Your comments seem to differentiate IP4 vs IP6, but I don't
believe that
is relevant to the issue of an ISP throttling or breaking
specific
applications. If you have evidence that UDP on IP4 is
treated
differently than UDP on IP6 by your provider, without
further
information I would suspect that this is simply an
unintentional over
sight on their part.
This is your misunderstanding. The protections
are to drop ipv4 udp because that is where the ddos / iot
trash is , not v6.... for now
Perhaps the attention you've generated on this topic, along
with the
adoption of additional UDP based applications like QUIC,
will encourage
ISPs to treat UDP in a more neutral manner and not simply
see UDP as
something that is "bad".
Dropping udp is not from a “best practice” doc
from a vendor, it is deployed by network ops folks that are
trying to sleep at night.