Re: your mail

["Hotmail" <est88_99@hotmail.com>]

Thanks a lot for your suggestion. I really helps.

On the other hand, I think I have a concept problem as I am confused why
1. only node r1 and r2 has to be configured in both direction
2. the queue limit has to be defined in both direction for node r1 and r2

    $ns duplex-link $node_(s1) $node_(r1) 10Mb 2ms DropTail
    $ns duplex-link $node_(s2) $node_(r1) 10Mb 6ms DropTail
    $ns duplex-link $node_(r1) $node_(r2) 1.5Mb 20ms RED
    $ns queue-limit $node_(r1) $node_(r2) 25
    $ns queue-limit $node_(r2) $node_(r1) 25
    $ns duplex-link $node_(s3) $node_(r2) 10Mb 4ms DropTail
    $ns duplex-link $node_(s4) $node_(r2) 10Mb 5ms DropTail

3. Can I just configure for 1 direction ? What is the differences ?

Appreciate it if you can advise.

Thanks
Estella

----- Original Message -----
From: Haobo Yu <haoboy@isi.edu>
To: TSANG Chi Man Estella <c7609080@comp.polyu.edu.hk>
Cc: ns-users <ns-users@mash.cs.berkeley.edu>
Sent: Thursday, February 03, 2000 5:52 AM
Subject: Re: your mail


> See ~ns/tcl/ex/tcpecn.tcl, it uses otcl binding tracevar to trace a
> particular variable. Also notice if you want it to send the trace output
> into nam trace, you should say 'Agent/TCP set nam_tracevar_ true' before
> starting the trace. The default is to dump every trace to standard output.
> You can also say 'Agent/TCP set trace_all_oneline_' then "all" variables
> will be traced and dumped. However, in this case, no nam output will be
> generated.
>
> - Haobo
>
> On Wed, 2 Feb 2000, TSANG Chi Man Estella wrote:
>
> > I am a newcomer to ns.
> >
> > I am trying to use ns to monitor the congestion window, threshold,
round-trip
> > times, sequence no. etc. - In fact most of the variables in the
procedure
> > "TraceALL()" in tcp.cc.
> >
> > Please help by giving instructions and examples.
> >
> > I have attached the TCL file I have written so far.
> >
> > Thanks
> > Estella
> >
>