[ns] Fw: TCP + throughput and goodput calculation

[Grzegorz Pawłowski]

Hello
I'm new in ns and i need help.
My network topology is something like that

s1                                                      r1
    \                                                   /
      \                                               /
        \                                           /
s2----rout1--------------------rout2--------r2
        /                                          \
      /                                              \
    /                                                  \
s3                                                     s3

One one side I have TCP/newReno agents and FTP sources and on the other side
i have TCPSink
Type of queue manager between rout1 and rout2 is RED ( in my projekt i need
to test it)
I need to get the information about goodput and throughput in this network
and compare it with network with DropTail.
How can i get this data.
And i repeat. I'm new user so if you can show me some expamples.
I have heard that i have to add some variable to TCPSink to get amount of
bytes recived.
But i don't know how.
Is there in TCPAgent some variable wich i can see to get amount of bytes
sended ?
Thanks for your help
Grzegorz Pawlowski