[core] constrained resources at root for debugging connectivity

Michael Richardson <mcr+ietf@sandelman.ca> Tue, 20 July 2021 13:39 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
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Date: Tue, 20 Jul 2021 09:39:09 -0400
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Subject: [core] constrained resources at root for debugging connectivity
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It was said in a private exchange:
    > There is no CoAP resource at the root /  hence the 4.04.  (Only the
    > MASA has a test HTTP resource at / )

I thought, what we need is a CoAP Ping/echo.
And I remembered:
  https://www.ietf.org/archive/id/draft-ietf-core-echo-request-tag-13.html#section-2.2

but, this is for the server to validate that the client is really there.

Should we recommend that Registrar put something at / that produces a 2.00?
(lowercase recommend)

--
Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 IøT consulting )
           Sandelman Software Works Inc, Ottawa and Worldwide