我正在开展一个项目，我在模拟工作时遇到了问题。我总共有22个节点，当我建立连接时，我没有在某些链接上获取数据包。更具体地说，我从节点4到节点2以及节点2的任何子节点都有连接和成功的数据包发送。当我尝试在其他任何地方发送数据包时，都没有传送。我彻底查看了我的代码，似乎无法弄清楚我做错了什么。任何指向正确的方向将不胜感激。
Main File
#Create a simulator object
set ns [new Simulator]
#Tell the simulator to use dynamic routing
$ns rtproto DV
#Create a trace file
set tracefd [open project2trace.tr w]
$ns trace-all $tracefd
#Define a ‘finish’ procedure
proc finish {} {
global ns nf
$ns flush-trace
exit 0
}
#Create nodes
set n1 [$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]
set n8 [$ns node]
set n9 [$ns node]
set n10 [$ns node]
set n11 [$ns node]
set n12 [$ns node]
set n13 [$ns node]
set n14 [$ns node]
set n15 [$ns node]
set n16 [$ns node]
set n17 [$ns node]
set n18 [$ns node]
set n19 [$ns node]
set n20 [$ns node]
set n21 [$ns node]
set n22 [$ns node]
#Create 1Mbps connections
#Create a duplex link between the nodes 1 and subnodes
$ns duplex-link $n1 $n11 1Mb 10ms DropTail
$ns duplex-link $n1 $n12 1Mb 10ms DropTail
$ns duplex-link $n1 $n13 1Mb 10ms DropTail
$ns duplex-link $n1 $n14 1Mb 10ms DropTail
#Create a duplex link between the nodes 2 and subnodes
$ns duplex-link $n2 $n6 1Mb 10ms DropTail
$ns duplex-link $n2 $n7 1Mb 10ms DropTail
$ns duplex-link $n2 $n8 1Mb 10ms DropTail
$ns duplex-link $n2 $n9 1Mb 10ms DropTail
$ns duplex-link $n2 $n10 1Mb 10ms DropTail
#Create a duplex link between the nodes 4 and subnodes
$ns duplex-link $n4 $n19 1Mb 10ms DropTail
$ns duplex-link $n4 $n20 1Mb 10ms DropTail
$ns duplex-link $n4 $n21 1Mb 10ms DropTail
$ns duplex-link $n4 $n22 1Mb 10ms DropTail
#Create a duplex link between the nodes 5 and subnodes
$ns duplex-link $n5 $n15 1Mb 10ms DropTail
$ns duplex-link $n5 $n16 1Mb 10ms DropTail
$ns duplex-link $n5 $n17 1Mb 10ms DropTail
$ns duplex-link $n5 $n18 1Mb 10ms DropTail
#Create 2Mbps links
#Create a duplex link between nodes 1 and 3
$ns duplex-link $n1 $n3 2Mb 20ms DropTail
#Create a duplex link between nodes 3 and 5
$ns duplex-link $n3 $n5 2Mb 20ms DropTail
#Create 4Mbps links
#Create a duplex link between nodes 2 and 3
$ns duplex-link $n2 $n3 4Mb 40ms DropTail
#Create a duplex link between nodes 2 and 4
$ns duplex-link $n2 $n4 4Mb 40ms DropTail
#Create a duplex link between nodes 3 and 4
$ns duplex-link $n3 $n4 4Mb 40ms DropTail
#Create a UDP agent and attach it to node n4
set udp0 [new Agent/UDP]
$ns attach-agent $n4 $udp0
# Create a CBR traffic source and attach it to udp0
set cbr0 [new Application/Traffic/CBR]
$cbr0 set packetSize_ 500
$cbr0 set interval_ 0.005
$cbr0 set random_ 1
$cbr0 attach-agent $udp0
#Create a Null agent (a traffic sink) and attach it to node n8
set null0 [new Agent/Null]
$ns attach-agent $n8 $null0
#Connect CBR to Null agent
$ns connect $udp0 $null0
# Create a CBR traffic source and attach it to udp0
set cbr1 [new Application/Traffic/CBR]
$cbr1 set packetSize_ 500
$cbr1 set interval_ 0.005
$cbr1 set random_ 1
$cbr1 attach-agent $udp0
#Create a Null agent (a traffic sink) and attach it to node n18
