[dns-operations] Enom's name server broken?

[Stephane Bortzmeyer]

On Wed, Jan 16, 2013 at 12:46:30AM +1100,
 Mark Andrews <marka at isc.org> wrote 
 a message of 126 lines which said:

> For clean transfers of zones from one provider to the next the
> losing provide should slave the zones from the new provider.  This
> ensures that caches only see current content regardless of whether
> they are talking to the new or old servers.

Note that it does not scale (think about the ACL to manage and the
need to have a timer) and, in practice, is never done (despite the
fact it is a contractual obligation for the .FR registrars and may be
for the ICANN ones).