Re: [bess] [Technical Errata Reported] RFC9252 (7817)

Ketan Talaulikar <ketant.ietf@gmail.com> Thu, 21 March 2024 02:13 UTC

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From: Ketan Talaulikar <ketant.ietf@gmail.com>
Date: Thu, 21 Mar 2024 07:43:14 +0530
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Subject: Re: [bess] [Technical Errata Reported] RFC9252 (7817)
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Top posting for the attention of our new AD :-)


On Tue, Feb 20, 2024 at 10:18 PM RFC Errata System <
rfc-editor@rfc-editor.org> wrote:

> The following errata report has been submitted for RFC9252,
> "BGP Overlay Services Based on Segment Routing over IPv6 (SRv6)".
>
> --------------------------------------
> You may review the report below and at:
> https://www.rfc-editor.org/errata/eid7817
>
> --------------------------------------
> Type: Technical
> Reported by: Ketan Talaulikar <ketant.ietf@gmail.com>
>
> Section: 3.2.1
>
> Original Text
> -------------
>    As defined in [RFC8986], the sum of the Locator Block Length (LBL),
>    Locator Node Length (LNL), Function Length (FL), and Argument Length
>    (AL) fields MUST be less than or equal to 128 and greater than the
>    sum of Transposition Offset and Transposition Length.
>
> Corrected Text
> --------------
>    As defined in [RFC8986], the sum of the Locator Block Length (LBL),
>    Locator Node Length (LNL), Function Length (FL), and Argument Length
>    (AL) fields MUST be less than or equal to 128 and greater than or
>    equal to the sum of Transposition Offset and Transposition Length.
>
> Notes
> -----
> The sum of Trans Off and Trans Length can be equal to the LBL+LNL+FL+AL
> when the last part of the SID (function or argument) is getting transposed.
>
> This is clear also from the example below in the next paragraph of the
> same section:
>
>    As an example, consider that the sum of the Locator Block and the
>    Locator Node parts is 64.  For an SRv6 SID where the entire Function
>    part of size 16 bits is transposed, the transposition offset is set
>    to 64 and the transposition length is set to 16.  While for an SRv6
>    SID for which the FL is 24 bits and only the lower order 20 bits are
>    transposed (e.g., due to the limit of the MPLS Label field size), the
>    transposition offset is set to 68 and the transposition length is set
>    to 20.
>
> Instructions:
> -------------
> This erratum is currently posted as "Reported". (If it is spam, it
> will be removed shortly by the RFC Production Center.) Please
> use "Reply All" to discuss whether it should be verified or
> rejected. When a decision is reached, the verifying party
> will log in to change the status and edit the report, if necessary.
>
> --------------------------------------
> RFC9252 (draft-ietf-bess-srv6-services-15)
> --------------------------------------
> Title               : BGP Overlay Services Based on Segment Routing over
> IPv6 (SRv6)
> Publication Date    : July 2022
> Author(s)           : G. Dawra, Ed., K. Talaulikar, Ed., R. Raszuk, B.
> Decraene, S. Zhuang, J. Rabadan
> Category            : PROPOSED STANDARD
> Source              : BGP Enabled ServiceS
> Area                : Routing
> Stream              : IETF
> Verifying Party     : IESG
>

[bess] [Technical Errata Reported] RFC9252 (7817) RFC Errata System
Re: [bess] [Technical Errata Reported] RFC9252 (7… Ketan Talaulikar