On Tue, Jun 30, 2020 at 1:44 PM David Miller <da...@davemloft.net> wrote: > > From: Eric Dumazet <eduma...@google.com> > Date: Tue, 30 Jun 2020 13:39:27 -0700 > > > The (C) & (B) case are certainly doable. > > > > A) case is more complex, I have no idea of breakages of various TCP > > stacks if a flow got SACK > > at some point (in 3WHS) but suddenly becomes Reno. > > I agree that C and B are the easiest to implement without having to > add complicated code to handle various negotiated TCP option > scenerios. > > It does seem to be that some entities do A, or did I misread your > behavioral analysis of various implementations Mathieu? > > Thanks.
Yes, another question about Mathieu cases is do determine the behavior of all these stacks vs : SACK option TCP TS option.