Author: bakari Date: 2011.11.23
很久之前自己写的一个NS2 的例子，（一个有线和无线相结合的例子，对于初学很有帮助）欢迎交流！
# Define options
set val(chan) Channel/WirelessChannel ;# 物理信道类型
set val(prop) Propagation/TwoRayGround ;# 设定无限传输模型
set val(netif) Phy/WirelessPhy ;# 网络接口类型
set val(mac) Mac/802_11 ;# MAC 层类型
set val(ifq) Queue/DropTail/PriQueue ;# 接口队列类型
set val(ll) LL ;# LLC 层类型
set val(ant) Antenna/OmniAntenna ;# 天线模型
set val(ifqlen) 50 ;# 网络接口队列的大小
set val(severnode) 1 ;# servre节点的数目
set val(nn) 10 ;# 移动节点的数目
set val(rp) DSDV ;# 设定无线路由协议
set val(x) 1000 ;# 设定拓扑范围
set val(y) 1000 ;# 设定拓扑范围
set val(stop) 31 ;#模拟的总时间
set AgentTrace ON
set RouterTrace ON
set MacTrace OFF
#设定模拟器类型
set ns [new Simulator]
#设定跟踪文件
set tracefd [open simple.tr w]
$ns trace-all $tracefd
set namtrace [open simwrls.nam w]
$ns namtrace-all $namtrace
$ns namtrace-all-wireless $namtrace $val(x) $val(y)
#设定拓扑对象
set topo [new Topography]
$topo load_flatgrid $val(x) $val(y)
set chan [new $val(chan)]
#设定god对象
# 建立一个God对象。God对象主要用来对路由协议做性能评价，它存储了节点总数，
#节点间最短路径等信息。节点的MAC对象会调用God对象，因此即使不使用也仍然要建立此对象
create-god $val(nn)
#设定sever节点
set SerNode [$ns node]
$SerNode set X_ 500
$SerNode set Y_ 800
$SerNode set Z_ 0
#$ns initial_node_pos $SerNode 10
#设置移动节点的属性
$ns node-config -adhocRouting $val(rp) \
-llType $val(ll) \
-macType $val(mac) \
-ifqType $val(ifq) \
-ifqLen $val(ifqlen) \
-antType $val(ant) \
-propType $val(prop) \
-phyType $val(netif) \
-channel $chan \
-topoInstance $topo \
-agentTrace ON \
-routerTrace ON \
-macTrace OFF \
-movementTrace OFF \
-wiredRouting ON
# ！如果一个节点放在移动节点属性之前，它就成为了有线链路的节点，如果放在移动节点属性下边，它就成了无线节点。
for {set i 1} {$i < $val(nn) } {incr i} {
set node_($i) [$ns node]
#$ns initial_node_pos $node_($i) 10
}
#设定节点的初始位置
$node_(1) set X_ 100
$node_(1) set Y_ 300
$node_(1) set Z_ 0
$node_(2) set X_ 500
$node_(2) set Y_ 300
$node_(2) set Z_ 0
#$node_(3) set X_ 120
#$node_(3) set Y_ 80
#$node_(3) set Z_ 0
$node_(4) set X_ 900
$node_(4) set Y_ 300
$node_(4) set Z_ 0
$node_(5) set X_ 200
$node_(5) set Y_ 100
$node_(5) set Z_ 0
$node_(6) set X_ 100
$node_(6) set Y_ 100
$node_(6) set Z_ 0
$node_(7) set X_ 800
$node_(7) set Y_ 100
$node_(7) set Z_ 0
$node_(8) set X_ 300
$node_(8) set Y_ 300
$node_(8) set Z_ 0
$node_(9) set X_ 700
$node_(9) set Y_ 300
$node_(9) set Z_ 0
#设定有线链路的带宽，时延，队列类型
$ns duplex-link $SerNode $node_(1) 2Mb 150ms DropTail
$ns duplex-link $SerNode $node_(2) 2Mb 150ms DropTail
$ns duplex-link $SerNode $node_(4) 2Mb 150ms DropTail
$ns duplex-link $SerNode $node_(8) 2Mb 150ms DropTail
$ns duplex-link $SerNode $node_(9) 2Mb 150ms DropTail
#设定链路队列大小
$ns queue-limit $SerNode $node_(1) 20
$ns queue-limit $SerNode $node_(2) 20
$ns queue-limit $SerNode $node_(4) 20
$ns queue-limit $SerNode $node_(8) 20
$ns queue-limit $SerNode $node_(9) 20
#监测节点间的队列
#数据包进入队列的方位设置，此表示数据包从上到下进入队列
$ns duplex-link-op $SerNode $node_(1) queuePos 0.5
$ns duplex-link-op $SerNode $node_(2) queuePos 0.5
$ns duplex-link-op $SerNode $node_(4) queuePos 0.5
$ns duplex-link-op $SerNode $node_(8) queuePos 0.5
