ns2 无法连接到现有的 nam 实例 [英] ns2 cannot connect to existing nam instance

问题描述

我正在尝试使用 nam 运行以下代码.

I'm trying to run the below code using nam.

set ns [new Simulator]

set nf [open lab1.nam w]
$ns namtrace-all $nf

set f [open lab1.tr w]

proc record {} {

global sink f
set ns [Simulator instance]

set time 0.12

set bw [$sink set bytes_]

set now [$ns now]

puts $f "$now [expr (($bw/$time)*8/1000000)]"

$sink set bytes_ 0

$ns at [expr $now+$time] "record"
}


proc finish {} {
    global ns nf f
    $ns flush-trace
    close $nf
    close $f
    exit 0
}


set n0 [$ns node]
set n1 [$ns node]

$ns duplex-link $n0 $n1 4Mb 10ms DropTail


set udp0 [new Agent/UDP]
$udp0 set packetSize_ 1500
$ns  attach-agent $n0 $udp0

set traffic0 [new Application/Traffic/CBR]

$traffic0 set packetsize_ 1500
$traffic0 set interval_ 0.01
$traffic0 attach-agent $udp0

set sink [new Agent/LossMonitor]
$ns attach-agent $n1 $sink

$ns connect $udp0 $sink


$ns at 0.0 "record"
$ns at 2.0 "$traffic0 start"
$ns at 10.0 "$traffic0 stop"

$ns at 12.0 "finish"
$ns run

我正在尝试使用 VirtualBox 和 Windows 7 32 位在虚拟机上运行它.

I'm trying to run it on a Virtual Machine using VirtualBox with windows 7 32bit.

首先在 cmd 上执行命令 ns lab1.tcl在此之后，我尝试使用命令 nam lab1.nam 打开 nam .当我这样做时，我收到消息

On cmd first i execute the command ns lab1.tcl After this im trying to open nam , using the command nam lab1.nam. When i do this, i get the message

Nam 实际上正在运行但没有正常运行，这意味着它总是创建 210 字节的数据包，我的代码不会影响我给出的任何数据包大小.

Nam is actually then running but not properly,meaning it always creates packets of 210 bytes and my code doesn't affect this whatever packetsize i give.

推荐答案

无法连接到现有的 nam 实例

cannot connect to existing nam instance

不是错误.当不存在 nam 窗口时，Nam 将随时显示该消息.

Not an error. Nam will show that message any time, when no nam window is present.

我的测试:$ ns235-64-orig user7375077.tcl ... 结果:lab1.nam 288.5kB, lab1.tr 3.3kB.

My test : $ ns235-64-orig user7375077.tcl ... Result : lab1.nam 288.5kB, lab1.tr 3.3kB .

$ nam lab1.nam : OK ...

使用了 ns-2.35 股票.没有补丁..... 您是否添加了一些可能使 nam 工作不佳的更改?(或者可能是 Cygwin 创建的 nam 已损坏?)

A stock ns-2.35 was used. No patching. .... May be you added some changes which can make nam work poorly ? ( Or may be it is the Cygwin created nam being corrupt ? )

建议:使用正版 Linux 操作系统使您的ns2 工作".轻松安装:1) 安装VirtualBox".2) 将 Linux 操作系统安装到 VirtualBox 中.安全的操作系统选择:Redhat CentOS 6.8 http://ftp.funet.fi/pub/mirrors/centos.org/6.8/isos/x86_64/CentOS-6.8-x86_64-LiveCD.iso

Suggestions : Make your "ns2 work" with a genuine Linux OS. Easy install : 1) Install 'VirtualBox'. 2) Install the Linux OS(´s) into VirtualBox. The safe OS choice : Redhat CentOS 6.8 http://ftp.funet.fi/pub/mirrors/centos.org/6.8/isos/x86_64/CentOS-6.8-x86_64-LiveCD.iso

这篇关于ns2 无法连接到现有的 nam 实例的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！