Re: [netconf] Benjamin Kaduk's Discuss on draft-ietf-netconf-yang-push-23: (with DISCUSS and COMMENT)
"Eric Voit (evoit)" <evoit@cisco.com> Wed, 15 May 2019 19:24 UTC
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From: "Eric Voit (evoit)" <evoit@cisco.com>
To: Alexander Clemm <ludwig@clemm.org>, 'Benjamin Kaduk' <kaduk@mit.edu>
CC: 'The IESG' <iesg@ietf.org>, "netconf@ietf.org" <netconf@ietf.org>, "draft-ietf-netconf-yang-push@ietf.org" <draft-ietf-netconf-yang-push@ietf.org>, "netconf-chairs@ietf.org" <netconf-chairs@ietf.org>
Thread-Topic: [netconf] Benjamin Kaduk's Discuss on draft-ietf-netconf-yang-push-23: (with DISCUSS and COMMENT)
Thread-Index: AQJ3PF2dFB47j2Iq/ZH31Feu7eo0twH9HjRjAiM3vTWlBxuWYIAADRrQ
Date: Wed, 15 May 2019 19:24:25 +0000
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Subject: Re: [netconf] Benjamin Kaduk's Discuss on draft-ietf-netconf-yang-push-23: (with DISCUSS and COMMENT)
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> From: Alexander Clemm, May 15, 2019 2:59 PM > <snip> > > Section 3.3 states: > > > > In order for a subscriber to determine whether objects > > support on-change subscriptions, objects are marked accordingly on a > > publisher. Accordingly, when subscribing, it is the responsibility > > of the subscriber to ensure it is aware of which objects support on- > > change and which do not. For more on how objects are so marked, see > > Section 3.10. > > > > Chasing the reference, we see that this marking is left for future > > work or implementation-specific usage. I'm not very comfortable with > > the way we are describing this situation, as it seems pretty fragile > > in the face of different implementations trying to interoperate. > > > > <ALEX> The working group decided to pull this item out of this draft. > > It is being addressed in draft-ietf-netconf-notification-capabilities > > (https://datatracker.ietf.org/doc/draft-ietf-netconf-notification-capa > > biliti > > es/) </ALEX> > > I guess I'll see what the -24 looks like, but I'm not sure yet whether "pull this > item out of the draft" is describing a previous decision that left it in this state or > a current decision starting from this state. (The latter would seem to make > more sense to me, but I can wait and see.) > > <ALEX2> To give a bit of history, in a set of earlier revisions we did describe a > mechanism for this. There was quite a bit of discussion around this and various > options were considered, from introducing a YANG extension (see e.g. rev 12 > section 3.10) to the mechanism that is now described in the separate draft. > There were also discussions whether such mechanism should be generalized > further - for example, what if you wanted to express not only whether an item > supports on-change subscriptions, but wants to give an indication of the "size" > of the change? The WG ultimately decided to not overburden the draft and slow > progress down further and address this item separately. There was also at some > point discussion about keeping it simpler and take an all-or-nothing approach > (require a server to either support on-change for all objects or none), which > however was deemed to be too restrictive and we did want to allow for the > possibility of a differentiated approach. > Bottom line, I would like to ask please accept the previous decision. > </ALEX2> To summarize how this played out in the WG - there was a section dedicated to the solution within YANG push - several WG members asked extract this solution in order to postpone finalization of the solution - we extracted the section at the WG request - a new draft with the solution was adopted by the WG. See draft-ietf-netconf-notification-capabilities - implementers would be wise to use this draft To get a brief glimpse on some of the details in the discussion history, you can look at https://github.com/netconf-wg/yang-push/issues/10 There was also quite a bit on the mailing list. Thanks, Eric
- [netconf] Benjamin Kaduk's Discuss on draft-ietf-… Benjamin Kaduk via Datatracker
- Re: [netconf] Benjamin Kaduk's Discuss on draft-i… Alexander Clemm
- Re: [netconf] Benjamin Kaduk's Discuss on draft-i… Benjamin Kaduk
- Re: [netconf] Benjamin Kaduk's Discuss on draft-i… Alexander Clemm
- Re: [netconf] Benjamin Kaduk's Discuss on draft-i… Eric Voit (evoit)
- Re: [netconf] Benjamin Kaduk's Discuss on draft-i… Alexander Clemm