FWIW, Fred's retelling of the trail of tears for ICMP Source Quench (as the
concept moved from "please do this" to "please don't do this") is also
useful, but
From a "building a service" perspective, an optional communication is one
I can't rely on receiving, which means that I also have to have some
other solution to the problem, which may in turn be adequate in the
absence of the optional service.
is, I think, his most important point.
This was the most critical comment when we were looking at advisory
notifications in TRIGTRAN (also trying to "help" with congestion avoidance,
but if you can't count on receiving the notifications, you're most likely to
fail when there's congestion, and that's exactly the time you need to be
most likely to succeed).
Thanks,
Spencer
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