set null1 [new Agent/Null]
$ns attach-agent $n18 $null1
#Connect CBR to Null agent
$ns connect $udp0 $null1
# Create a CBR traffic source and attach it to udp0
set cbr2 [new Application/Traffic/CBR]
$cbr2 set packetSize_ 500
$cbr2 set interval_ 0.005
$cbr2 set random_ 1
$cbr2 attach-agent $udp0
#Create a Null agent (a traffic sink) and attach it to node n21
set null2 [new Agent/Null]
$ns attach-agent $n21 $null2
#Connect CBR to Null agent
$ns connect $udp0 $null2
# Create a CBR traffic source and attach it to udp0
set cbr3 [new Application/Traffic/CBR]
$cbr3 set packetSize_ 500
$cbr3 set interval_ 0.005
$cbr3 set random_ 1
$cbr3 attach-agent $udp0
#Create a Null agent (a traffic sink) and attach it to node n10
set null3 [new Agent/Null]
$ns attach-agent $n10 $null3
#Connect CBR to Null agent
$ns connect $udp0 $null3
# Create a CBR traffic source and attach it to udp0
set cbr4 [new Application/Traffic/CBR]
$cbr4 set packetSize_ 500
$cbr4 set interval_ 0.005
$cbr4 set random_ 1
$cbr4 attach-agent $udp0
#Create a Null agent (a traffic sink) and attach it to node n11
set null4 [new Agent/Null]
$ns attach-agent $n11 $null4
#Connect CBR to Null agent
$ns connect $udp0 $null4
# Create a CBR traffic source and attach it to udp0
set cbr5 [new Application/Traffic/CBR]
$cbr5 set packetSize_ 500
$cbr5 set interval_ 0.005
$cbr5 set random_ 1
$cbr5 attach-agent $udp0
#Create a Null agent (a traffic sink) and attach it to node n16
set null5 [new Agent/Null]
$ns attach-agent $n16 $null5
#Connect CBR to Null agent
$ns connect $udp0 $null5
# Create a CBR traffic source and attach it to udp0
set cbr6 [new Application/Traffic/CBR]
$cbr6 set packetSize_ 500
$cbr6 set interval_ 0.005
$cbr6 set random_ 1
$cbr6 attach-agent $udp0
#Create a Null agent (a traffic sink) and attach it to node n13
set null6 [new Agent/Null]
$ns attach-agent $n13 $null6
#Connect CBR to Null agent
#$ns connect $udp0 $null6
#Schedule events for the CBR agent
$ns at 1.0 "$cbr0 start"
$ns at 1.0 "$cbr1 start"
$ns at 1.0 "$cbr2 start"
$ns at 2.0 "$cbr3 start"
$ns at 2.0 "$cbr4 start"
$ns at 2.0 "$cbr5 start"
$ns rtmodel-at 6.0 down $n2 $n4
$ns rtmodel-at 2.0 up $n2 $n4
$ns at 10.0 "$cbr0 stop"
$ns at 10.0 "$cbr1 stop"
$ns at 10.0 "$cbr2 stop"
$ns at 2.0 "$cbr3 stop"
$ns at 2.0 "$cbr4 stop"
$ns at 2.0 "$cbr5 stop"
$ns at 10.0 "finish"
#Run the simulation
$ns run
现在代码的方式，将提供0个pakets。如果我注释掉除第一个连接之外的所有内容，我会收到数据包。当我取消注释其他任何内容时，我会丢失所有数据包。这是我的awk文件。
cbr.awk
BEGIN {
node = 1;
time1 = 0.0;
time2 = 0.0;
num_packets = 0;
}
{
time2 = $2;
if (time2 - time1 > 0.050) {
throughput = bytes_counter / (time2 - time1);
printf("%f \t %f\n", time2, throughput) > "dataset.xls";
time1 = $2;
bytes_counter = 0;
}
if ($1 == "r" && $4 == node && $5 == "cbr") {
bytes_counter += $6;
num_packets++;
}
}
END {
print("********");
printf("Total number of packets received: \n%d\n", num_packets);
print("********");
}
我很茫然。从字面上看。