转：[Ref] NS2 Multicast Example / NS2 多播示例

# Create scheduler

#Create an event scheduler wit multicast turned on

set ns [new Simulator -multicast on]

#$ns multicast

 

#Turn on Tracing

set tf [open output.tr w]

$ns trace-all $tf

 

# Turn on nam Tracing

set fd [open mcast.nam w]

$ns namtrace-all $fd

 

# Create nodes

set n0 [$ns node]

set n1 [$ns node]

set n2 [$ns node]

set n3 [$ns node]

set n4 [$ns node]

set n5 [$ns node]

set n6 [$ns node]

set n7 [$ns node]

 

# Create links

$ns duplex-link $n0 $n2 1.5Mb 10ms DropTail

$ns duplex-link $n1 $n2 1.5Mb 10ms DropTail

$ns duplex-link $n2 $n3 1.5Mb 10ms DropTail

$ns duplex-link $n3 $n4 1.5Mb 10ms DropTail

$ns duplex-link $n3 $n7 1.5Mb 10ms DropTail

$ns duplex-link $n4 $n5 1.5Mb 10ms DropTail

$ns duplex-link $n4 $n6 1.5Mb 10ms DropTail

 

# Routing protocol: say distance vector

#Protocols: CtrMcast, DM, ST, BST

set mproto DM

set mrthandle [$ns mrtproto $mproto {}]

 

# Allocate group addresses

set group1 [Node allocaddr]

set group2 [Node allocaddr]

 

# UDP Transport agent for the traffic source

set udp0 [new Agent/UDP]

$ns attach-agent $n0 $udp0

$udp0 set dst_addr_ $group1

$udp0 set dst_port_ 0

set cbr1 [new Application/Traffic/CBR]

$cbr1 attach-agent $udp0

 

# Transport agent for the traffic source

set udp1 [new Agent/UDP]

$ns attach-agent $n1 $udp1

$udp1 set dst_addr_ $group2

$udp1 set dst_port_ 0

set cbr2 [new Application/Traffic/CBR]

$cbr2 attach-agent $udp1

 

# Create receiver

set rcvr1 [new Agent/Null]

$ns attach-agent $n5 $rcvr1

$ns at 1.0 "$n5 join-group $rcvr1 $group1"

 

set rcvr2 [new Agent/Null]

$ns attach-agent $n6 $rcvr2

$ns at 1.5 "$n6 join-group $rcvr2 $group1"

 

set rcvr3 [new Agent/Null]

$ns attach-agent $n7 $rcvr3

$ns at 2.0 "$n7 join-group $rcvr3 $group1"

 

set rcvr4 [new Agent/Null]

$ns attach-agent $n5 $rcvr1

$ns at 2.5 "$n5 join-group $rcvr4 $group2"

set rcvr5 [new Agent/Null]

$ns attach-agent $n6 $rcvr2

$ns at 3.0 "$n6 join-group $rcvr5 $group2"

set rcvr6 [new Agent/Null]

$ns attach-agent $n7 $rcvr3

$ns at 3.5 "$n7 join-group $rcvr6 $group2"

 

$ns at 4.0 "$n5 leave-group $rcvr1 $group1"

$ns at 4.5 "$n6 leave-group $rcvr2 $group1"

$ns at 5.0 "$n7 leave-group $rcvr3 $group1"

 

$ns at 5.5 "$n5 leave-group $rcvr4 $group2"

$ns at 6.0 "$n6 leave-group $rcvr5 $group2"

$ns at 6.5 "$n7 leave-group $rcvr6 $group2"

 

# Schedule events

$ns at 0.5 "$cbr1 start"

$ns at 9.5 "$cbr1 stop"

 

$ns at 0.5 "$cbr2 start"

$ns at 9.5 "$cbr2 stop"

 

#post-processing

$ns at 10.0 "finish"

proc finish {} {

   global ns tf

   $ns flush-trace

   close $tf

   exec nam mcast.nam &

   exit 0

}

 

# For nam

#Colors for packets from two mcast groups

$ns color 10 red

$ns color 11 green

$ns color 30 purple

$ns color 31 green

 

# Manual layout: order of the link is significant!

#$ns duplex-link-op $n0 $n1 orient right

#$ns duplex-link-op $n0 $n2 orient right-up

#$ns duplex-link-op $n0 $n3 orient right-down

 

# Show queue on simplex link n0->n1

#$ns duplex-link-op $n2 $n3 queuePos 0.5

 

# Group 0 source

$udp0 set fid_ 10

$n0 color red

$n0 label "Source 1"

 

# Group 1 source

$udp1 set fid_ 11

$n1 color green

$n1 label "Source 2"

 

$n5 label "Receiver 1"

$n5 color blue

$n6 label "Receiver 2"

$n6 color blue

$n7 label "Receiver 3"

$n7 color blue

 

#$n2 add-mark m0 red

#$n2 delete-mark m0"

 

# Animation rate

$ns set-animation-rate 3.0ms

 

$ns run

 

Reference: https://sites.google.com/site/pengjungwu/Home/ns2-multicast-example