-----Original Message-----
From: Alanna Paloma <apal...@staff.rfc-editor.org>
Sent: Thursday, May 22, 2025 12:11 AM
To: Greg Mirsky <gregimir...@gmail.com>
Cc: James Guichard <james.n.guich...@futurewei.com>; Kireeti Kompella
<kireeti.i...@gmail.com>; Stewart Bryant <s...@stewartbryant.com>; Matthew
Bocci (Nokia) <matthew.bo...@nokia.com>; l...@pi.nu; Dongjie (Jimmy)
<jie.d...@huawei.com>; Rebecca VanRheenen
<rvanrhee...@staff.rfc-editor.org>; RFC Editor <rfc-edi...@rfc-editor.org>;
mpls-...@ietf.org; MPLS Working Group <mpls-cha...@ietf.org>; Adrian Farrel
<adr...@olddog.co.uk>; auth48archive <auth48archive@rfc-editor.org>
Subject: Re: AUTH48: RFC-to-be 9790 <draft-ietf-mpls-1stnibble-13> for your
review
Hi Greg,
Thank you for your approval. It has been noted on the AUTH48 status page:
https://www.rfc-editor.org/auth48/rfc9790
We will await approvals from Kireeti, Stewart, Matthew, Loa, and Jie prior to
moving this document forward in the publication process.
Best regards,
RFC Editor/ap
On May 20, 2025, at 2:04 PM, Greg Mirsky <gregimir...@gmail.com>
wrote:
Hi Alanna,
Thank you for keeping up with all the updates. I read Loa's latest update and
agree with it. Hence, I agree with all the updates applied during AUTH48.
Please let me know if you have any further questions.
Regards,
Greg
On Tue, May 20, 2025 at 10:40 AM Alanna Paloma
<apal...@staff.rfc-editor.org> wrote:
Hi James, Loa, and other authors,
James - Thank you for your approval. It has been noted on the AUTH48 status
page:
https://www.rfc-editor.org/auth48/rfc9790
Authors - We have updated the files per Loa’s updated text (see below).
We will await approvals from each party listed on the AUTH48 status page
prior to moving this document forward in the publication process.
— FILES (please refresh) —
Updated XML file:
https://www.rfc-editor.org/authors/rfc9790.xml
Updated output files:
https://www.rfc-editor.org/authors/rfc9790.txt
https://www.rfc-editor.org/authors/rfc9790.pdf
https://www.rfc-editor.org/authors/rfc9790.html
Diff file showing all changes made during AUTH48:
https://www.rfc-editor.org/authors/rfc9790-auth48diff.html
https://www.rfc-editor.org/authors/rfc9790-auth48rfcdiff.html (side by
side)
https://www.rfc-editor.org/authors/rfc9790-lastdiff.html (htmlwdiff diff
between last version and this)
https://www.rfc-editor.org/authors/rfc9790-lastrfcdiff.html (rfcdiff between
last version and this)
Diff files showing all changes:
https://www.rfc-editor.org/authors/rfc9790-diff.html
https://www.rfc-editor.org/authors/rfc9790-rfcdiff.html (side by side)
https://www.rfc-editor.org/authors/rfc9790-alt-diff.html (diff showing
changes where text is moved or deleted)
Best regards,
RFC Editor/ap
On May 20, 2025, at 3:09 AM, James Guichard
<james.n.guich...@futurewei.com> wrote:
Approved.
Jim
From: Alanna Paloma <apal...@staff.rfc-editor.org>
Date: Monday, May 19, 2025 at 4:27 PM
To: James Guichard <james.n.guich...@futurewei.com>, Greg Mirsky
<gregimir...@gmail.com>, Matthew Bocci (Nokia)
<matthew.bo...@nokia.com>
Cc: Rebecca VanRheenen <rvanrhee...@staff.rfc-editor.org>, Kireeti
Kompella <kireeti.i...@gmail.com>, Stewart Bryant <s...@stewartbryant.com>,
Jie Dong <jie.d...@huawei.com>, l...@pi.nu<l...@pi.nu>, RFC Editor
<rfc-edi...@rfc-editor.org>, mpls-...@ietf.org<mpls-...@ietf.org>, MPLS
Working Group <mpls-cha...@ietf.org>, Adrian Farrel <adr...@olddog.co.uk>,
auth48archive <auth48archive@rfc-editor.org>
Subject: [AD] Re: AUTH48: RFC-to-be 9790 <draft-ietf-mpls-1stnibble-13>
for your review
Hi Matthew, Greg, and James (AD)*,
*James - As the AD, please review and approve of the updated text and
removal of the BCP 14 keyword “MUST”.
