graphical representations,

that helps to visualize how protocols

work and interact with different network

topologies.

MCLab CSE Dept, FAU

download and build ns2
Download and Build NS2
  • Before you start …
    • Memory
    • A C++ compiler
    • Unix or Windows
    • X server (Cygwin/XFree86 for Windows)
      • Cygwin - Linux-like environment for Windows
        • cygwin1.dll - acts as a Linux emulation layer
        • Tools - provide Linux look and feel
      • Cygwin/XFree86 - X Server, Xlib, and X clients (xterm)

MCLab CSE Dept, FAU

download and build ns21
Download and Build NS2 (+)
  • NS2 Packages
    • Current Release - ns-2.26
    • All-in-one or All-at-once (about 250 MB)
      • http://www.isi.edu/nsnam/ns/ns-build.html#allinone
    • Get-the-pieces
      • http://www.isi.edu/nsnam/ns/ns-build.html#pieces
      • HTTP http://www.isi.edu/nsnam/dist/
      • FTP ftp://ftp.isi.edu/nsnam/
      • CVS http://www.isi.edu/nsnam/ns/ns-anoncvs.html

MCLab CSE Dept, FAU

download and build ns22
Download and Build NS2 (+)
  • Get-the-pieces
    • Tcl/Tk (Tool Command Language/Tool Kit)
    • otcl (object-oriented Tcl)
    • TclCL (or ibTcl) (Tcl/C++ interface)
    • NS-2
    • Nam-1
    • Awk (Aho, Weinberger, Kernighan), or
    • Perl (Practical Extraction and Report Language)
    • xgraph - an animation plotting program

MCLab CSE Dept, FAU

ns2 v2 26 for windows
NS2(v2.26) for Windows
  • Nicolas Christin
    • e-mail: nicolas@cs.virginia.edu
    • University of Virginia - Dept. of Computer Science
    • Last updated on 02/03/2003 or later
  • Building NS2 on Cygwin [versions 2.1b9a and 2.26] for Microsoft Windows
    • http://csl.ee.iastate.edu/~cpre543/ns2/ns2_howToInstall.htm

MCLab CSE Dept, FAU

what you need
(+) What you need
  • cygwin-1.3.12 or later with UNIX text type
  • XFree86 binaries, sources and configuration files
    • the XFree86-base, XFree86-bin, XFree86-prog, XFree86-lib, and XFree86-etc packages.
  • The make and patch utilities
  • Also, diff, tar, gzip, w32api package
  • For ns-allinone-2.26
    • http://www.isi.edu/nsnam/dist/ns-allinone-2.26.tar.gz
  • nam-1.9.configure
    • http://www.sims.berkeley.edu/~christin/software/nam-1.9.configure

MCLab CSE Dept, FAU

how long does it take
(+) How long does it take
  • A full (Cygwin, XFree86, ns2) install+validation on a 1.6GHz P-4 with WindowsME
    • takes approx 3.5 hours
  • Only ns2 allinone (not Cygwin, XFree86) install+validation on a 2.0GHz P-4 with WindowsXP
    • takes (0.25+1) hours

MCLab CSE Dept, FAU

how to install ns2
(+) How to install NS2
  • ns-allinone-2.26.tar.gz file in Cygwin home directory
  • nam-1.9.configure file in Cygwin home directory
  • Launch Cygwin, start an XFree86 server (using startx)
  • From your Cygwin (bash) prompt run:
    • gzip -d -c ns-allinone-2.26.tar.gz | tar xvf -
    • mv nam-1.9.configure ns-allinone-2.26/nam-1.9/configure
  • Now install everything by doing:
    • cd ns-allinone-2.26
    • ./install

MCLab CSE Dept, FAU

update env variables bashrc
(+) Update env variables (~/.bashrc)
  • export NS_HOME=/home/XXX/ns-allinone-2.26/
  • export PATH=$NS_HOME/tcl8.3.2/unix
  • :$NS_HOME/tk8.3.2/unix:$NS_HOME/bin:$PATH
  • export LD_LIBRARY_PATH=$NS_HOME/tcl8.3.2/unix
  • :$NS_HOME/tk8.3.2/unix
  • :\$NS_HOME/otcl-1.0a8:$NS_HOME/lib
  • :$LD_LIBRARY_PATH
  • export TCL_LIBRARY=$NS_HOME/tcl8.3.2/library

MCLab CSE Dept, FAU

building ns2 v2 26 for windows
Building NS2(v2.26) for Windows (+)
  • Run the validation tests
  • cd ns-2.26
  • ./validate
    • /home/XXX/ns-allinone-2.26/ns-2.26/validate
  • Done!

MCLab CSE Dept, FAU

building ns2 on unix linux
Building NS2 on UNIX/Linux
  • Linux Style: Network Simulator 2: a Simulation Tool for Linux
    • Posted on Monday, October 21, 2002 by Ibrahim F. Haddad and David Gordon
    • http://www.linuxjournal.com/article.php?sid=5929

MCLab CSE Dept, FAU

ns2 allinone package
(+) ns2 allinone package
  • Download all-in-one package from the NS2 home page
    • http://www.isi.edu/nsnam/ns/
    • into /usr/src
  • Extract it as follows,
    • cd /usr/src
    • tar xzvf ns-allinone-2.1b8.tar.gz
    • cd ns-allinone-2.1b8

MCLab CSE Dept, FAU

sctp patch
(+) SCTP patch
  • Get and apply the SCTP patch to NS2
    • patch -p0 < ns-allinone-2.1b8.sctp-rel2.2_patch_orig
  • ./install
    • /usr/src/ns-allinone-2.1b8/install

MCLab CSE Dept, FAU

update env variables etc profile
(+) Update env variables (/etc/profile)
  • Export PATH=$CUR_PATH/bin
  • :$CUR_PATH/tcl$TCLVER/unix
  • :$CUR_PATH/tk$TKVER/unix
    • you'll be able to run itm/tclsh/wish/xgraph.
  • Update /etc/profile
    • "source /etc/profile"
  • Done!

