[e2e] Are we doing sliding window in the Internet?

Joe Touch touch at ISI.EDU
Fri Jan 4 21:42:49 PST 2008

Injong Rhee wrote:
> I don't see the
> penalty that users, ISPs, academics and Mr. Joe next door have paid
> because of its use. I don't see the Internet is being crashed or
> crumbling down because of CUBIC.

You don't see it because nobody is measuring it or even looking for it.
Deploying a protocol and not seeing a problem isn't proof that it's not
causing harm now, and it's not proof it won't cause harm in certain
deployment scenarios.

If "works most of the time for most people" were sufficient, we could
pare the TCP state machine down by 1/3, and cut out all options
including SACK.

Yes, not causing harm right now is a start, but it's nowhere near the end.


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