Original:
Post-stack Header (PSH): optional field of interest to the egress
Label Switching Router (LSR) (and possibly to transit LSRs).
Examples include a control word [RFC4385], [RFC8964] or an
associated channel [RFC4385], [RFC5586], [RFC9546]. The PSH
MUST
indicate its length, so that a parser knows where the embedded
packet starts.
Current:
Post-Stack Header (PSH): A field containing information that may be
of interest to the egress Label Switching Router (LSR) or transit
LSRs. Examples include a control word [RFC4385] [RFC8964] or an
associated channel header [RFC4385] [RFC5586] [RFC9546]. A
parser
needs to be able to determine where the PSH ends in order to find
the embedded packet.
See this diff file:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fauthors%2Frfc9790-ad-diff.html&data=05%7C02%7Cjames.n.g
uichard%40futurewei.com%7C06ce9085667d46e12f1f08dd9713a199%7C0fee
8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C638832832784329230%7CU
nknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAw
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&sdata=R%2FdCX1QwTrCEPHMcmLGzolTGixI4Kv4U96A6IWzDztc%3D&reserve
d=0
Authors - Thank you for your replies. We have updated as requested. We
will await any further changes you may have and approvals from each author
and *James prior to moving forward in the publication process.
— FILES (please refresh) —
Updated XML file:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fauthors%2Frfc9790.xml&data=05%7C02%7Cjames.n.guichard
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RNEzPBurOpWcwBvFnb6zzBcRbDLwgxUOdIeGvtvaSo%3D&reserved=0
Updated output files:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fauthors%2Frfc9790.txt&data=05%7C02%7Cjames.n.guichard
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https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
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fc-editor.org%2Fauthors%2Frfc9790.html&data=05%7C02%7Cjames.n.guichar
d%40futurewei.com%7C06ce9085667d46e12f1f08dd9713a199%7C0fee8ff2a
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Diff file showing all changes made during AUTH48:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fauthors%2Frfc9790-auth48diff.html&data=05%7C02%7Cjame
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%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuM
DAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C
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&reserved=0
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fauthors%2Frfc9790-auth48rfcdiff.html&data=05%7C02%7Cja
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D&reserved=0 (side by side)
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fc-editor.org%2Fauthors%2Frfc9790-lastdiff.html&data=05%7C02%7Cjames.n.
guichard%40futurewei.com%7C06ce9085667d46e12f1f08dd9713a199%7C0fe
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ed=0 (htmlwdiff diff between last version and this)
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fauthors%2Frfc9790-lastrfcdiff.html&data=05%7C02%7Cjames.
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7C&sdata=5t81JSqP%2FFWISfESZJfJMBDyBE3A0mSQUnKd3wplyPQ%3D&rese
rved=0 (rfcdiff between last version and this)
Diff files showing all changes:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fauthors%2Frfc9790-diff.html&data=05%7C02%7Cjames.n.guic
hard%40futurewei.com%7C06ce9085667d46e12f1f08dd9713a199%7C0fee8ff
2a3b240189c753a1d5591fedc%7C1%7C1%7C638832832784422051%7CUnk
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ta=7cELS%2FmN0HNo8R9iRkGr4YiOW0Mx1uEtS410CAGKu0Y%3D&reserved=
0
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fauthors%2Frfc9790-rfcdiff.html&data=05%7C02%7Cjames.n.g
uichard%40futurewei.com%7C06ce9085667d46e12f1f08dd9713a199%7C0fee
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ed=0 (side by side)
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fauthors%2Frfc9790-alt-diff.html&data=05%7C02%7Cjames.n.g
uichard%40futurewei.com%7C06ce9085667d46e12f1f08dd9713a199%7C0fee
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&sdata=dMhRgIEsRsxMbOPh45dRF4QfYVuva0qtd%2B7oRiu6kuc%3D&reserve
d=0 (diff showing changes where text is moved or deleted)
For the AUTH48 status of this document, please see:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fauth48%2Frfc9790&data=05%7C02%7Cjames.n.guichard%40f
uturewei.com%7C06ce9085667d46e12f1f08dd9713a199%7C0fee8ff2a3b240
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3C9c%2FE2LQw5UhmDImxmEEjuBPcAgTN%2FoMgGEzCr0%3D&reserved=0
Thank you,
RFC Editor/ap
On May 19, 2025, at 9:47 AM, Greg Mirsky <gregimir...@gmail.com>
wrote:
Hi Rebecca,
I agree with the updates proposed by Matthew.
