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Computer Networks

by: Furman Breitenberg

Computer Networks EEC 173A

Furman Breitenberg
GPA 3.93


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Class Notes
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This 2 page Class Notes was uploaded by Furman Breitenberg on Wednesday September 9, 2015. The Class Notes belongs to EEC 173A at University of California - Davis taught by Staff in Fall. Since its upload, it has received 51 views. For similar materials see /class/191948/eec-173a-university-of-california-davis in Engineering Electrical & Compu at University of California - Davis.

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Date Created: 09/09/15
Marc Greis Tutorial for the UCBLBNLVINT Network Simulator quotnsquot Page 1 of 2 III The Basics Brexismssectjon Nextsecliou Backmhejndex III1 DownloadingInstalling nsampnam You can build ns either from the the various packages TclTk otcl etc or you can download an 39all inone package I would recommend that you start with the allinone package especially if you re not entirely sure which packages are installed on your system and where exactly they are installed The disadvantage of the allin one distribution is the size since it contains some components that you don t need anymore after you compiled ns and nam It39s still good for rst tests and you can always switch to the single package distribution later Note The allin one package only works on Unix systems You can download the package from the ns mnhadpage at UCB If you have any problems with your installation take a look at the installation problems page on their server If that also doesn t solve your problem you might want to ask the After the installation is complete you should make sure that your path points to the 39nsallinonebin directory if you installed the ns allinone package where links to the ns and nam executables in the ns 239 and nam l directories can be found or if you built ns and nam from the pieces let your path point directly to the directories with the ns and nam executables On some systems you will also have to make sure that ns can nd the library libotclso If you installed the nsallinone package it should be in nsallinoneotcl On Solaris systems you would have to add this path to the LDiLIBRARYiPATH environment variable For help with other systems consult the insta a onmt empage the or your local Unix gurus A note concerning the nsallinone version 21b3 There is a bug in it which causes some problems on Solaris systems when nam trace generation is turned on You can either download nsallinone version 2th instead or go to the nwLelegeto download a current snapshot of ns If you do that you have to unzip and untar the le in your allinone directory Then you change into the new directory and run configure39 then make39 1112 Starting us You start ns with the command ns lttclscriptgt assuming that you are in the directory with the ns executable or that your path points to that directory where 39lttclscriptgt is the name of a Tcl script le which de nes the simulation scenario ie the topology and the events You could also just start ns without any arguments and enter the Tcl commands in the Tcl shell but that is de nitely less comfortable For information on how to write your own Tcl scripts for ns see section IV Everything else depends on the Tcl script The script might create some output on stdout it might write a trace le or it might start nam to visualize the simulation Or all of the above These possibilities will all be discussed in later sections http wwwisiedunsnamnstutorialnsbasichtml 11162003 Mare Grers Tutonal for the UCBLBN LV39INT Network Sxmulator us Page 2 of 2 1113 Starting ham You ear enher startnam wnh the command ham ltnamr legt where ltnamr legt 15 the name ofanam or 39T 1 Fr wmdow where the mostxmponant functions are bemg explamed Ammaum area mm m me Ilenlluns Repmrm farce m hymn mndzl Prevxoussecuon Nextsecuon Backto the 1ndex nsrusers nsru52r5 51211 httpWWW151edunsnamnstutonalnsbaslc html 11162003


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