Re: [core] Robert Wilton's Discuss on draft-ietf-core-sid-16: (with DISCUSS and COMMENT)
Michael Richardson <mcr+ietf@sandelman.ca> Tue, 13 July 2021 17:38 UTC
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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Robert Wilton <rwilton@cisco.com>, The IESG <iesg@ietf.org>, draft-ietf-core-sid@ietf.org, core-chairs@ietf.org, core@ietf.org
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Date: Tue, 13 Jul 2021 13:38:33 -0400
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Archived-At: <https://mailarchive.ietf.org/arch/msg/core/v180xd1pSVbkS2wokWpU0G5AQ1Q>
Subject: Re: [core] Robert Wilton's Discuss on draft-ietf-core-sid-16: (with DISCUSS and COMMENT)
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Robert Wilton via Datatracker <noreply@ietf.org> wrote: > (1) I would like further discussion regarding whether SIDs are bound just to > the schema name, or the schema item definition. I'm not sure I understand the question.... I guess schema name is the leaf definition. > The draft states that if the > definition is changed in a non-backwards-compatible (NBC) way then a new SID > SHOULD be allocated. True, I assume that this leads to a new YANG leaf name. > But I don't understand how this will work. Given that > the .sid file would then contain exactly the same path but with different sids > assigned (for every time the meaning of the definition changes), then how do > consumers of the sid file know which sid to use for a given path (given that > there is no indication in the .sid file)? Instead, I think that this is the > wrong way to be handling NBC changes, and SIDs should be bound only to the > schema path (i.e., the name of the item), and a new SID is only allocated if > the name/path changes, and otherwise the same SID is used, even if the > definition changes in a non-backwards-compatible way. This is my understanding. > (3) This draft makes use of the rc:yang-data extension. Was there any > discussion about using "YANG Data Structure Extensions" (RFC 8791) instead, > which is meant to be a cleaner formulation of the rc:yang-data extension, and > without the dependency on RESTCONF? I would suggest that using RFC 8791 would > be preferable if possible. I don't know of any such discussion, but I don't really understand the distinction. > (4) The policy in 7.4.2 for allocation a SID mega-range seems to aiming this > towards organizations rather than individuals. Yes, the idea being that "Zigbee" or "IEEE" or ... would allocate a mega-range. > The policy in 7.6 for the "IETF > YANG SID Registry" requires an RFC. What is the mechanism if an individual or > open source project wanted to get SIDs assigned for some of their YANG modules? > I.e., should we be defining a separate mega-range, managed by IANA, with just > Expert Review or Specification Required so that these modules could use SIDs > allocated? Or do you envisage a separate entity taking up the responsibility > for coordinating this? My impression was that there would be a mega-range operated outside of IANA for this (open source, non-RFC YANG module) kind of thing, but I think that the energy for doing that may have waned. -- ] Never tell me the odds! | ipv6 mesh networks [ ] Michael Richardson, Sandelman Software Works | IoT architect [ ] mcr@sandelman.ca http://www.sandelman.ca/ | ruby on rails [ -- Michael Richardson <mcr+IETF@sandelman.ca> . o O ( IPv6 IøT consulting ) Sandelman Software Works Inc, Ottawa and Worldwide
- [core] Robert Wilton's Discuss on draft-ietf-core… Robert Wilton via Datatracker
- Re: [core] Robert Wilton's Discuss on draft-ietf-… Michael Richardson
- Re: [core] Robert Wilton's Discuss on draft-ietf-… Rob Wilton (rwilton)
- Re: [core] Robert Wilton's Discuss on draft-ietf-… Michael Richardson
- Re: [core] Robert Wilton's Discuss on draft-ietf-… Andy Bierman
- Re: [core] Robert Wilton's Discuss on draft-ietf-… Rob Wilton (rwilton)
- Re: [core] Robert Wilton's Discuss on draft-ietf-… Carsten Bormann
- Re: [core] Robert Wilton's Discuss on draft-ietf-… Rob Wilton (rwilton)