Skip to main content

Shepherd writeup

As required by RFC 4858, this is the current template for the Document
Shepherd Write-Up. Changes are expected over time.

This version is dated 1 November 2019.

(1)     What type of RFC is being requested (BCP, Proposed Standard, Internet
Standard, Informational, Experimental, or Historic)?

Proposed Standard

(2)     Why is this the proper type of RFC?

This document normatively specifies use of the MPLS DetNet encapsulation over
an IP network.

(3)     Is this type of RFC indicated in the title page header?


(2) The IESG approval announcement includes a Document Announcement Write-Up.
Please provide such a Document Announcement Write-Up. Recent examples can be
found in the "Action" announcements for approved documents. The approval
announcement contains the following sections:

Technical Summary:

This document specifies use of the MPLS DetNet encapsulation over an IP
network.  The approach is modeled on the operation of MPLS over an IP Packet
Switched Network (PSN) [RFC7510].  It maps the MPLS data plane encapsulation
described in [I-D.ietf-detnet-mpls] to the DetNet IP data plane defined in
[I-D.ietf-detnet-ip]. Procedures and control information common to all DetNet
data planes can be found in ietf-detnet-data-plane-framework.

Working Group Summary:

Was there anything in WG process that is worth noting? For example, was there
controversy about particular points or were there decisions where the consensus
was particularly rough?

No controversy, pretty much just putting the pieces together.

Document Quality:

Are there existing implementations of the protocol?

At this time there are no shipping implementations of DetNet per se, however
clearly IP and MPLS are mature technologies.

Have a significant number of vendors indicated their plan to implement the

Several major vendors have been core to the development of DetNet, including
Cisco, Huawei, and Ericsson so it is assumed that they plan to implement it.

Are there any reviewers that merit special mention as having done a thorough
review, e.g., one that resulted in important changes or a conclusion that the
document had no substantive issues? If there was a MIB Doctor, YANG Doctor,
Media Type or other expert review, what was its course (briefly)? In the case
of a Media Type review, on what date was the request posted?

The DetNet WG have made extensive reviews of the present drafts. In addition, a
dedicated Data Plane Design team have met informally, regularly, to review and
progress this draft (and the associated set of data plane drafts). Preceding
the WG decisions to use IP and MPLS for the DetNet Data Plane, an extensive
review of candidate technologies was done by Jouni Korhonen and team


Who is the Document Shepherd?
Ethan Grossman

Who is the Responsible Area Director?

Deborah Brungard

(3) Briefly describe the review of this document that was performed by the
Document Shepherd. If this version of the document is not ready for
publication, please explain why the document is being forwarded to the IESG.

I have read this document as it has progressed as well as in its final form,
and have submitted a number of comments on the previous version, all
grammatical and/or formatting, and they have been addressed in this version,
along with other comments from other reviewers. The document is ready for

(4)     Does the document Shepherd have any concerns about the depth or breadth
of the reviews that have been performed?

No concerns. Numerous very experienced IP and MPLS WG members have reviewed it.

(5) Do portions of the document need review from a particular or from broader
perspective, e.g., security, operational complexity, AAA, DNS, DHCP, XML, or
internationalization? If so, describe the review that took place.

No concerns.

(5)     Describe any specific concerns or issues that the Document Shepherd has
with this document that the Responsible Area Director and/or the IESG should be
aware of? For example, perhaps he or she is uncomfortable with certain parts of
the document, or has concerns whether there really is a need for it. In any
event, if the WG has discussed those issues and has indicated that it still
wishes to advance the document, detail those concerns here.

No concerns. The draft is ready to be published.

(6)     Has each author confirmed that any and all appropriate IPR disclosures
required for full conformance with the provisions of BCP 78 and BCP 79 have
already been filed. If not, explain why?

Yes, authors/contributors know of none, see

(8) Has an IPR disclosure been filed that references this document? If so,
summarize any WG discussion and conclusion regarding the IPR disclosures.

There were no IPR concerns raised during WG acceptance of the document, nor
during the period of its development.

(9) How solid is the WG consensus behind this document? Does it represent the
strong concurrence of a few individuals, with others being silent, or does the
WG as a whole understand and agree with it?

Very solid.  The document (in the context of the full set of DetNet Data Plane
drafts) is mature and has been discussed sufficiently among the broad DetNet WG

(10) Has anyone threatened an appeal or otherwise indicated extreme discontent?
If so, please summarise the areas of conflict in separate email messages to the
Responsible Area Director. (It should be in a separate email because this
questionnaire is publicly available.)


(11) Identify any ID nits the Document Shepherd has found in this document.
(See and the Internet-Drafts Checklist).
Boilerplate checks are not enough; this check needs to be thorough.

IDNits passes without errors.
There are a few idnits warnings regarding "outdated references" but this is
because this is one of a set of drafts that refer to each other and will all be
published together, so the RFC editor can fix this once all edits are final.

(12) Describe how the document meets any required formal review criteria, such
as the MIB Doctor, YANG Doctor, media type, and URI type reviews.


(13) Have all references within this document been identified as either
normative or informative?


(14) Are there normative references to documents that are not ready for
advancement or are otherwise in an unclear state? If such normative references
exist, what is the plan for their completion?


(15) Are there downward normative references (see RFC 3967)? If so, list these
downward references to support the Area Director in the Last Call procedure.


(16) Will publication of this document change the status of any existing RFCs?
Are those RFCs listed on the title page header, listed in the abstract, and
discussed in the introduction? If the RFCs are not listed in the Abstract and
Introduction, explain why, and point to the part of the document where the
relationship of this document to the other RFCs is discussed. If this
information is not in the document, explain why the WG considers it unnecessary.

No, N/A.

(17) Describe the Document Shepherd's review of the IANA considerations
section, especially with regard to its consistency with the body of the
document. Confirm that all protocol extensions that the document makes are
associated with the appropriate reservations in IANA registries. Confirm that
any referenced IANA registries have been clearly identified. Confirm that newly
created IANA registries include a detailed specification of the initial
contents for the registry, that allocations procedures for future registrations
are defined, and a reasonable name for the new registry has been suggested (see
RFC 8126).

N/A, no IANA requests.

(18) List any new IANA registries that require Expert Review for future
allocations. Provide any public guidance that the IESG would find useful in
selecting the IANA Experts for these new registries.


(19) Describe reviews and automated checks performed by the Document Shepherd
to validate sections of the document written in a formal language, such as XML
code, BNF rules, MIB definitions, YANG modules, etc.

The only automated review was idnits.

(20) If the document contains a YANG module, has the module been checked with
any of the recommended validation tools
( for syntax and
formatting validation? If there are any resulting errors or warnings, what is
the justification for not fixing them at this time? Does the YANG module comply
with the Network Management Datastore Architecture (NMDA) as specified in

YANG models related to DetNet are in a separate draft, so N/A here.