On 17/09/2018 08:43, Mukund Sivaraman wrote: > The suggestion is only to require support in resolvers going forward for > CNAME co-existing with other types for now. That should not break any > detail of how DNS is used today.
.... > Although it changes current DNS protocol, AFAICT there does not seem to > be anything badly wrong with allowing CNAME + other types at a node, > where the CNAME is considered a fallback when the required type doesn't > exist. This is not true. Ondrej demonstrated at the last hackathon that permitting a CNAME alongside the apex can cause MX-related failures in resolvers that are not upgraded. There are going to be presentations on this topic at the forthcoming DNS-OARC meeting in Amsterdam. Ray _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
