[dns-wg] Re: DNS propagation inconsistencies across European resolvers — observations and data

Vahid Shaik writes:

Has anyone else on the list observed ISP resolvers in the RIPE region enforcing minimum TTL values? RFC 8767 (Serving Stale Data) seems related, but I'm curious whether this is intentional policy or just aggressive caching implementations.

Highly unlikely to be 8767-related. Serve Stale is intended for exceptional circumstances, when a resolver has tried to refresh expired data but failed to. Cache Minimum TTLs are a different matter.