[e2e] What should e2e protocols know about lower layers?
faber at ISI.EDU
Fri Oct 12 09:00:22 PDT 2001
On Fri, Oct 12, 2001 at 11:39:50AM +0100, Lloyd Wood wrote:
> On Thu, 11 Oct 2001, Vernon Schryver wrote:
> > There is a difference between the two proposals, "turn off TCP checksums
> > if local" and "turn off slow start if local," that I meant to point
> > out. The first only hurts the applications or hosts that choose to
> > do it,
> Oh, you wish. Corrupted data gets transferred onwards; a TCP session
> is just a link in the chain of the life of the data.
> Nothing is truly local anymore.
I don't think that's a valid criticism. The same corruption could be
introduced by a bad disk, careless human editor, or errant program and
when the data is passed on the checksum on the non-local connection
still wouldn't catch it. Granted, skipping the checksum on the local
link is an additional error source, but I suspect it's less of one than
a disk nearing its MTBF.
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