MCLab CSE Dept, FAU

building ns2 on linux
Building NS2 on Linux (+)
  • To run the validation suite:
  • cd ./ns-2.1b8
  • ./validate
    • /usr/src/ns-allinone-2.1b8/ns-2.1b8/validate

MCLab CSE Dept, FAU

problems and bug fixes
Problems and Bug Fixes
  • General Problems
    • I can't download ns from this web site
    • command not found
    • "apply a patch file“ – ftp.gnu.org
    • Validation under Windows does not work
    • NS (or otcl or tclcl) gets link errors
      • manually add the dll to ns's Makefile
    • set DISPLAY to machine:0.0 (setenv/export)

MCLab CSE Dept, FAU

problems bug fixes
(+)Problems & Bug Fixes
  • Other Problems
      • NS 2.26 - all-in-one/Get-by-pieces
        • an old file crept its way into the release
      • Nam - "configure" script has a typo
        • edit nam-1.9/configure, ZLIB_VERS=1.1.4 (not 3)
      • xGraph
        • cannot open display - set DISPLAY
      • Tclcl/Otcl
        • Make sure header files are not missing
      • Lunix Systems
        • Intel Linux doesn't use IEEE arithmetic

MCLab CSE Dept, FAU

validation tests
Validation Tests
  • Validation Test in Windows
    • cd ns-2.26
    • ./validate
      • /home/XXX/ns-allinone-2.26/ns-2.26/validate
  • Validation Test in Linux
    • cd ./ns-2.1b8
    • ./validate
      • /usr/src/ns-allinone-2.1b8/ns-2.1b8/validate

MCLab CSE Dept, FAU

bug reports
Bug Reports
  • Report goes to the ns-users-list and ns-developers
  • http://www.isi.edu/cgi-bin/nsnam/reportbug.cgi
  • Contact Information (name, e-mail)
  • Environment (Pkg, Pkg-Ver#, OS, env)
  • Description (Category, Sub, Desc)

MCLab CSE Dept, FAU

ns communication model
NS Communication Model
  • Nodes
    • Hosts, Routers

2

1

  • Links
    • Queue Management
    • Queue Monitoring

3

UDP

  • Agents
    • Protocol

5

4

UDP Sink

MCLab CSE Dept, FAU

slide32
Node

Unicast Node

n0

Port Classifier

Addr Classifier

Node entry

Link 1

Link 2

MCLab CSE Dept, FAU

slide33

n0

n1

duplex link

Link

Link n0-to-n1

Head

Tail

enqH

queue

deqT

n1 entry

Node entry

MCLab CSE Dept, FAU

queue
Queue

The Drop-Tail Queue,

- implements FIFO scheduling

- drop-on-overflow

- typical buffer management of most present-day Internet routers

MCLab CSE Dept, FAU

routing

n0

n1

Port Classifier

Addr Classifier

0

Node entry

1

Routing

MCLab CSE Dept, FAU

routing1

n0

n1

Port Classifier

Addr Classifier

1

0

0

1

entry

Link n1-n0

Routing

Port Classifier

Addr Classifier

entry

Link n0-n1

MCLab CSE Dept, FAU

transport

Agent/UDP

Agent/UDPSink

0

0

0

1

1

0

Transport

n0

n1

Port Classifier

Port Classifier

dst_= 1.0

Addr Classifier

Addr Classifier

entry

Link n0-n1

entry

Link n1-n0

MCLab CSE Dept, FAU

application

App/Traffic/CBR

dst_=1.0

0

1

1

0

Application

n0

n1

Port Classifier

Port Classifier

Agent/UDPSink

Addr Classifier

Addr Classifier

Agent/UDP

0

0

entry

Link n0-n1

entry

Link n1-n0

MCLab CSE Dept, FAU

packet flow

dst_=1.0

0

1

1

0

Packet Flow

n0

n1

App/Traffic/CBR

Port Classifier

Port Classifier

Addr Classifier

Addr Classifier

Agent/UDP

0

0

Agent/UDPSink

entry

Link n0-n1

entry

Link n1-n0

MCLab CSE Dept, FAU

things to remember
Things to Remember
  • Topology (nodes), agents, Applications
  • Connect the agents
  • Start/Stop the sources
  • Declare global variables before use
  • “$ns run” – last line

MCLab CSE Dept, FAU

conclusion
Conclusion
  • Installed NS2 in UNIX/Linux and Windows
  • Ran Simulation for both wired and wireless networks in NS2
  • Very promising simulation tool for both wired and wireless(local and satellite) networks

MCLab CSE Dept, FAU

demo example
Demo/Example
  • The example Tcl/Otcl script is for NS which simulates a simple network topology
  • This script shows how to
    • Create and set up nodes and links
    • send data from one node to another
    • monitor a queue
    • start Nam from the simulation script to visualize

MCLab CSE Dept, FAU

demo example1
Demo/Example

Continue on Elmo projector…

Questions?

Abu Asaduzzaman

aasaduzz@cse.fau.edu

Thank You.

MCLab CSE Dept, FAU