[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: CUD and FBD
Iljitsch van Beijnum wrote:
Rather than choose CUD or FBD and expect vendors to implement this
correctly, we can define the probing such that it gives implementers
maximum flexibility. This has the advantage that we don't have to spend
large amounts of brainpower coming up with the perfect solution before
there is operational experience, and that implementers can begin with
something simple and extend it later.
The idea is that we basically specify CUD as the basic approach. So
first of all, when there is no outgoing traffic, nothing happens. Also,
in the presence of positive ULP feedback nothing happens. When there is
outgoing traffic but no positive feedback, the shim layer periodically
sends out a probe. The other end sends back a reply when it sees the
probe.
Why can't we just pick FBD and be done with it?
It seems to do the same job as CUD, and doesn't cause extra packets when
the ULPs don't give any feedback.
Or am I missing some downside of FBD that makes it inappropriate as the
one and only way?
Erik