Re: [Netconf] Benjamin Kaduk's Discuss on draft-ietf-netconf-zerotouch-25: (with DISCUSS and COMMENT)

Kent Watsen <kwatsen@juniper.net> Wed, 09 January 2019 21:12 UTC

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From: Kent Watsen <kwatsen@juniper.net>
To: Dave Crocker <dcrocker@bbiw.net>, Adam Roach <adam@nostrum.com>, Alexey Melnikov <aamelnikov@fastmail.fm>
CC: The IESG <iesg@ietf.org>, "draft-ietf-netconf-zerotouch@ietf.org" <draft-ietf-netconf-zerotouch@ietf.org>, "netconf-chairs@ietf.org" <netconf-chairs@ietf.org>, "netconf@ietf.org" <netconf@ietf.org>, Benjamin Kaduk <kaduk@mit.edu>
Thread-Topic: Benjamin Kaduk's Discuss on draft-ietf-netconf-zerotouch-25: (with DISCUSS and COMMENT)
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Date: Wed, 9 Jan 2019 21:12:06 +0000
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Subject: Re: [Netconf] Benjamin Kaduk's Discuss on draft-ietf-netconf-zerotouch-25: (with DISCUSS and COMMENT)
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Hi Dave,

Thanks for your prompt reply and, yeah, sometimes the IETF-aliases are wonky.

Your response makes sense to me, but it immediately conjured the question of *why* is _sztp under _tcp, for this case?  This question isn't specifically to you, though your input would be appereciated.

To clarify, the draft uses DNS in two ways:

1) the first is for traditional SRV records, for which being under _tcp makes sense.

2) the second is for TXT records that, of and in themselves, are not describing a TCP service, so much as providing bootstrapping data, that may or may not cause the device to initiate a subsequent connection (TCP or otherwise).   For this case, we also have the _sztp record under _tcp, but *should* it be under the TLD instead?

Does anyone else have an option?  If none, than we'll assume the current is good enough.

Thanks,
Kent



-----Original Message-----
From: Dave Crocker <dcrocker@bbiw.net>;
Date: Wednesday, January 9, 2019 at 3:54 PM
To: Kent Watsen <kwatsen@juniper.net>;, Adam Roach <adam@nostrum.com>;, Alexey Melnikov <aamelnikov@fastmail.fm>;
Cc: The IESG <iesg@ietf.org>;, "draft-ietf-netconf-zerotouch@ietf.org"; <draft-ietf-netconf-zerotouch@ietf.org>;, "netconf-chairs@ietf.org"; <netconf-chairs@ietf.org>;, NETCONF Working Group <netconf@ietf.org>;, Benjamin Kaduk <kaduk@mit.edu>;
Subject: Re: Benjamin Kaduk's Discuss on draft-ietf-netconf-zerotouch-25: (with DISCUSS and COMMENT)

On 1/9/2019 12:06 PM, Kent Watsen wrote:
> Gentle reminder to Dave, Alexey, and Adam wrt draft-ietf-dnsop-attrleaf.


While I see that the original note includes an address for attrleaf, I 
can't find a copy of the message in my own archive.  So it's good you 
sent the reminder.


> From: Kent Watsen <kwatsen@juniper.net>;
> Date: Monday, January 7, 2019 at 4:13 PM
...
> Hi Dave,
> 
>    Could you please search for "draft-ietf-dnsop-attrleaf" in this thread,
>    which regards this Section 4.2 of the zerotouch draft [1], and provide
>    your opinion?  In particular, since _sztp is under _tcp, does that mean
>    that it is not a globally scoped entry?
>   
>    [1] https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dietf-2Dnetconf-2Dzerotouch-2D27-23section-2D4.2&d=DwICaQ&c=HAkYuh63rsuhr6Scbfh0UjBXeMK-ndb3voDTXcWzoCI&r=9zkP0xnJUvZGJ9EPoOH7Yhqn2gsBYaGTvjISlaJdcZo&m=ClpsoYlkzVsJPxG2UmqaoE9oty_meAJY0WsZ6iMoXug&s=sSjLzUmLXf7IqaubCPlMV1hgf7AyKEh9Afqc6M51Ks0&e=


I believe your analysis is correct.

In the names your draft uses, _tcp is the global scoped name, relevant 
to attrleaf, while _sztp is subordinate and therefore not relevant to 
attrleaf.

d/


-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net