TCP_UDP.rar_UDPns2_ns2_ns2UDP_ns2tcp资源-CSDN文库

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TCP_UDP模拟实验.pdf 514KB

NS2 TCP UDP

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NS2

3-2

NS2 (TCL script)

# "#" , NS2

set ns [new Simulator]

proc finish {} {

exit 0

}

# finish , , 5

$ns at 5.0 "finish"

$ns run

(awk gnuplot)

(End-to-End Delay) (Jitter) (Packet Loss)

(Throughput) (traffic

trace file)

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3-3

TCP UDP

s1 s2 r d

s1 r s2 r 2Mbps 10ms

r d 1.7Mbps 20ms

DropTail r d (queue

limit) 10 s1 d FTP FTP

TCP TCP

s1 TCP agent tcp TCP

d TCPsink agent sink TCP (ACK)

TCP agent

(connect)

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NS2

3-4

TCP 1 Kbytes

NS2 ~\ns-allinone-2.27\ns-2.27\tcl\lib ns-

default.tcl s2 d (Constant Bit

Rate CBR) CBR UDP s2 UDP agent

udp UDP d Null agent sink

s2 UDP CBR

1Mbps 1Kbytes CBR 0.1 4.5

FTP 1.0 4.0

TCL ( Exp3\exp3.tcl)

set ns [new Simulator]

# NAM

$ns color 1 Blue

$ns color 2 Red

# NAM

set nf [open out.nam w]

$ns namtrace-all $nf

set nd [open out.tr w]

$ns trace-all $nd

proc finish {} {

global ns nf nd

$ns flush-trace

close $nf

close $nd

# NAM

exec nam out.nam &

exit 0

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3-5

TCP UDP

}

# , s1 id 0, s2 id 1

set s1 [$ns node]

set s2 [$ns node]

# , r id 2

set r [$ns node]

# , d id 3

set d [$ns node]

#s1-r 2Mbps ,10ms ,DropTail

#s2-r 2Mbps ,10ms ,DropTail

#r-d 1.7Mbps ,20ms ,DropTail

$ns duplex-link $s1 $r 2Mb 10ms DropTail

$ns duplex-link $s2 $r 2Mb 10ms DropTail

$ns duplex-link $r $d 1.7Mb 20ms DropTail

# r d Queue Limit 10

$ns queue-limit $r $d 10

# NAM

$ns duplex-link-op $s1 $r orient right-down

$ns duplex-link-op $s2 $r orient right-up

$ns duplex-link-op $r $d orient right

# r d queue NAM

$ns duplex-link-op $r $d queuePos 0.5

# TCP

set tcp [new Agent/TCP]

$ns attach-agent $s1 $tcp

set sink [new Agent/TCPSink]

$ns attach-agent $d $sink

$ns connect $tcp $sink

# NAM TCP

$tcp set fid_ 1

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