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Re: two questions about ns simulator
Looks like you think there are only men enrolled in the mailing list....
On Mon, 31 May 1999, cerberus wrote:
> Dear Sir:
> I have two questions about using the ns. I don't know if I can get the
> answers here.
>
> 1. How to trace a variable in TCP?
>
> in document 3.2.3 you wrote:
> $tcp trace cwnd_
>
> I wrote this in my program but nothing happend. I can not get any
> report about cwnd.
>
> 2. How to make a network topology like this?
>
> n1 n3
> | |
> LAN---r1------r2---LAN
> | |
> n2 n4
>
>
> Are the transport layer connection(TCP) and the DLL layer
> connection(CSMA/CD) independent?
>
>
> set tcp1 [$ns create-connection TCP $n1 TCPSink $n3 1]
> $ns make-lan "$n1 $n2" $bw $delay LL Queue/Droptail Mac/Csma/Cd
> $ns duplex-link $r1 $r2 5Mb 2ms DropTail
>
>
> Thanks a lot for ur help.
>
> -----------
> Chang-Li Yao, Student
> Department of Computer Science
> National Cheng-Kung University
> ROC
> e-mail:[email protected]
>
>