NS2网络模拟(6)-homework02.tcl

  1: #NS2_有线部分\homework02.tcl

  2:

  3: #Create a simulator object

  4: set ns [new Simulator]

  5:

  6: #Define different colors for data flows

  7: $ns color 1 Blue

  8: $ns color 2 Red

  9:

 10: #Open the nam trace file

 11: set nf [open szsh.nam w]

 12: $ns namtrace-all $nf

 13:

 14: #Open the trace record file

 15: set nd [open szsh.tr w]

 16: $ns trace-all $nd

 17:

 18: #Define a 'finish' procedure

 19: proc finish {} {

 20:     global ns nf nd

 21:     $ns flush-trace

 22:     #Close the trace file

 23:     close $nf

 24:     #Close the record file

 25:     close $nd

 26:     #Execute nam on the trace file

 27:     exec nam szsh.nam &

 28:     exit 0

 29: }

 30:

 31: #Create two nodes

 32: set NODE_ShenZhen [$ns node]

 33: $NODE_ShenZhen color red

 34: $NODE_ShenZhen shape circle

 35: $NODE_ShenZhen label "ShenZhen"

 36: $NODE_ShenZhen label-color red

 37: $NODE_ShenZhen label-at up

 38:

 39: set NODE_ShangHai [$ns node]

 40: $NODE_ShangHai color blue

 41: $NODE_ShangHai shape circle

 42: $NODE_ShangHai label "ShangHai"

 43: $NODE_ShangHai label-color blue

 44: $NODE_ShangHai label-at down

 45:

 46:

 47: #Create a duplex link between the nodes

 48: $ns duplex-link $NODE_ShenZhen $NODE_ShangHai 1Mb 100ms DropTail

 49:

 50: #Monitor the queue for the link between node 2 and node 3

 51: $ns duplex-link-op $NODE_ShenZhen $NODE_ShangHai queuePos 0.5

 52: $ns duplex-link-op $NODE_ShenZhen $NODE_ShangHai color green

 53: $ns duplex-link-op $NODE_ShenZhen $NODE_ShangHai orient right

 54:

 55: #Create a UDP agent and attach it to node NODE_ShenZhen

 56: set Agent_Sender [new Agent/UDP]

 57: $Agent_Sender set agent_addr_   1000

 58: $Agent_Sender set agent_port_   100

 59: $ns attach-agent $NODE_ShenZhen $Agent_Sender

 60:

 61: ## Create a Exponential traffic source and attach it to Agent_Sender

 62: #set APP_EXP [new Application/Traffic/Exponential]

 63: #$APP_EXP set packetSize_    400

 64: #$APP_EXP set burst_time_    400ms

 65: #$APP_EXP set idle_time_     100ms

 66: #$APP_EXP set rate_          150kb

 67: #$APP_EXP attach-agent $Agent_Sender

 68:

 69: set APP_PARETO [new Application/Traffic/Pareto]

 70: $APP_PARETO set packetSize_     400

 71: $APP_PARETO set burst_time_     400ms

 72: $APP_PARETO set idle_time_      100ms

 73: $APP_PARETO set rate_           100kb

 74: $APP_PARETO set shape_          1.2

 75: $APP_PARETO attach-agent $Agent_Sender

 76:

 77: #Create a Null agent (a traffic sink) and attach it to node NODE_ShangHai

 78: set Agent_Receiver [new Agent/Null]

 79: $Agent_Receiver set dst_addr_   2000

 80: $Agent_Receiver set dst_port_   200

 81: $ns attach-agent $NODE_ShangHai $Agent_Receiver

 82:

 83: #Connect the traffic source with the traffic sink

 84: $ns connect $Agent_Sender $Agent_Receiver

 85:

 86: #Schedule events for the CBR agent

 87: $ns at 0.2 "$APP_PARETO start"

 88: $ns at 0.8 "$APP_PARETO stop"

 89:

 90: #Call the finish procedure after 5 seconds of simulation time

 91: $ns at 1.0 "finish"

 92:

 93: #Run the simulation

 94: $ns run

 95: