Transfer Rate Upload/Download

Unanswered Question
Feb 20th, 2010

Dear Freindzs,

I am looking a solution / answer for a querry related to FTP upload & download. However this querry is not directly related to Cisco, But reason for raising this problem in this forum is that i have searched a lot but did'nt find any convincing reply. If anyone of you can spend some time on this to reply. please...

1) We are a ISP at India. We are getting querry related to USA sites/FTP (Download & Upload) from our customers since couple of time.

Problem :-  Customers/We are not getting upload / download transfer rate more then 1.8 - 2Mbps even on high bandwidth at our customer backend. i.e DS3 or STM-1. in short in all cases/bandwidth the upload & download for USA sites/FTP are not reaching beyond 2 Mbps.

We have checked all our peering / routing all fine and infact tryed different-different combinations/routing but the response from abroad sites are still not more then 2 Mbps even with best possible combinations.

2) For Eg:- a customer having 4 Mbps(1:1) internet link from us. Hence the standard transfer rate should be 512KB/s(or close to this) while upload & download. But while downloading or upload to FTP servers. sometime we are getting Channelised response (transfer rate) in multiple sessions. i.e 256KB/s in one and 256KB/s in other, so total 512KB/s. question is what are the all possible reasons that why we are not getting the full or even close to full transfer rate in single session (512KB/s).

3) What are the factors which impacting the download / upload response except routing. How we can get know or investigate that particular FTP server having bandwidth contraints or having policy configured to limit the upload/download session..

4) If anyone have some good documents on FTP/ Upload or Download working with key points...kindly share

****

I have this problem too.
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Ganesh Hariharan Mon, 02/22/2010 - 02:58

Dear Freindzs,

I am looking a solution / answer for a querry related to FTP upload & download. However this querry is not directly related to Cisco, But reason for raising this problem in this forum is that i have searched a lot but did'nt find any convincing reply. If anyone of you can spend some time on this to reply. please...

1) We are a ISP at India. We are getting querry related to USA sites/FTP (Download & Upload) from our customers since couple of time.

Problem :-  Customers/We are not getting upload / download transfer rate more then 1.8 - 2Mbps even on high bandwidth at our customer backend. i.e DS3 or STM-1. in short in all cases/bandwidth the upload & download for USA sites/FTP are not reaching beyond 2 Mbps.

We have checked all our peering / routing all fine and infact tryed different-different combinations/routing but the response from abroad sites are still not more then 2 Mbps even with best possible combinations.

2) For Eg:- a customer having 4 Mbps(1:1) internet link from us. Hence the standard transfer rate should be 512KB/s(or close to this) while upload & download. But while downloading or upload to FTP servers. sometime we are getting Channelised response (transfer rate) in multiple sessions. i.e 256KB/s in one and 256KB/s in other, so total 512KB/s. question is what are the all possible reasons that why we are not getting the full or even close to full transfer rate in single session (512KB/s).

3) What are the factors which impacting the download / upload response except routing. How we can get know or investigate that particular FTP server having bandwidth contraints or having policy configured to limit the upload/download session..

4) If anyone have some good documents on FTP/ Upload or Download working with key points...kindly share

****

Hi,

The answer depends on the operating systems on the hosts not on the routers check out the below link to detailed procedures on different o.s. :

http://www.psc.edu/networking/projects/tcptune/

for example

http://www.psc.edu/networking/projects/tcptune/#WindowsXP

for Win XP

Hope to help

Ganesh.H

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