Thomas and Sylvain,
I just chanced on a URL that might be useful to you if you are thinking
of tweaking some of the TCP parameters in Windows 98 (and other OSes).
I feel that if you increase the window size you will see an increase in
throughput.
The URL is: http://www.psc.edu/networking/perf_tune.html
Regards,
Nalin Mehta
Comsat Labs, Clarksburg, MD 20871.
Ph: 1-301-428-4582.
On Wed, 23 Feb 2000, Greg Otto wrote:
> Date: Wed, 23 Feb 2000 15:07:20 -0600
> From: Greg Otto <[email protected]>
> To: [email protected], 'Thomas Wiard' <[email protected]>
> Cc: [email protected], [email protected]
> Subject: RE: bandwidth on VSAT transfer
>
> Thomas,
>
> Based on my experiences with the Microsoft FTP servers and clients, there
> are upper layer protocol limitations with respect to how it handles passing
> data from into the TCP layers. As a result, I concur with Dave on using non
> MS products to get your throughput.
>
> Also, TFTP is a single packet per RTT acknowledgement protocol. Thus,
> unless you want 512 byte/RTT throughput, you will NOT see anything better.
>
> Greg
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On
> Behalf Of David R. Beering
> Sent: Wednesday, February 23, 2000 12:06 PM
> To: Thomas Wiard
> Cc: [email protected]; [email protected]
> Subject: RE: bandwidth on VSAT transfer
>
>
>
> Thomas:
>
> As an addendum to Fred's note ...
>
> We did some testing about a year ago with the NetManage FTP Software
> product. It is a third-party TCP stack for Win98 that supports RFC1323. See
> to recall that we were getting something like 120 Mbps single-stream over a
> GEO delay simulator. It is my understanding that NetManage has most of the
> 'knobs' to tweak the TCP parameters (window size, timers, etc.) exposed to
> the user, so this should be relatively straightforward.
>
> Good luck.
>
> Dave Beering
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On
> Behalf Of Thomas Wiard
> Sent: Wednesday, February 23, 2000 4:07 AM
> To: [email protected]
> Cc: [email protected]
> Subject: bandwidth on VSAT transfer
>
>
> Hi from France.
>
> we are testing the Comsat VSAT solution (linkway 2000) but we have a
> limitation about the bandwidth on a TFTP, FTP and RTSP transfer.
>
> for instance, on an FTP or TFTP transfer, we are up to 80 kbps on each to
> session. That is to say, if I open 4 FTP sessions, I am able to transfer 4
> different files at each 80 kbps.
> The purpose is to be able for me to transfer in one session up to 2 Mbps (my
> bandwidth on the sattelite)
>
> I am using Windows 98 on each point of the connection.
>
> Is anybody can help me ?
>
>
> a++
>
> Thomas Wiard
> [email protected]
> phone : +33 1 42 30 18 66
> mobile : +33 6 14 98 69 63
This archive was generated by hypermail 2b29 : Wed Feb 23 2000 - 18:22:22 EST