Regards,
Greg
On Mon, May 19, 2025 at 3:17 AM Matthew Bocci (Nokia)
<matthew.bo...@nokia.com> wrote:
Hi Rebecca
Thanks for the updated Auth48 text. I have a couple of comments.
Regards
Matthew
1. Introduction:
I think PSH in the second sentence should be pluralised:
OLD:
Examples of PSH include existing artifacts such as control words
[RFC4385], BIER (Bit Index Explicit Replication) headers [RFC8296] and the like,
as well as new types of PSH being discussed by the MPLS Working Group.
NEW:
Examples of PSHs include existing artifacts such as control words
[RFC4385], BIER (Bit Index Explicit Replication) headers [RFC8296] and the like,
as well as new types of PSH being discussed by the MPLS Working Group.
2.1 Definitions:
The definition of PSH is a bit unclear in terms of what it is referring to for
the optional field of interest, and it is also mandates that the PSH must
include
a length when in fact most existing PSHs (such as the PW CW or G-ACH) do not
include such a field. I would propose rephrasing to:
OLD:
Post-Stack Header (PSH):
Optional field of interest to the egress Label Switching Router (LSR) (and
possibly to transit LSRs). Examples include a control word [RFC4385] [RFC8964]
or an associated channel [RFC4385] [RFC5586] [RFC9546]. The PSH MUST
indicate its length, so that a parser knows where the embedded packet starts.
NEW:
Post-Stack Header (PSH):
A field containing information which may be of interest to the egress
Label Switching Router (LSR) or transit LSRs. Examples include a control word
[RFC4385] [RFC8964] or an associated channel header [RFC4385] [RFC5586]
[RFC9546]. A parser needs to be able to determine where the PSH ends in
order to find the embedded packet.
Best regards,
Matthew
From: Rebecca VanRheenen <rvanrhee...@staff.rfc-editor.org>
Date: Thursday, 15 May 2025 at 22:01
To: Greg Mirsky <gregimir...@gmail.com>, Kireeti Kompella
<kireeti.i...@gmail.com>, Stewart Bryant <s...@stewartbryant.com>, Matthew
Bocci (Nokia) <matthew.bo...@nokia.com>, Jie Dong <jie.d...@huawei.com>,
l...@pi.nu <l...@pi.nu>
Cc: RFC Editor <rfc-edi...@rfc-editor.org>, mpls-...@ietf.org
<mpls-...@ietf.org>, MPLS Working Group <mpls-cha...@ietf.org>, Adrian
Farrel <adr...@olddog.co.uk>, James Guichard
<james.n.guich...@futurewei.com>, auth48archive
<auth48archive@rfc-editor.org>
Subject: Re: AUTH48: RFC-to-be 9790 <draft-ietf-mpls-1stnibble-13> for
your review
[You don't often get email from rvanrhee...@staff.rfc-editor.org. Learn
why this is important at https://aka.ms/LearnAboutSenderIdentification ]
CAUTION: This is an external email. Please be very careful when clicking
links or opening attachments. See the URL nok.it/ext for additional
information.
Hi Greg and other authors,
Greg - Thank you for addressing all of our questions! We have updated
the document accordingly.
All - Please review the document carefully to ensure satisfaction as we do
not make changes once it has been published as an RFC. Contact us with any
further updates or with your approval of the document in its current form.
We will await approvals from each author prior to moving forward in the
publication process.
