[dns-operations] Questions on DNS Flag day 2020 proposal

Lee ler762 at gmail.com
Wed Jul 3 16:01:32 UTC 2019

On 7/3/19, Jerry Lundström <jerry at dns-oarc.net> wrote:
> Hi Davey,
> On 7/3/19 9:49 AM, Davey Song wrote:
>> 1) In the Q&A part of index.md, under the question "Q: Will this Flag Day
>> require a software update?",
>> it is said "DNS software which follows published standards does not
>> require
>> upgrade" . It will give people a
>> impression that nothing should be done by the operators. Actually,
>> operators should change the configuration
>> of default EDNS buffer size (~1220). I suggest an addtional note should
>> be
>> made on this question.
> Well, the question was specifically about software update, not
> configure. And, if you ask me, there is plenty of mentioning about
> configure change in the text.
> Is this a language thing maybe? I have never heard anyone say "software
> update" and meant a configure change.

I agree with Davey Song; the FAQ needs to be expanded.  Starting with

Q: What is the 2020 DNS Flag Day?

I'm still not sure what "problems with IP fragmentation of DNS
packets" means.  Is there a problem with fragmenting TCP that's
addressed by this flag day or is this just about not fragmenting UDP
and requiring falling back to TCP?

followed by
Q: Will this Flag Day require a DNS software update?
Q: Will this Flag Day require DNS configuration changes?
Q: Will this Flag Day require firewall changes?


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