Re: [netconf] WGLC: draft-ietf-netconf-https-notif-06

"Eric Voit (evoit)" <evoit@cisco.com> Fri, 19 February 2021 17:42 UTC

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From: "Eric Voit (evoit)" <evoit@cisco.com>
To: Kent Watsen <kent@watsen.net>, "Eric Voit (evoit)" <evoit=40cisco.com@dmarc.ietf.org>
CC: "netconf@ietf.org" <netconf@ietf.org>, "draft-ietf-netconf-https-notif@ietf.org" <draft-ietf-netconf-https-notif@ietf.org>
Thread-Topic: [netconf] WGLC: draft-ietf-netconf-https-notif-06
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Subject: Re: [netconf] WGLC: draft-ietf-netconf-https-notif-06
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Hi Kent and Mahesh,

> Hi Eric,
> 
> > The majority of examples showing <subscription-started> have been removed.
> > The last place where they are discussed in -07 is the end of Section 2.   I
> > still feel that describing the coverage or non-coverage of the set of
> > subscription state change notifications within a stream of event
> > provides a useful context.
> 
> We’re unclear why this document should need or want to repeat what is defined
> in another RFC.  This document regards how to send notifications, regardless
> where they are defined.
> 
> As you note, Section 2 currently has the following statement:
> 
>       Note that, for RFC 8639 configured subscriptions, the very first
>       notification must be the "subscription-started" notification.</t>
> 
> Perhaps we should remove this sentence too, or replace “must” with “would”,
> so it doesn’t should normative?   Please advise.

The intent of my comment was mainly to assist the understandability between drafts.   Subscription state change notifications are a part of RFC8639.  This draft's Section 1.1 Applicability statement *totally appropriately* notes that only a subset of RFC8639 constructs are applicable.  As a result subscription state change notifications are not required when leveraging this specification.  

If there is a minimum set of subscription state change notifications required or desired, it would be good to list them.   I suspect there are not (as per the Applicability Statement).  Based on this, I believe it be worth listing some implications of not having the subscription state change notifications in the Security Considerations section.  E.g., not sending a <subscription-modified> might mean a receiver can't be sure that a compliant publisher is sending the full set of events expected.   Such a statement would make it easily apparent to an implementer of the differences in functionality delivered as they choose which RFCs to support.

Eric
 
> Thanks,
> Kent and Mahesh
> 
> 
> 
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