— FILES (please refresh) —
Updated XML file:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fauthors%2Frfc9790.xml&data=05%7C02%7Cjames.n.guichard
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Updated output files:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fauthors%2Frfc9790.txt&data=05%7C02%7Cjames.n.guichard
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Diff file showing all changes made during AUTH48:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fauthors%2Frfc9790-auth48diff.html&data=05%7C02%7Cjame
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fc-editor.org%2Fauthors%2Frfc9790-auth48rfcdiff.html&data=05%7C02%7Cja
mes.n.guichard%40futurewei.com%7C06ce9085667d46e12f1f08dd9713a199
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Diff files showing all changes:
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fc-editor.org%2Fauthors%2Frfc9790-diff.html&data=05%7C02%7Cjames.n.guic
hard%40futurewei.com%7C06ce9085667d46e12f1f08dd9713a199%7C0fee8ff
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&reserved=0
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fc-editor.org%2Fauthors%2Frfc9790-rfcdiff.html&data=05%7C02%7Cjames.n.g
uichard%40futurewei.com%7C06ce9085667d46e12f1f08dd9713a199%7C0fee
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(side by side)
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fc-editor.org%2Fauthors%2Frfc9790-alt-diff.html&data=05%7C02%7Cjames.n.g
uichard%40futurewei.com%7C06ce9085667d46e12f1f08dd9713a199%7C0fee
8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C638832832784531160%7CU
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&sdata=Rm2l%2B3Qh2ar3ghWBreV9J3HBpl5q1ZrzVwdw6l%2BplTQ%3D&rese
rved=0 (diff showing changes where text is moved or deleted)
For the AUTH48 status of this document, please see:
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fc-editor.org%2Fauth48%2Frfc9790&data=05%7C02%7Cjames.n.guichard%40f
uturewei.com%7C06ce9085667d46e12f1f08dd9713a199%7C0fee8ff2a3b240
189c753a1d5591fedc%7C1%7C1%7C638832832784539639%7CUnknown%7
CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJX
aW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=4hDL
oRGMovv%2FbLGWV0347BQOXz7Ka2kHL6KrbsWI8CI%3D&reserved=0
Thank you,
RFC Editor/rv
On May 14, 2025, at 4:41 PM, Greg Mirsky <gregimir...@gmail.com>
wrote:
Dear RFC Editor,
thank you for your help in improving this document. Please find my
notes below tagged GIM>>.
Regards,
Greg
From: rfc-edi...@rfc-editor.org <rfc-edi...@rfc-editor.org>
Date: Wednesday, 14 May 2025 at 05:24
To: kireeti.i...@gmail.com <kireeti.i...@gmail.com>,
s...@stewartbryant.com<s...@stewartbryant.com>, Matthew Bocci (Nokia)
<matthew.bo...@nokia.com>, gregimir...@gmail.com
<gregimir...@gmail.com>, l...@pi.nu <l...@pi.nu>, jie.d...@huawei.com
<jie.d...@huawei.com>
Cc: rfc-edi...@rfc-editor.org <rfc-edi...@rfc-editor.org>,
mpls-...@ietf.org<mpls-...@ietf.org>, mpls-cha...@ietf.org
<mpls-cha...@ietf.org>, adr...@olddog.co.uk <adr...@olddog.co.uk>,
james.n.guich...@futurewei.com<james.n.guich...@futurewei.com>,
auth48archive@rfc-editor.org<auth48archive@rfc-editor.org>
Subject: Re: AUTH48: RFC-to-be 9790 <draft-ietf-mpls-1stnibble-13> for
your review
CAUTION: This is an external email. Please be very careful when clicking
links or opening attachments. See the URL nok.it/ext for additional
information.
Authors,
While reviewing this document during AUTH48, please resolve (as
necessary) the following questions, which are also in the XML file.
1) <!-- [rfced] Please note that the abbreviated title of the document has
been
updated as follows. The abbreviated title only appears in the running
header in the pdf output.
Original:
1st nibble
Current:
First Nibble Following Label Stack
GIM>> Thank you; I agree.
-->
2) <!-- [rfced] Please insert any keywords (beyond those that appear in
the title) for use on
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.r
fc-editor.org%2Fsearch&data=05%7C02%7Cjames.n.guichard%40futurewei.co
m%7C06ce9085667d46e12f1f08dd9713a199%7C0fee8ff2a3b240189c753a1d
5591fedc%7C1%7C1%7C638832832784548567%7CUnknown%7CTWFpbGZsb
3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkF
OIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=9QxhyMT77pBRX
q9T%2B9JzhQ42Qsc%2F%2BIZLG98RWH8Tf7o%3D&reserved=0. -->
GIM>> Perhaps
Post-stack header
Load-balancing
3) <!-- [rfced] Please clarify "in the context associated". Note that there
is a similar sentence in the IANA section.
