[Idr] draft-ietf-idr-segment-routing-te-policy-17.txt

Susan Hares <shares@ndzh.com> Fri, 10 June 2022 20:24 UTC

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From: Susan Hares <shares@ndzh.com>
To: "idr@ietf.org" <idr@ietf.org>
CC: "draft-ietf-idr-segment-routing-te-policy@ietf.org" <draft-ietf-idr-segment-routing-te-policy@ietf.org>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "Dongjie (Jimmy)" <jie.dong@huawei.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/OYK4BBzaanYVb4MCJXUL3jVI1Tg>
Subject: [Idr] draft-ietf-idr-segment-routing-te-policy-17.txt
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Stefano, Clarence, Ketan, Paul, Dhanendra and Steven:

Thank  you for your continued support in standardizing this specification.

My latest shepherd's report is based on -17.txt.
It has 3 parts: implementation report issues, technical issues, and editorial nits.
Please let me know if you have any questions.

As always, I welcome the opportunity to chat with one or all of the authors to
quickly resolve any issues.

Sue Hares

Implementation report issues
----------------------------------------
https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-segment-routing-te-policy%20implementations%20

According to this implementations report, we do not have any implementations that support:
TLV 15, 20, 129, and 130 in the following report:

https://trac.ietf.org/trac/idr/wiki/draft-ietf-idr-segment-routing-te-policy%20implementations%20

The following is missing from the basic implementation report:
1) Is Error handling in section 5 is included in the base support?
2) What Segment type SubTLVs (Segment type A-K) have been implemented in these implementations?

After you provide these details, I will query the IDR WG to determine if the
IDR finds this level of support sufficient to pass the document as is to the IESG.

Technical issues (Shepherd's report)
=====================================
1) Color Extended community (section 3)
Level of Issue: small if NLRIs with SAFI 73 (AFI=1/SAFI=73, AFI=2/SAFI=73)

The Color Extended community specifies setting the bit flags in the Color Extended Community [RFC9012] section 4.3.  However, you are specifying setting the flag bits which RFC9012 specifies you must set to zero.

Are you defining the color Extended Community only for the AFI/SAFI pairs defined in this document?

AFI=1/SAFI=73, AFI=2, SAFI=73

If so, please add to the text of section 3 (and sprinkle in where appropriate in the RFC)
that these additions to the Color Extended Community are specific to these
NLRI (AFI=1/SAFI=2).

If not, please explain carefully which NLRI (AFI/SAFI pairs) your
Additions to Extended Community apply to.

2)  Technical issue (sections 2.4.4.1, 2.4.4.2, 2.4.4.9, 2.4.4.10, and 2.4.4.11
Level: Small  - just needs tightening the text

The following ranges need to be specified:
a) weight value - give range or indicate any bit pattern [section 2.4.4.1),
b) section 2.4.4.2.2 (segment B)
Old/length is variable/
New/length is variable (18 if SRv6 Endpoint and SID structure field is not included, 24 if the field is included). /

Note: You may modify wording if the length values are specified.

Please make similar  changes to specify valid lengths in section 2.4.4.9 (segment I) and
Section 2.4.4.2.10 (Segment J) and  the ranges of valid lengths in 2.4.4.11 (segment K).



Editorial nits:
1) abstract -
Old text:/This document defines a new BGP SAFI with a new NLRI/

Question:  Since you are defining this with two pairs (AFI=1/SAFI=73, AFI=2, SAFI=73),
IMHO, this is two NLRI formats.  It is a small point, but this editorial nit
Is sprinkled across all the pages.

2) section 1 paragraph 8, starting with "this document defines a new BGP Address family.
You are defining two new AFI/SAFI pairs using a new Subsequent Address Family Identifier (SAFI)

Please adjust this paragraph to be consistent with current technology.
Review paragraphs 10 (starting "Typically, ") and paragraph 14 (starting "The BGP Extensions").
for the same error.

3) English errors in Introduction

Old Text: /
Typically a controller defines the set of policies and advertise
them to policy head-end routers (typically ingress routers).  The/
New text:/
Typically a controller defines the set of policies and advertises
them to policy head-end routers(typically ingress routers).  These /

(subject-verb alignment) plus "Reference to set".