BCP 38 coverage if top x providers ...

[fw at deneb.enyo.de (Florian Weimer)]

* Laurent Dumont:

> Wouldn't you want BCP38 policies to be as close as possible to the 
> traffic sources? Instead of creating more "fake" traffic?

Maybe as close as possible, but still without sacrificing source
network attribution is sufficient.

> And at the same time, partial filtering doesn't seem as a very
> effective way to fight spoofed traffic on a large scale.

That depends on the problems caused by spoofed traffic.  My hunch is
that non-policing networks emit a constant trickle of spoofed traffic
which does not cause any problems, and that traffic can be used to
detect lack of policing even without actual abuse of the spoofing
capability.