Re: [Gen-art] Gen-ART Last Call review of draft-ietf-dnsop-5966bis-04

[sara <[e-mail]>]

> On 2 Dec 2015, at 22:31, Brian E Carpenter <[e-mail]> wrote:
> 
> Hi Sara,
> 
>>> 
>>> Specifically:
>>> 
>>> "Section 6.1.3.2 of [RFC1123] states:
>>> 
>>>     DNS resolvers and recursive servers MUST support UDP, and SHOULD
>>>     support TCP, for sending (non-zone-transfer) queries."
>>> 
>>> Please make an explicit statement that this SHOULD is changed to MUST.
>> 
>> The bis reproduces 2 statements verbatim from RFC5966 with regard to this. In paragraph 4 of the Introduction: 
>> 
>> “This document therefore updates the core DNS protocol specifications
>>   such that support for TCP is henceforth a REQUIRED part of a full DNS
>>   protocol implementation."
>> 
>> and in the first sentence of Section 5
>> 
>> “All general-purpose DNS implementations MUST support both UDP and TCP transport.”
>> 
>> In light of this do you still think we need another statement to this effect?
> 
> Well, this may seem picky, but since you quote the text, I think that
> a clear statement that you are changing it is useful. IMHO, YMMV, of course.

The sentence is updated in 2 ways
- changing SHOULD to MUST and 
- the reference to using TCP just for zone transfers is also removed
which might be why it seemed easier to just restate it in RFC5966. 

Would it help if Section 5 was updated to read:

“ Section 6.1.3.2 of [RFC1123] is updated: All general-purpose DNS
  implementations MUST support both UDP and TCP transport.”

> 
> Adding the "Updates: 1035, 1123" is necessary, though.

Agreed, will update. 

Regards

Sara.