Re: [ns] TCP source dropping packets

[Adeel Baig <adeelbaig@yahoo.com>]

Hi
About the drops at the source.It also depends on the
link delay.If you keep the delay very small then u
will observe the drops at the source.
About the default queue size .. yes there is a default
queue size in the link which is 50.You can manipulate
it by changing it in ns-default.tcl.

Hope this will help.
Best of Luck

-Adeel

--- VJ VJ <vjragh@hotmail.com> wrote:
> Hi,
>   Iam trying to simulate multiple source nodes
> (n0,n1,n2,n3) simultaneously 
> sending traffic to node n5 through a bottlneck node
> n4.  From the nam 
> simulation, I can see source node dropping packets,
> the
> problem goes away when I introduce a buffer to the
> links attached to
> nodes n0 to n4 or n1 to n4 or n2 to n4 or n3 to n4.
> But I see the source 
> dropping packets with buffering for some other link
> bw/delay combination. 
> Does anyone have any insight to this problem, how
> does the ns-2 behave when 
> no buffer is attached to the link ? does it have any
> default queue size 
> attached to the link ? Any help will be of great use
> to me.
> 
> Thankyou very much,
> Vijay
>
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