[c-nsp] Products for dealing with packet re-ordering?

heasley heas at shrubbery.net
Wed Jan 10 18:33:10 EST 2018


Wed, Jan 10, 2018 at 11:22:42PM +0000, Job Snijders:
> On Thu, Jan 11, 2018 at 01:16:44AM +0200, Saku Ytti wrote:
> > On 11 January 2018 at 01:02, heasley <heas at shrubbery.net> wrote:
> > > is that entirely true? misorder is not (should not be) immediately
> > > interpretted as loss. it does imply loss and might encite an
> > > implementation to ACK or duplicate ACK a preceding segment, but both
> > > sides should wait a reasonable time based on observed RTO for
> > > retransmission.
> > >
> > > so, if the implementation doesn't stink and the jitter isnt too bad ...
> > 
> > Implementation specific I'm sure. But at least the implementations
> > I've used while testing reordering, namely Linux, are entirely
> > intolerant to reorder, performance is immediately destroyed. I think
> > Window is same too. 
> 
> Yes, this is the case for Windows too.
> 
> The effects of reordering seem to become progressively worse as the
> latency between the two hosts increases.

hmm, i'd have expected it to decrease as the RTO increases.


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