Original:
Although some existing network
devices may use such a method, it needs to be stressed that the
correct interpretation of the Post-stack First Nibble (PFN) in a PSH
can be made only in the context associated using the control or
management plane with the Label Stack Element (LSE) or group of
LSEs
in the preceding label stack that characterize the type of the PSH,
and that any attempt to rely on the value in any other context is
unreliable.
Perhaps:
Although some existing network
devices may use such a method, it needs to be stressed that the
correct interpretation of the Post-stack First Nibble (PFN) in a PSH
can be made only in the context of using the control or
management plane with the Label Stack Entry (LSE) or group of
LSEs
in the preceding label stack that characterizes the type of the PSH.
Any attempt to rely on the value in any other context is
unreliable.
Or (similar to sentence in IANA section):
Although some existing network
devices may use such a method, it needs to be stressed that the
correct interpretation of the Post-stack First Nibble (PFN) in a PSH
can be made only in the context of the Label Stack Entry (LSE) or
group of LSEs
in the preceding label stack that characterizes the type of the PSH.
Any attempt to rely on the value in any other context is
unreliable.
GIM>> Thank you for your creative options. I will propose another
re-wording using the first option with s/of using/established through/:
Although some existing network
devices may use such a method, it needs to be stressed that the
correct interpretation of the Post-stack First Nibble (PFN) in a PSH
can be made only in the context established through the control or
management plane with the Label Stack Entry (LSE) or group of
LSEs
in the preceding label stack that characterizes the type of the PSH.
Any attempt to rely on the value in any other context is
unreliable. -->
4) <!-- [rfced] How may we update the text starting with "including..." to
improve clarity?
Original:
* To stress the importance that any MPLS packet not carrying
plain
IPv4 or IPv6 packets contains a PSH, including any new version
of
IP (Section 2.4).
Perhaps:
* To stress that any MPLS packet not carrying plain
IPv4 or IPv6 packets contains a PSH. This also applies to packets
of
any new version of IP (see Section 2.4).
GIM>> Excellent! I agree.
-->
5) <!-- [rfced] The sentences below are from the last two paragraphs of
Section 1.
In the first sentence, will readers understand what is meant by "the
heuristic"? Would it be helpful to add more context, like that included
in the second sentence?
Original:
Based on the analysis of load-balancing techniques in Section 2.1.1,
this document, in Section 2.1.1.1, introduces a requirement that
deprecates the use of the heuristic and recommends using a
dedicated
label value for load balancing.
...
Furthermore, this document updates [RFC4928] by deprecating the
heuristic method for identifying the type of packet encapsulated in
MPLS.
Perhaps:
Section 2.1.1 of this document includes an analysis of
load-balancing
techniques; based on this, Section 2.1.1.1 introduces a requirement
that deprecates the use of the heuristic method for identifying the
type
of packet encapsulated in MPLS and recommends using a
dedicated label value for load balancing.
...
Furthermore, this document updates [RFC4928] by deprecating this
heuristic method.
GIM>> I like the proposed update of the first paragraph. Since it is
followed by two sentences, would "this heuristic method" reference be clear to
a reader? Would keeping that part unchanged be acceptable?
-->
6) <!-- [rfced] Would you like to alphabetize the list of abbreviations in
Section 1.3
("Abbreviations")? Or do you prefer the current order?
Similarly, would you like to alphabetize the terms in Section 1.2
("Definitions") or keep the current order?
GIM>> Yes, alphabetize them, please.
-->
7) <!-- [rfced] We updated this text as shown below. Specifically, we
moved the
third sentence of the first paragraph to follow the list and updated "A."
to read "Example A:". Let us know any concerns.
Original:
Figure 1 shows an MPLS packet with Layer 2 header X and a label
stack
Y ending with Label-n. Then, there are three examples of an MPLS
payload displayed in Figure 2. The complete MPLS packet thus
would
consist of [X Y A], or [X Y B], or [X Y C].
A. The first payload is a bare IP packet, i.e., no PSH. The PFN in
this case overlaps with the IP version number.
