DNS problems to RoadRunner - tcp vs udp

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

* Sean Donelan:

> Any network with a large user population probably should have separate
> DNS servers for their authoritative zones answering the Internet
> at-large and their recursive resolvers serving their user population.

It's not so much a question of network size.  You absolutely must use
different views if you host DNS for customer domains because there is a
race conidtion in the delegation provisioning protocol used by most TLDs
(you need to add the domain before you receive the delegation).