Re: [ns] problems with the ssthresh_ variable

[Marceau Coupechoux <marceau.coupechoux@ms.alcatel.fr>]

I don't think so. If you look at Steven's book on TCP/IP, the ssthresh
is initialized to an arbitrary high value. Practically, it is the same
as initializing it to the advertised window window_,
Marceau

Beatriz Hargrave da Silva wrote:
> 
> Thanks Marceau !
> 
> But, is there a way to change the value of the ssthresh_ variable in my
> tcl program without having to change reset() in tcp.cc ??
> 
> Regards,
> 
> Beatriz
> 
> Marceau Coupechoux wrote:
> >
> > Hi,
> > At the beginning of the tcp connection, ssthresh is initilized at
> > window_.
> > If you want to change that, see the function reset() in tcp.cc,
> > Marceau
> >
> > Beatriz Hargrave da Silva wrote:
> > >
> > > Dear all,
> > >
> > > I tried to use the following tcl code:
> > >
> > > Agent/TCP set ssthresh_ 10
> > >
> > > or
> > >
> > > $tcp set ssthresh_ 10
> > >
> > > to change the value of the variable ssthresh_, but it doens�t work.
> > > Instead, what is determing the changing point of the increase of the
> > > congestion window from exponential (slow start) to linear is the value
> > > of the variable window_ (which is the variable for the maximum
> > > advertised window of the receiver).
> > >
> > > Does anybody knows what is happening or what should I do ???
> > >
> > > Thank you very much.
> > >
> > > Beatriz
> >
> > --
> > Marceau Coupechoux
> > --------------------------------------
> > Alcatel CIT Corporate Research Center
> > Radio Department (UTR)
> >
> > Route de Nozay 91460 Marcoussis France
> > tel : 01 69 63 43 59 fax : 43 60
> > mel : marceau.coupechoux@ms.alcatel.fr
> > --------------------------------------

-- 
Marceau Coupechoux
--------------------------------------
Alcatel CIT Corporate Research Center
Radio Department (UTR)

Route de Nozay 91460 Marcoussis France
tel : 01 69 63 43 59 fax : 43 60
mel : marceau.coupechoux@ms.alcatel.fr
--------------------------------------