WiredandwirelessexampleTSPRADEEPKUMAR

VITUniversity–ChennaiCampushttp://www.pradeepkumar.orgtspembedded@gmail.com

www.facebook.com/tspradeep

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WiredExample

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WiredExample….• Thisnetworkconsistsof4nodes(n0,n1,n2,n3)asshowninabovefigure.

• Theduplexlinksbetweenn0andn2,andn1andn2have2Mbpsofbandwidthand10msofdelay.

• Theduplexlinkbetweenn2andn3has1.7Mbpsofbandwidthand20msofdelay.

• EachnodeusesaDropTailqueue,ofwhichthemaximumsizeis10.

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WiredExample….#Createasimulatorobjectsetns[newSimulator]

#OpentheNAMtracefilesetnf[openout.namw]$nsnamtrace-all$nf

#colorfordataflow$nscolor1red$nscolor2blue

#Createfournodessetn0[$nsnode]setn1[$nsnode]setn2[$nsnode]setn3[$nsnode]

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WiredExample….#Definea'finish'procedureprocfinish{}{globalnsnf$nsflush-trace#ClosetheNAMtracefileclose$nf#ExecuteNAMonthetracefileexecnamout.nam&exit0}

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WiredExample….#Createlinksbetweenthenodes$nsduplex-link$n0$n22Mb10msDropTail$nsduplex-link$n1$n22Mb10msDropTail$nsduplex-link$n2$n31.7Mb20msDropTail

#SetQueueSizeoflink(n2-n3)to10$nsqueue-limit$n2$n310

#Givenodeposition(forNAM)$nsduplex-link-op$n0$n2orientright-down$nsduplex-link-op$n1$n2orientright-up$nsduplex-link-op$n2$n3orientright

#Monitorthequeueforlink(n2-n3).(forNAM)$nsduplex-link-op$n2$n3queuePos0.5

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WiredExample….#SetupaTCPconnectionsettcp[newAgent/TCP]$tcpsetclass_2$nsattach-agent$n0$tcpsetsink[newAgent/TCPSink]$nsattach-agent$n3$sink$nsconnect$tcp$sink$tcpsetfid_1

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WiredExample….#SetupaFTPoverTCPconnectionsetftp[newApplication/FTP]$ftpattach-agent$tcp$ftpsettype_FTP

#SetupaUDPconnectionsetudp[newAgent/UDP]$nsattach-agent$n1$udpsetnull[newAgent/Null]$nsattach-agent$n3$null$nsconnect$udp$null$udpsetfid_2 �8

WiredExample….#SetupaCBRoverUDPconnectionsetcbr[newApplication/Traffic/CBR]$cbrattach-agent$udp$cbrsettype_CBR$cbrsetpacket_size_1000$cbrsetrate_1mb$cbrsetrandom_false

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WiredExample….#ScheduleeventsfortheCBRandFTPagents$nsat0.1"$cbrstart"$nsat1.0"$ftpstart"$nsat4.0"$ftpstop"$nsat4.5"$cbrstop"

#Detachtcpandsinkagents(notreallynecessary)$nsat4.5"$nsdetach-agent$n0$tcp;$nsdetach-agent$n3$sink"

#Callthefinishprocedureafter5secondsofsimulationtime$nsat5.0"finish"

#PrintCBRpacketsizeandintervalputs"CBRpacketsize=[$cbrsetpacket_size_]"puts"CBRinterval=[$cbrsetinterval_]"

#Runthesimulation$nsrun

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Output

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