On Thu, Aug 16, 2018 at 03:52:54PM -0700, Joe Touch wrote: > > > On Aug 16, 2018, at 3:10 PM, Benjamin Kaduk <ka...@mit.edu> wrote: > > >> Keepalives at a layer SHOULD NOT be interpreted as implying state at > >> any other layer. > > > > What's going on here in the last sentence is probably a bit subtle -- a > > keeaplive both does not indicate "real" protocol activity but also can > > serve to exercise the lower protocol layers (and, even, per the previous > > sentence, suppresses their keepalives). > > That may be intended but is never actually known. Lower layers can compress, > cache, merge, and otherwise change the effect a transmission st one layer has > on any other.
Right, that's why it's subtle :) -Benjamin > Protocols should avoid trying to do this. > > Joe
