-----Original Message-----
From: Mittal Monani
Sent: Wednesday, March 31, 1999 11:51 AM
To: '[email protected]'
Subject: RE: BER and TCP/IP performance
Out of curiosity : how(if) will TCP performance be
affected PPP were to be used as the layer 2 protocol over the satellite
hop(s)?
Could somebody please point me to some sources of info
on using PPP over satellite? Any folks doing research
on that? I went through a recent thread in this list
on this subject, but it didn't lead me anywhere.
I am interested in comparing it with ATM too. How do
the following scenarios measure up against each other?
TCP--IP--PPP--ATM--RF
TCP--IP--ATM--RF
TCP--IP--PPP--RF
Thanks,
Mittal
-----Original Message-----
From: Mark Allman [mailto:[email protected]]
Sent: Wednesday, March 31, 1999 9:35 AM
To: Gertjan van Oosten; Will Ivancic
Cc: [email protected]
Subject: Re: BER and TCP/IP performance
Two quick comments....
Will Ivancic:
>
> 1E-8 or better.
Just to re-iterate the rest of Will's email... It all depends on
the traffic. I do not think there is one single right answer like
the above. I also believe that it depends on the RTT, as well. So,
TCP over LEO systems may be more tolerant of bit-errors than TCP
over GEO systems.
Gertjan van Oosten:
>
> Or you enable SACK (or any of its newer brethren), which is highly
> recommended.
This helps, especially for burst errors that hit more than one
segment. However, it does not help in that cwnd is still reduced
because the drop is misinterpreted (as congestion).
allman
--- http://roland.grc.nasa.gov/~mallman/
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