[dns-operations] FlagDay 2020 UDP Size

Paul Vixie paul at redbarn.org
Mon Aug 3 18:44:37 UTC 2020

On Monday, 3 August 2020 17:20:30 UTC jack tavares wrote:
> I am asking for a clarification on the recommended default settings for
> Resolvers etc.
> I understand that the default setting should be 1232.

that's been proposed, and contested.

> But what is not clearly laid out, in my opinion, is if;
> a client sends a larger EDNS buffer size, what should the resolver do?
> Currently the resolvers i work with have a max of 4096 by default, and will
> respect a LOWER limit
> from a client, but cap the response at 4k.
> Is it ok to go higher, if we set the default at 4k?

see also:



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