[e2e] Can feedback be generated more fast in ECN?

[Richard Wendland]

>  o It's unlikely that the receiver has an rwin of more than eight
>    segments. It's certainly not impossible, but the current
>    demographic profile of the typical bulk-receiver (this is a
>    receiver-side congestion scenario, after all) is 8192 bytes
>    in my work.

This will probably increase in an ECN deployment timeframe.  Windows 9x
and NT4 have a 8k default rwin, which will probably be the typical
current client.  But Windows Me & 2000 have a 16k default rwin, and will
probably dominate within a few years.  Other popular systems also have
larger default rwin, currently eg Linux 32k, FreeBSD 16k, Solaris 16k/24k.

So rwin of 11 or more segments should be widespread for ECN.

NB rwin is often rounded to a multiple of effective MSS, explaining why
numbers like 17520 and 32120 bytes are often seen as a window size.

	Richard
-- 
Richard Wendland				richard at wendland.org.uk