> From: Fran Lawas-Grodek [mailto:Fran.Lawas-Grodek@;grc.nasa.gov]
> Well... our development code that we are to ultimately test was
> developed on 4.1, thus we really need to try to stick with 4.1.
> It does not look like either of the above parameters are available
> until 4.7.

No worries.
Have you checked that both sides are negotiating SACK?
And both sides are negotiating a window scale option sufficiently
large? (sounds like you need a window scale option of at least 5
bits?)
And the socket-buffer to ttcp is actually being set as large
as you think? (perhaps run 'ktrace' or 'truss' on ttcp and look
for an error on the setsockopt).
http://www.rfc-editor.org/rfc/rfc1323.txt has some other
suggestions I think, but I'm guessing you've already gone
over it.

--don ([EMAIL PROTECTED] www.sandvine.com)

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