Same thing applies for WiFi - oftentimes WiFi with poor signal levels
will cause drops, without congestion. This is something I'm working to
fix from the WiFi / L2 side. What are the solutions in L3? Some kind of
hybrid delay & drop based CC?
Simon
On 4/23/2015 8:52 AM, Jonathan Morton wrote:
> By curiosity, what is now responsible for the drops if not the
congestion?
I think the point was not that observed drops are not caused by
congestion, but that congestion doesn't reliably cause drops.
Correlation is not causation.
There are also cases when drops are in fact caused by something other
than congestion, including faulty ADSL phone lines. Some local loop
providers have been known to explicitly consider several percent of
packet loss due to line conditions as "not a fault", to the
consternation of the actual ISP who was trying to provide a decent
device over it.
- Jonathan Morton
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