Spinning only works if both endpoints participate. One endpoint must reflect the bit and the other must flip it every round trip.
> On 7 Jan 2021, at 06.03, Martin Thomson <[email protected]> wrote: > >> 1) I find it hard to understand why a server is allowed to independently >> decide >> whether or not to support the spin bit on a connection? Shouldn't the client >> (or administrator of the client system) that opened the connection be able to >> choose whether they want the RTT to be monitorable via the spin bit? What is >> the reasoning for allowing the server (or server administrator) to be able to >> independently be able to decide what is best for the client? > > The consensus of the working group is that active spinning must be made > independently by either endpoint and that having an endpoint dictate the > actions of its peer for this feature was not desirable. Hence the design as > documented.
