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Re: [Ace] Early media-type registration for EST over CoAP

Michael Richardson <mcr+ietf@sandelman.ca> Thu, 17 May 2018 01:39 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Hannes Tschofenig <Hannes.Tschofenig@arm.com>
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Comments: In-reply-to Hannes Tschofenig <Hannes.Tschofenig@arm.com> message dated "Wed, 16 May 2018 12:49:06 -0000."
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Date: Wed, 16 May 2018 21:39:03 -0400
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Subject: Re: [Ace] Early media-type registration for EST over CoAP
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Hannes Tschofenig <Hannes.Tschofenig@arm.com> wrote:
    > I don't have a strong opinion about option #2 appears to be slightly
    > better.

Oh, I misread your options before.

Hannes Tschofenig <Hannes.Tschofenig@arm.com> wrote:
    >> (RTT for the lookup vs extra bytes in the URL)
    >> Are you asking me about these two options:
    >> Option #1 - going through /.well-known/core
    >> REQ: GET /.well-known/core?rt=ace.est
    >> RES: 2.05 Content </est-root >; rt="ace.est"


    >> Option #2 - using a /.well-known/est URL
    >> REQ: GET /.well-known/est
    >> RES: 2.05 Content </est-root>; rt="ace.est"

Option 2 is not substituting /.well-known/core for /.well-known/est
(and doing resource discovery and then learn one uses /est-root/rv, etc.)
but rather not doing resource discovery, just go directly
to /.well-known/est/rv, which is what we do in RFC7030.

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-

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