$ns duplex-link-op $SerNode $node_(9) queuePos 0.5
#建立tcp连接
set tcp0 [new Agent/TCP]
$ns color 1 Yellow
$tcp0 set class_ 1
$ns attach-agent $SerNode $tcp0
set sink0 [new Agent/TCPSink]
$ns attach-agent $node_(1) $sink0
$ns connect $tcp0 $sink0
set tcp1 [new Agent/TCP]
$ns color 1 Yellow
$tcp1 set class_ 1
$ns attach-agent $SerNode $tcp1
set sink1 [new Agent/TCPSink]
$ns attach-agent $node_(2) $sink1
$ns connect $tcp1 $sink1
set tcp2 [new Agent/TCP]
$ns color 1 Yellow
$tcp2 set class_ 1
$ns attach-agent $SerNode $tcp2
set sink2 [new Agent/TCPSink]
$ns attach-agent $node_(4) $sink2
$ns connect $tcp2 $sink2
set tcp3 [new Agent/TCP]
$ns color 1 Yellow
$tcp3 set class_ 1
$ns attach-agent $SerNode $tcp3
set sink3 [new Agent/TCPSink]
$ns attach-agent $node_(8) $sink3
$ns connect $tcp3 $sink3
set tcp4 [new Agent/TCP]
$ns color 1 Yellow
$tcp4 set class_ 1
$ns attach-agent $SerNode $tcp4
set sink4 [new Agent/TCPSink]
$ns attach-agent $node_(9) $sink4
$ns connect $tcp4 $sink4
#设定ftp应用程序
set ftp0 [new Application/FTP]
$ftp0 attach-agent $tcp0
set ftp1 [new Application/FTP]
$ftp1 attach-agent $tcp1
set ftp2 [new Application/FTP]
$ftp2 attach-agent $tcp2
set ftp3 [new Application/FTP]
$ftp3 attach-agent $tcp3
set ftp4 [new Application/FTP]
$ftp4 attach-agent $tcp4
#建立udp连接
set udp0 [new Agent/UDP]
$ns set color 2 Red
$udp0 set class_ 2
$ns attach-agent $node_(2) $udp0
set null0 [new Agent/Null]
$ns attach-agent $node_(5) $null0
$ns connect $udp0 $null0
set cbr0 [new Application/Traffic/CBR]
$cbr0 set packetSize0 100
$cbr0 set rate0 2Mb
$cbr0 attach-agent $udp0
set udp1 [new Agent/UDP]
$ns set color 2 Red
$udp1 set class_ 2
$ns attach-agent $node_(1) $udp1
set null1 [new Agent/Null]
$ns attach-agent $node_(6) $null1
$ns connect $udp1 $null1
set cbr1 [new Application/Traffic/CBR]
$cbr1 set packetSize1 100
$cbr1 set rate1 2Mb
$cbr1 attach-agent $udp1
set udp2 [new Agent/UDP]
$ns set color 2 Red
$udp2 set class_ 2
$ns attach-agent $node_(9) $udp2
set null2 [new Agent/Null]
$ns attach-agent $node_(7) $null2
$ns connect $udp2 $null2
set cbr2 [new Application/Traffic/CBR]
$cbr2 set packetSize2 100
$cbr2 set rate2 2Mb
$cbr2 attach-agent $udp2
#模拟节点的运动位置和速度
$ns at 1.0 "$node_(5) setdest 850.0 100.0 50.0"
$ns at 2.5 "$node_(6) setdest 900.0 100.0 80.0"
$ns at 13.0 "$node_(7) setdest 500.0 100.0 30.0"
#时间调度器设置流量发生时间
$ns at 1.0 "$ftp0 start"
$ns at 30.5 "$ftp0 stop"
$ns at 1.0 "$ftp1 start"
$ns at 30.5 "$ftp1 stop"
$ns at 1.0 "$ftp2 start"
$ns at 30.5 "$ftp2 stop"
$ns at 1.0 "$ftp3 start"
$ns at 30.5 "$ftp3 stop"
$ns at 1.0 "$ftp4 start"
$ns at 30.5 "$ftp4 stop"
$ns at 1.0 "$cbr0 start"
$ns at 16.2 "$cbr0 stop"
$ns at 2.0 "$cbr1 start"
$ns at 13.0 "$cbr1 stop"
$ns at 13.0 "$cbr2 start"
$ns at 24.0 "$cbr2 stop"
#结束nam和simulator
$ns at $val(stop) "stop"
$ns at $val(stop) "puts \"end simulator\"; $ns halt"
proc stop {} {
global ns tracefd namtrace
$ns flush-trace
close $tracefd
close $namtrace
exec nam simwrls.nam &
exit 0
}
#开始模拟
$ns run
有图有真相：
