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TCP collapse



Has anyone ever modelled a TCP collapse using ns ?

I tried to overload a 1.5 Mbps link (with RED queueing) with 400 ftp sources 
transmitting packets of 1000 bytes. The queue on the link gets full as soon 
as all the sources start transmitting data, and sustains this maximum level. 
But it does not collapse.

I am actually trying to find a case where RED queueing would lead to a 
collapse and only SYN or ACK packets would be sent through rather than the 
actual data packets.





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