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

RFC Errata System <rfc-editor@rfc-editor.org> Tue, 20 February 2024 16:49 UTC

To: gdawra.ietf@gmail.com, ketant.ietf@gmail.com, robert@raszuk.net, bruno.decraene@orange.com, zhuangshunwan@huawei.com, jorge.rabadan@nokia.com, aretana.ietf@gmail.com, jgs@juniper.net, andrew-ietf@liquid.tech, matthew.bocci@nokia.com, slitkows.ietf@gmail.com, zzhang@juniper.net
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Date: Tue, 20 Feb 2024 08:48:57 -0800
Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/QRbdssWNeCKVXolkBRd11GNJuh8>
Subject: [bess] [Technical Errata Reported] RFC9252 (7817)
Precedence: list

The following errata report has been submitted for RFC9252,
"BGP Overlay Services Based on Segment Routing over IPv6 (SRv6)".

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You may review the report below and at:
https://www.rfc-editor.org/errata/eid7817

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Type: Technical
Reported by: Ketan Talaulikar <ketant.ietf@gmail.com>

Section: 3.2.1

Original Text
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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
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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:
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RFC9252 (draft-ietf-bess-srv6-services-15)
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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