B. The next payload is a bare non-IP packet; again, no PSH. The
PFN
here is the first nibble of the payload, whatever it happens to be.
C. The last example is an MPLS Payload that starts with a PSH
followed by the embedded packet. Here, the embedded packet
could be
IP or non-IP.
Updated:
Figure 1 shows an MPLS packet with a Layer 2 header X and a label
stack
Y ending with Label-n. Figure 2 displays three examples of an
MPLS payload:
Example A: The first payload is a bare IP packet, i.e., no PSH. The
PFN in this case overlaps with the IP version number.
Example B: The next payload is a bare non-IP packet; again, no
PSH.
The PFN here is the first nibble of the payload, whatever it
happens to be.
Example C: This example is an MPLS Payload that starts with a
PSH
followed by the embedded packet. Here, the embedded
packet could
be IP or non-IP.
Thus, the complete MPLS packet would consist of [X Y A], [X Y B], or
[X Y C].
GIM>> Thank you for your updates that improve readability of the
document.
-->
8) <!-- [rfced] For readability, may we update this list as follows?
Original:
There are four common ways to load balance an MPLS packet:
1. One can use the top label alone.
2. One can do better by using all of the non-SPLs (Special Purpose
Labels) [RFC7274] in the stack.
3. One can do even better by "divining" the type of embedded
packet,
and using fields from the guessed header. The ramifications
of
using this load-balancing technique are discussed in detail in
Section 2.1.1.1.
4. One can do best by using either an Entropy Label [RFC6790] or
a
Flow-Aware Transport (FAT) Pseudowire Label [RFC6391] (see
Section 2.1.1.1).
Perhaps:
There are four common ways to load balance an MPLS packet:
1. Use the top label alone.
2. Use all of the non-SPLs (Special Purpose
Labels) [RFC7274] in the stack. This is better than using the
top label alone.
3. Divine the type of embedded packet
and use fields from the guessed header. The ramifications of
using this load-balancing technique are discussed in detail in
Section 2.1.1.1. This way is better than the two ways above.
4. Use either an Entropy Label [RFC6790] or a
Flow-Aware Transport (FAT) Pseudowire Label [RFC6391] (see
Section 2.1.1.1). This is the best way.
GIM>> I agree with the proposed updates with a suggestion to maintain
quotation marks as "divine".
-->
9) <!-- [rfced] Would including some text to introduce the numbered list
in
Section 2.1.1.1 be helpful? If so, please provide the text.
GIM>> I think that the current text is sufficient but I am open to any
text other authors propose.
-->
10) <!-- [rfced] Would it be helpful to update "Support for" to "The
framework
for" in this sentence?
Original:
Support for MPLS Network Actions (MNAs) is described in
[I-D.ietf-mpls-mna-fwk] and is an enhancement to the MPLS
architecture.
Perhaps:
The framework for MPLS Network Actions (MNAs) is described in
[RFC9789] and
is an enhancement to the MPLS architecture.
GIM>> I agree with the proposed change.
-->
11) <!-- [rfced] This sentence notes that the PFN value of 0x0 has two
different
formats, but the IANA registry in Section 3 lists the value 0x0 three
times. Please review and let us know if any updates are needed.
Original:
This issue is described in section 3.6.1 of [I-D.ietf-mpls-mna-fwk]
and is further illustrated by the PFN value of 0x0 which has two
different formats depending on whether the PSH is a pseudowire
control word or a DetNet control word ...
GIM>> Your observation is correct. Value 0x0 is used by three services
that are listed in the IANA registry in Section 3. But two of these services use
four-octet long format, while one - eight-octet long format. Thus, three entries
in the registry but only two formats.
-->
12) <!-- [rfced] How may we clarify "leading to [RFC4928]"?
Original:
It was then discovered that
non-IP packets, misidentified as IP when the heuristic failed, were
being badly load balanced, leading to [RFC4928].
Perhaps:
It was then discovered that
non-IP packets, misidentified as IP when the heuristic failed, were
being badly load-balanced, leading to the scenario described in
[RFC4928].
GIM>> Thank you for your creative editing! I agree with the proposed
update.
-->
13) <!-- [rfced] What does "it" refer to here?
Original:
It would assist with the progress toward a simpler, more coherent
system of MPLS data encapsulation if the use a PSH for non-IP
payloads encapsulated in MPLS was obsoleted.
