Queuing Models in NS2

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M/M/1 is a system with poisson arrival time, servicing exponentially and a queue of unlimited capacity and type of FIFO Queue. This is the simplest queuing system.  NS2 supports various distributions like pareto, exponential, constant, unifrom, etc to handle the network dynamics and metrics. So it is very easy to test the given network link to monitor a given queue using any of these queuing models. The listing 3 and 4 are monitoring the link when DropTail queue is used with a capacity of finite and infinite. Listing 13.3 uses infinite capacity and Listing 13.4 uses Finite capacity The output screen shot is shown below the scripts for further understanding
Listing 3 – M/M/1 Queuing Model #new Simulator creation set ns [new Simulator] #trace file creation for capturing the UDP data set tf [open out.tr w] $ns trace-all $tf
#setting the exponential distribution param set lambda 30.0 set mu     33.0
#creation of nodes set n1 [$ns node] set n2 [$ns node] #The queue limit is 1Lakh as the capacity is infin…

How to install tracegraph in a 64 bit Linux Machine

Installing tracegraph in a 32bit machine doen't post any issues or errors. but on a 64 bit machine, you need to download the libraries that are required to run for a 32 bit software

so installing tracegraph in a 64 bit machine needs a special instruction like this

In Ubuntu and Linux Mint,

if you get error like this

bash: ./trgraph: No such file or directory

(this is mainly because you are trying to run in a 64 bit machine) 

Issue the following command,

sudo apt-get install ia32-libs 

(it may download nealy 80MB of software)


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