Hello,
is there a maximum of data, that be can send with ftp?
I simulate ftp and calculate the bandwidth with the proc recordftp.
The transfer time for 500Mbyte,1Gbyte and 2Gbyte looks ok, but if i send
3Gbyte, 4Gbyte or more i get the same transfer time for each of them.
Is there something like maxpkts or max transfer data that must be set ?
(for ftp ot tcp)
$ns at 1000.0 "$ftp0 send 500000000" ;# 500Mbyte
$ns at 2000.0 "$ftp0 send 1000000000" ;# 1Gbyte
$ns at 3000.0 "$ftp0 send 2000000000" ;# 2Gbyte
$ns at 4000.0 "$ftp0 send 3000000000" ;# 3Gbyte
$ns at 5000.0 "$ftp0 send 4000000000" ;# 4Gbyte
$ns at 6000.0 "$ftp0 send 40000000000";#40Gbyte
proc recordftp {} {
global sink0 f0
set ns [Simulator instance]
#Set the time after which the procedure should be called again
set time 0.25
#How many bytes have been received by the traffic sinks?
set bw0 [$sink0 set bytes_]
#Get the current time
set now [$ns now]
#Calculate the bandwidth (in MBit/s) and write it to the files
puts $f0 "$now [expr $bw0/$time*8/1000000]"
#Reset the bytes_ values on the traffic sinks
$sink0 set bytes_ 0
#Re-schedule the procedure
$ns at [expr $now+$time] "recordftp"
}
Best Regards,
Mirco