Perhaps:
If the use a PSH for non-IP
payloads encapsulated in MPLS were obsoleted, this would assist
with
the progress toward a simpler, more coherent
system of MPLS data encapsulation
Or:
Obsoleting the use a PSH for non-IP
payloads encapsulated in MPLS would assist with the progress
toward a simpler, more coherent
system of MPLS data encapsulation.
GIM>> Thank you for proposing two excellent options.I slightly prefer
the second with a minor modification (two options ;-) :
s/the use a PSH/the use of a PSH/ or s/the use a PSH/using a PSH/
-->
14) <!-- [rfced] Please review "to load-balancing MPLS data flows".
Should the
"load balance" be used instead of the "load-balancing"? Or
is the current correct?
Original:
However, before that
can be done, it is important to collect sufficient evidence that
there are no marketed or deployed implementations using the
heuristic
practice to load-balancing MPLS data flows.
Perhaps:
However, before that
can be done, it is important to collect sufficient evidence that
there are no marketed or deployed implementations using the
heuristic
practice to load balance MPLS data flows.
GIM>> I think that the current form is acceptable. What do other
authors think?
-->
15) <!-- [rfced] We removed the expansion "Network Service Header" in
Table 1 as
this is expanded previously in the document. If no objections, we will
ask IANA to update the "Post-Stack First Nibble" registry accordingly
prior to publication.
Link to registry:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.i
ana.org%2Fassignments%2Fpost-stack-first-nibble&data=05%7C02%7Cjames.n
.guichard%40futurewei.com%7C06ce9085667d46e12f1f08dd9713a199%7C0f
ee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C638832832784557318%7
CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDA
wMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7
C&sdata=icRrDJa8CveyR3N1O9%2FmpH%2BfnNqeC01L6JdgsX4LTLQ%3D&rese
rved=0
Original:
| NSH | 0x0 | NSH (Network Service Header)
| | | Base Header, payload
Current:
| NSH | 0x0 | NSH Base Header, paylod
GIM>> I agree; your update makes the table easier to read.
-->
16) <!-- [rfced] Abbreviations
a) FYI - We updated the expansion for LSE as follows to align with the
expansion used in RFCs-to-be 9789 and 9791. Also, "Label Stack
Element" has
not been used in published RFCs.
Original:
Label Stack Element
Updated:
Label Stack Entry
GIM>> Great catch, thank you. I agree.
b) FYI - We have added expansions for the following abbreviations
per Section 3.6 of RFC 7322 ("RFC Style Guide"). Please review each
expansion in the document carefully to ensure correctness.
Deterministic Networking (DetNet)
Virtual Private LAN Service (VPLS)
Media Access Control (MAC)
GIM>> Thank you for your thorough work with the document. I agree.
-->
17) <!-- [rfced] Please review the "Inclusive Language" portion of the
online
Style Guide
<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww
.rfc-editor.org%2Fstyleguide%2Fpart2%2F%23inclusive_language&data=05%7C
02%7Cjames.n.guichard%40futurewei.com%7C06ce9085667d46e12f1f08dd9
713a199%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C1%7C638832832
784567675%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlY
iOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7
C0%7C%7C%7C&sdata=kHkZBO5Z23qFXGoNFVM0PCrpYoZBAxYcOL3NVr2u4Kk
%3D&reserved=0>
and let us know if any changes are needed. Updates of this nature
typically
result in more precise language, which is helpful for readers.
Note that our script did not flag any words in particular, but this should
still be reviewed as a best practice.
GIM>> Thank you for checking that. I couldn't find anything that raises
a red flag.
-->
Thank you.
RFC Editor/rv
On May 13, 2025, at 9:19 PM, rfc-edi...@rfc-editor.org wrote:
*****IMPORTANT*****
Updated 2025/05/13
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--------------------------------------
RFC9790 (draft-ietf-mpls-1stnibble-13)
Title : IANA Registry and Processing Recommendations for
the First Nibble Following a Label Stack
Author(s) : K. Kompella, S. Bryant, M. Bocci, G. Mirsky, L.
Andersson, J. Dong
WG Chair(s) : Tarek Saad, Tony Li, Adrian Farrel
Area Director(s) : Jim Guichard, Ketan Talaulikar, Gunter Van de Velde
