Re: [core] [Ext] Re: Lars Eggert's Discuss on draft-ietf-core-sid-22: (with DISCUSS and COMMENT)

[Amanda Baber <[e-mail]>]

Hi,

[AB] below. About the IANA-maintained YANG modules like iana-if-type and iana-routing-types:

On 10/26/23, 2:53 PM, "iesg on behalf of Michael Richardson" <[e-mail] on behalf of [e-mail]> wrote:

    Lars Eggert via Datatracker <[e-mail]> wrote:
        > ### Section 6.5.3, paragraph 3
        > ```
        > After Working Group Adoption, any modification of a ".sid" file is
        > expected to be discussed on the mailing list of the appropriate
        > Working Groups.  Specific attention should be paid to implementers'
        > opinion after Working Group Last Call if a SID value is to change its
        > meaning.  In all cases, a ".sid" file and the SIDs associated with it
        > are subject to change before the publication of an internet draft as
        > an RFC.
        > ```
        > So IANA is not only hosting immutable files, they are also supposed to
        > support (frequent?) changes if these files. Unsure if IANA is set up
        > for this.

    The updates are likely not more frequent than issuing new RFCs.

    There is a class of YANG module which are IANA maintained, and which usually
    are "backed" (converted from) IANA maintained registries.  So those could be
    updated more often, based upon the IANA Considerations for those registries.

[AB] With a couple of exceptions, IANA uploads the revised registry and the updated YANG module simultaneously. Assuming that we already had a SID file in place for that registry/YANG, would we need to wait to make those updates until the experts could provide an updated SID file, or could the new SID follow later? It looks like IANA-maintained YANGs as a whole are updated on the order of 5x/year, mostly on an Expert Review or FCFS basis. (We've been asked to hold YANG-updating registrations until publication when they're made by an RFC. IIRC the reasoning was that otherwise we would need to update the module again in order to update the reference field when an RFC number was assigned.)   

Thanks,
Amanda