Dear all,
Defining the loss rate in tcl script and ns code gives the different results 
(number of sent, received packets). That is, I am defining loss rate in 
ns-default.tcl file with the following line;

                ErrorModel set rate_ 0.10

For example this gives the following results:
# of tcp packet sent from sender: 1955
# of tcp packet received at receiver: 1935
# of ack packet received at sender: 1722
 
Or I am defining the loss rate in tcl script with the following line
 

                $ns_ node-config -IncomingErrProc losses_module 
-OutgoingErrProc losses_module 

                 

                proc losses_module {} {

                set loss_module [new ErrorModel]

                $loss_module set rate_ 0.10

                $loss_module unit pkt

                return $loss_module

                }

For example this gives the following results:
# of tcp packet sent from sender: 5148
# of tcp packet received at receiver: 5116
# of ack packet received at sender: 5027
 
I am confused with these results. Could you please send your idea for this 
issue.
Regards,
Semra
 
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