[Gen-art] Genart last call review of draft-ietf-core-echo-request-tag-11

Ines Robles via Datatracker <noreply@ietf.org> Wed, 02 December 2020 18:16 UTC

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Subject: [Gen-art] Genart last call review of draft-ietf-core-echo-request-tag-11
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Reviewer: Ines Robles
Review result: Ready with Nits

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at


Document: draft-ietf-core-echo-request-tag-11
Reviewer: Ines Robles
Review Date: 2020-12-02
IETF LC End Date: 2020-12-02
IESG Telechat date: Not scheduled for a telechat


This document specifies the Echo option that enables a CoAP server to verify
the freshness of a request or to force a client to demonstrate reachability at
its claimed network address, and specifies also the Request-Tag that allows the
CoAP server to match block-wise message fragments belonging to the same
request. Also, this document updates RFC7252 with respect to the client Token
processing requirements.

The document is well written, I have some minor questions/comments below.

Major issues: None.

Minor issues: None.

Nits/editorial comments:

1.- It would be nice to have the definition of Freshness into the terminology

2.- Figure 1 and Figure 4 have two columns named "U" (Unsafe), is that Ok?, or
should one of these columns be deleted/renamed?

3- Page 26: Please expand IV.

Thank you for this document,