On Feb 7, 2019, at 9:16 AM, Tony Finch <[email protected]> wrote: > But in this scenario things soon go wrong, because RFC 2181 says the > NODATA reply replaces the delegation records in the resolver's cache. This > means that if a client explicitly asks for the NS records of a zone that > lacks them, resolution for other records in the zone will subsequently > fail.
Ah, there you have it. So then it _is_ required. Kevin’s point also points in that direction. Is there somewhere in a later spec where this is stated explicitly, then?
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