[ns] TCP source problem

["VJ VJ" <vjragh@hotmail.com>]

Hi,
   I have a problem with ns-2 TCP source. In ns-2, if the window size of the TCP is greater than the BW*Delay product of the link, it leads to packet drops in the source. Is this expected behaviour for any source in commercial TCP implemetations ? Or the TCP implemetations are expected to refrain from sending when they cannot send any more ? Does anybody have any information about any commercially available TCP source and how they behave in this scenario ? How does unix or windows implementations behave ? Is use of large buffers at the source is advisable ? Can someone help ??
Any comments/help will be greatly appreciated.
 
Thankyou very much
Vijay

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