Hi: I've set up this: node SRC1 connected to router R1, which is in turn connected to router R2 which is, in turn, connected to DST1. link from SRC1 to R1 is 10 Mb/s with delay=1ms. link between R2 and DST1 has the same parameters. Link between R1 and R2 is 1 Mb/s with delay=10ms. Then i start a TCP FTP transmission from SRC1 to DST1, pkt size=1500 B. If i understand TCP correctly, each packet sent from SRC1 to DST1 is larger and larger (hence using more bandwidth) until it overcomes the network capacity. At that moment, there will be a timeout in ACK packets from DST1 to SRC1 and sender should start sending smaller packets, hence using less bandwidth. So, when i run my sim, i expect to see channel capacity usage between R1 and R2 grow fast until it reaches 1Mb/s, then go down, and start speeding up again. However, what i get is almost constant usage of 1Mb/s at all times. Maybe i have a misconception?
I'm using Agent/TCP and Application/FTP in SRC1 and Agent/TCPSink in DST1. Thanks in advance. -- Eduardo J. Ortega - Linux user #222873 "No fake - I'm a big fan of konqueror, and I use it for everything." -- Linus Torvalds
