Thank you Kevin and Tony! We (as developers in our office) all have had gut feeling that NS is mandatory but we could not find it in the RFCs.
Thank you for your time! Petr Špaček @ CZ.NIC On 07. 02. 19 14:53, Kevin Darcy wrote: > The "apex" terminology didn't come into vogue until later. Prior to > that, people talked about the "top" of a zone. > > RFC 1034 Section 4.2.1 lays this out: > > "In the data that makes up a zone, NS RRs are found at the top node of > the zone (and are authoritative)". > > Admittedly "are found" doesn't sound to modern ears (or look to modern > eyes) like a mandatory requirement. That's another thing that's changed > over the years: RFC 2026 was yet to be published, which tightened up the > requirement levels and how to signal them textually. When looking at > pre-RFC-2026 RFC's, one has to exercise some judgement of whether > verbiage describing "typical" or "normal" situations is actually > normative, perhaps even mandatory.. > > > - Kevin > > On Thu, Feb 7, 2019 at 7:16 AM Petr Špaček <[email protected] > <mailto:[email protected]>> wrote: > > Hello dnsop, > > here is a quiz for experienced RFC archeologists: > > https://tools.ietf.org/html/rfc1035#section-5.2 > section 5.2. Use of master files to define zones > does not mention NS at apex at all, but it does explicitly mention SOA > at apex. Can it be interpreted as if NS at apex is not mandatory? > > Funnily enough > https://tools.ietf.org/html/rfc1035#section-5.3 > has an example which as NS at apex, but it is not clear from the > text above.. > > Is it mandatory or not? Should I submit erratum for RFC 1035? > > Thank you for clarification. > > -- > Petr Špaček @ CZ.NIC > > _______________________________________________ > DNSOP mailing list > [email protected] <mailto:[email protected]> > https://www.ietf.org/mailman/listinfo/dnsop > > > _______________________________________________ > DNSOP mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/dnsop _______________________________________________ DNSOP mailing list [email protected] https://www.ietf.org/mailman/listinfo/dnsop
