Date: Fri, 9 Apr 1999 15:49:43 +0200 (MET DST) From: Emmanuel Duros <Emmanuel.Duros@sophia.inria.fr> To: freebsd-questions@freebsd.org Subject: RFC 1323 - How to make it work ? Message-ID: <199904091349.PAA09809@chouette.inria.fr>
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Hi,
I am trying to get speed improvement using RFC 1323 to download files
via a satellite link without much success(!).
I have 2 FreeBSD (2.2.7) boxes (bsd 1 and bsd 2) which are connected via
a broadcast satellite link and an Ethernet LAN.
satellite link 6Mbps
--------->------------>------------>----------
| |
------- -------
|bsd 1| |bsd 2|
------- -------
| |
----------------------------------------------
Ethernet LAN 10Mbps
Routing is configured in such way:
- bsd 1 sends packets to bsd 2 via the sat link
- bsd 2 send packets to bsd 1 vian the LAN
The RTT is about 270ms.
When downloading a file (client is bsd 1 and server is bsd 2), the
maximum data rate I have been able to get on this topology is
50-60 Kbytes/s.
And this, whatever the value of net.inet.tcp.rfc1323 (0,1) on both
freebsd boxes. When I change the value net.inet.tcp.rfc1323, it seems
that nothing really happens.
I am pretty sure I could get a much better data rate than this...
Am I doing anything wrong ? I also played with net.inet.tcp.rfc1644
without success.
Any help will be very much appreciated !
Thanks
Emmanuel Duros
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