Re: [netmod] Comment on draft-clacla-netmod-yang-model-update-02
Ladislav Lhotka <lhotka@nic.cz> Wed, 15 November 2017 13:05 UTC
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From: Ladislav Lhotka <lhotka@nic.cz>
To: netmod@ietf.org
Date: Wed, 15 Nov 2017 21:06:35 +0800
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/NdyrkdPIBPfN5Ek7aZPlsBHq6bA>
Subject: Re: [netmod] Comment on draft-clacla-netmod-yang-model-update-02
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On Wed, 2017-11-15 at 12:17 +0100, Martin Bjorklund wrote: > Balazs Lengyel <balazs.lengyel@ericsson.com> wrote: > > The server MAY implement obsoleted nodes or MAY NOT. This may or may > > not is not good enough as a contract for the management client. My > > problem is that the current solution is just not good enough. IMHO we > > need to change it. > > Note that if a server implements version 1 of a module, and then the > module doesn't change, but the server in the next sw version drops > support for the module, the client will also be unhappy. We (the > IETF) can't have rules for these kinds of things. If the server drops support for a module, then that module has to disappear from YANG library, so it is a priori known that it happened. With deprecated/obsolete nodes, a server may drop their support without any notice, within the same module&revision. > > > Even after semver you can still obsolete the old stuff and provide the > > new stuff with a new name, although that might not be the common > > practice. Which is a good thing, as I believe it is sometimes better > > to correct existing definitions then to replace them. > > But you still want to require servers to implement even obsolete > nodes? I think with semver support there will be no need for the "status" statement - the nodes just get removed and version number bumped. Lada > > > /martin > > > > > > regards Balazs > > > > > > On 2017-11-15 16:53, Martin Bjorklund wrote: > > > Exactly. With the current solution, the sever can still implement the > > > deprecated or obsolete nodes in order to support old clients. > > > > > > With a MAJOR update in a semver world, it means that the old nodes are > > > removed (or rather, possibly, that the old nodes have new syntax > > > and/or semantics). > > > > > > > > > > > > > -- > > Balazs Lengyel Ericsson Hungary Ltd. > > Senior Specialist > > Mobile: +36-70-330-7909 email: Balazs.Lengyel@ericsson.com > > > > _______________________________________________ > netmod mailing list > netmod@ietf.org > https://www.ietf.org/mailman/listinfo/netmod -- Ladislav Lhotka Head, CZ.NIC Labs PGP Key ID: 0xB8F92B08A9F76C67
- [netmod] Comment on draft-clacla-netmod-yang-mode… Balazs Lengyel
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Juergen Schoenwaelder
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Andy Bierman
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Balazs Lengyel
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Juergen Schoenwaelder
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Juergen Schoenwaelder
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Martin Bjorklund
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Ladislav Lhotka
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Martin Bjorklund
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Ladislav Lhotka
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Joe Clarke
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Martin Bjorklund
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Balazs Lengyel
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Balazs Lengyel
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Ladislav Lhotka
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Joe Clarke
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Balazs Lengyel
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Joe Clarke
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Juergen Schoenwaelder
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Joe Clarke
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Ladislav Lhotka
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Ladislav Lhotka
- [netmod] Obsolete and deprecated in RFC 7950 Balazs Lengyel
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Martin Bjorklund
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Ladislav Lhotka
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Martin Bjorklund
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Balazs Lengyel
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Randy Presuhn
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Ladislav Lhotka
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Ladislav Lhotka
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Balazs Lengyel
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Ladislav Lhotka
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Joe Clarke
- Re: [netmod] Comment on draft-clacla-netmod-yang-… Ladislav Lhotka