You need to increase the client's RECEIVE window, the server normally
can scale up to quite large send windows by default.
Make sure you enable SACK and RFC1323. Use TCPTune for this
http://moat.nlanr.net/Software/TCPtune/
jm
At 5:00 PM +0200 5/28/01, Dusan Statelov wrote:
>Hello:
>
>As we are now in time pressure I would like ask you for advices how
>to properly configure Win2000 or Linux Http data server in order to
>achieve bigger TCP window and improve Single TCP connection from
>poor 20-30 kbyte/s (for RTT 240 ms) to according to us achievable 1
>mbps.
>We have changed "Default Receive Window", but TCP is running at only
>20-30 kbyte/s what would corresponde to 8 kbyte Window rather then
>to 64 kbyte.
>I assume there are other TCP registry entities which influence Sender Window.
>
>Here is a configuration emulating satellite internet:
>
>Http Data Server [Linux or Win2000] -> DVB/ip -> DVB-S Modulator ->
>L band output -> PC DVB board [SkyMedia - Telemann, TT DVB
>Technotrend] ->
>client PC [Win98] o---------------o connected to DVB/ip GW in return via LAN
>LAN RTT 20 ms
>Artefficial delay in DVB/ip GW 220 ms (in order to simulate long RTT
>for satellite)
>
>Windows98
>Default Receive Window to max.values 65535
>Data Sever Win2000
>Default Receive Window to max.values 65535 (we tried even 0,5 Mbyte
>with no effect)
>RTT 240 ms
>Single TCP connection 20 - 30 kbyte/s
>
>Thanks in advance.
>
>Dusan Statelov
>Managing Director
>Main Data,s.r.o.
><mailto:[email protected]>mailto:[email protected]
>
>Tel: +421 7 54789 586
>Fax: +421 7 54789 585
>GSM: +421 905 606 027
><http://www.maindata.sk>http://www.maindata.sk
>
>
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