On Thu Jun 22 20:26:14 2017, muks wrote:
> RFC 2136 covers this:
> 
> 7.18. Previously existing names which are occluded by a new zone cut
> are still considered part of the parent zone, for the purposes of
> zone transfers, even though queries for such names will be referred
> to the new subzone's servers.  If a zone cut is removed, all parent
> zone names that were occluded by it will again become visible to
> queries.  (This is a clarification of [RFC1034].)
> 
> Occlusion is not an error. A similar situation can occur with DNAME
> too.
> 
> Mukund

Ah OK - in that case, I think there is nothing we can reasonable do here, unless we think it worthwhile to add a warning.

Cathy