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Re: [Idr] [Editorial Errata Reported] RFC4271 (6498)

Donald Eastlake <d3e3e3@gmail.com> Sat, 27 March 2021 22:59 UTC

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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Sat, 27 Mar 2021 18:58:43 -0400
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To: RFC Errata System <rfc-editor@rfc-editor.org>
Cc: Yakov Rekhter <yakov@juniper.net>, Tony Li <tony.li@tony.li>, skh@nexthop.com, Alvaro Retana <aretana.ietf@gmail.com>, "John G. Scudder" <jgs@juniper.net>, Martin Vigoureux <martin.vigoureux@nokia.com>, Jeffrey Haas <jhaas@pfrc.org>, Keyur Patel <keyur@arrcus.com>, Susan Hares <skh@ndzh.com>, "idr@ietf. org" <idr@ietf.org>, grahampaasch@gmail.com
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Subject: Re: [Idr] [Editorial Errata Reported] RFC4271 (6498)
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"SHALL" is the same as "MUST" or "REQUIRED" [RFC2119]. So if it MUST
be included, how can inclusion be discretionary?

Thanks,
Donald
===============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 2386 Panoramic Circle, Apopka, FL 32703 USA
 d3e3e3@gmail.com

On Sat, Mar 27, 2021 at 6:39 PM RFC Errata System
<rfc-editor@rfc-editor.org> wrote:
>
> The following errata report has been submitted for RFC4271,
> "A Border Gateway Protocol 4 (BGP-4)".
>
> --------------------------------------
> You may review the report below and at:
> https://www.rfc-editor.org/errata/eid6498
>
> --------------------------------------
> Type: Editorial
> Reported by: Graham Paasch <grahampaasch@gmail.com>
>
> Section: 5.1.5
>
> Original Text
> -------------
> LOCAL_PREF is a well-known attribute that SHALL be included in all UPDATE messages that a given BGP speaker sends to other internal peers.
>
> Corrected Text
> --------------
> LOCAL_PREF is a well-known discretionary attribute that SHALL be included in all UPDATE messages that a given BGP speaker sends to other internal peers.
>
> Notes
> -----
> It is unclear from the text to which of the four path attribute categories LOCAL_PREF belongs. There was even submitted an errata to create a fifth category for this attribute, but it is clear from the definition of the categories, that this attribute is well known discretionary. All routers must be capable of sending or receiving the LOCAL_PREF attribute, however it is up to a routers discretion whether to include that attribute in an UPDATE message.
>
> Instructions:
> -------------
> This erratum is currently posted as "Reported". If necessary, please
> use "Reply All" to discuss whether it should be verified or
> rejected. When a decision is reached, the verifying party
> can log in to change the status and edit the report, if necessary.
>
> --------------------------------------
> RFC4271 (draft-ietf-idr-bgp4-26)
> --------------------------------------
> Title               : A Border Gateway Protocol 4 (BGP-4)
> Publication Date    : January 2006
> Author(s)           : Y. Rekhter, Ed., T. Li, Ed., S. Hares, Ed.
> Category            : DRAFT STANDARD
> Source              : Inter-Domain Routing
> Area                : Routing
> Stream              : IETF
> Verifying Party     : IESG
>
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