Re: Selection of Scaling Factor

From: Dave Marquardt ([email protected])
Date: Wed Dec 01 1999 - 09:26:34 EST


"Greg Otto" <[email protected]> writes:
> When using RFC1323 with Window scaling, how is the scale value selected? My
> guess is it is based on the smallest scale (left shifts) required for a 64K
> to be greater than the configured maximum.
>
> For example, if a WINDOW/HIWAT of 18,000,000 bytes is selected, then the
> scale would be 512 (275 rounded up to the nearest multiple of 12) or a left
> shift of 9x.
>
> Is this correct or what is a resource which provides a better explanation?

Well, you've described a minimal behavior, and I suspect there's a lot
of code that works as you describe. However, I know that Dave Borman
has argued in the past that you might want to change the scale
somewhat, perhaps to allow the window size to be increased by some
factor.

-Dave



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