GMPLS OSPF-TE Extensions in Support of Flexi-Grid Dense Wavelength Division Multiplexing (DWDM) Networks
draft-ietf-ccamp-flexible-grid-ospf-ext-09

Request for posting confirmation emailed to previous authors: "Daniele Ceccarelli" , ccamp-chairs@ietf.org, "Oscar de Dios" , "Xian Zhang" , "Ramon Casellas" , " zhenghaomian@huawei.com"

[Ballot comment]
Thanks for your work on this draft.

I don't see a response to the SecDir review that asks for more clarity in the draft on OSPF Opaque LSAs, mentioned in the security considerations section, but not elsewhere.
https://www.ietf.org/mail-archive/web/secdir/current/msg07120.html

Could some text be added to help with this request?

[Ballot comment]
I don't see a response to the SecDir review that asks for more clarity in the draft on OSPF Opaque LSAs, mentioned in the security considerations section, but not elsewhere.
https://www.ietf.org/mail-archive/web/secdir/current/msg07120.html

[Ballot comment]
1) Is it really necessary to define a sub-TLV to a sub-TLV? The Interface Switching Capability Descriptor is already a sub-TLV of the Link TLV and now you define another sub-sub-TVL for the Frequency availability bitmap. Is it really necessary to have another sub-TLV system here and a new/own registry, given you only define one (!) sub-sub-TLV? I would say you should remove this sub-sub-TLV system and the registry and simply define the bitmap as fixed part of the new Flexi-Grid-LSC sub-TLV. And if you every need another sub-sub-TLV you simply define another ISCD sub-TLV instead. I really don't think the additional complexity of this sub-sub-TLV system and the registry is justified!

2) The Port Label Restriction field as specified in RFC7579 is not a sub-TLV but a field; see section 4.2:
"The Port Label Restriction sub-TLV is defined in [RFC7579]. "

3) Section 3 does not specify any requirements (as the title indicates) but only given some quite extensive background information. I don't think this is needed (anymore) for the final published document and could be completely removed or compressed to a few paragraphs in the intro.

Request for posting confirmation emailed to previous authors: "Daniele Ceccarelli" , ccamp-chairs@ietf.org, "Oscar de Dios" , "Xian Zhang" , "Ramon Casellas" , " zhenghaomian@huawei.com"

(Via drafts-lastcall@iana.org): IESG/Authors/WG Chairs:

The IANA Services Operator has completed its review of draft-ietf-ccamp-flexible-grid-ospf-ext-07.txt. If any part of this review is inaccurate, please let us know.

The IANA Services Operator has a question about one of the actions requested in the IANA Considerations section of this document.

The IANA Services Operator understands that, upon approval of this document, there are two actions which we must complete.

First, in the Switching Types subregistry of the GMPLS Signaling Parameters registry located at:

http://www.iana.org/assignments/gmpls-sig-parameters/

a new switching type will be registered as follows:

Value: [ TBD-at-registration ]
Name: Flexi-Grid-LSC
Reference: [ RFC-to-be ]

Second, a new registry is to be created called the Types for sub-TLVs of Flexi-Grid-LSC SCSI (Switch Capability-Specific Information) registry. The new registry is to be located in the Open Shortest Path First (OSPF) Traffic Engineering TLVs registry located at:

https://www.iana.org/assignments/ospf-traffic-eng-tlvs/

IANA Services Operator Question --> Consulting RFC 5226, what should be the maintenance policy be for this new registry?

There are to be initial registrations in the new registry as follows:

Value Sub-TLV Reference
--------- -------------------------- -------------
0 Reserved [ RFC-to-be ]
1 Frequency availability bitmap [ RFC-to-be ]

The IANA Services Operator understands that these two actions are the only ones required to be completed upon approval of this document.

Note:  The actions requested in this document will not be completed until the document has been approved for publication as an RFC. This message is only to confirm what actions will be performed.

Thank you,

Sabrina Tanamal
IANA Services Specialist
PTI

The following Last Call announcement was sent out:

From: The IESG
To: "IETF-Announce"
CC: "Dieter Beller" , ccamp-chairs@ietf.org, draft-ietf-ccamp-flexible-grid-ospf-ext@ietf.org, db3546@att.com, ccamp@ietf.org, dieter.beller@nokia.com
Reply-To: ietf@ietf.org
Sender:
Subject: Last Call:  (GMPLS OSPF-TE Extensions in support of Flexi-grid DWDM networks) to Proposed Standard


The IESG has received a request from the Common Control and Measurement
Plane WG (ccamp) to consider the following document:
- 'GMPLS OSPF-TE Extensions in support of Flexi-grid DWDM networks'
  as Proposed Standard

The IESG plans to make a decision in the next few weeks, and solicits
final comments on this action. Please send substantive comments to the
ietf@ietf.org mailing lists by 2017-01-31. Exceptionally, comments may be
sent to iesg@ietf.org instead. In either case, please retain the
beginning of the Subject line to allow automated sorting.

Abstract


  The International Telecommunication Union Telecommunication
  Standardization Sector (ITU-T) has extended its Recommendations
  G.694.1 and G.872 to include a new Dense Wavelength Division
  Multiplexing (DWDM) grid by defining a set of nominal central
  frequencies, channel spacings, and the concept of the "frequency
  slot". Corresponding techniques for data-plane connections are know
  as flexi-grid.

  Based on the characteristics of flexi-grid defined in G.694.1, RFC
  7698 and 7699, this document describes the OSPF-TE extensions in
  support of GMPLS control of networks that include devices that use
  the new flexible optical grid.




The file can be obtained via
https://datatracker.ietf.org/doc/draft-ietf-ccamp-flexible-grid-ospf-ext/

IESG discussion can be tracked via
https://datatracker.ietf.org/doc/draft-ietf-ccamp-flexible-grid-ospf-ext/ballot/


No IPR declarations have been submitted directly on this I-D.

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 24 February 2012.

(1) What type of RFC is being requested (BCP, Proposed Standard,
Internet Standard, Informational, Experimental, or Historic)?  Why
is this the proper type of RFC?  Is this type of RFC indicated in the
title page header?

This document is requested for publication as Standards Track RFC.

This is appropriate because the document defines GMPLS OSPF-TE extensions that
are required to support DWDM networks that support the flexible DWDM grid as
defined in ITU-T Recommendation G.694.1.
Moreover, this document is related to Standards Track RFC7579 and Standards
Track RFC7699 as it defines the OSPF-TE extensions for the new flexible DWDM
grid in addition to the existing fixed DWDM grid.

"Standards Track" RFC type is correctly 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

  Relevant content can frequently be found in the abstract
  and/or introduction of the document. If not, this may be
  an indication that there are deficiencies in the abstract
  or introduction.

The document defines necessary OSPF-TE extensions for GMPLS in order to support
new flexible grid data plane functionality that is defined in ITU-T Recommendation
G.694.1 for DWDM networks. Currently, OSPF-TE for GMPLS can only be used for
fixed grid DWDM networks. The document extends RFC4203 and RFC7580.

Document abstract:
"This memo describes the OSPF-TE extensions in support of GMPLS control of
networks that include devices that use the new flexible optical grid."


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?

This document has been reviewed by the CCAMP working group and received some
comments at IETF meetings and on the mailing list.

Version 02 of the document contained 3 options how to encode “available resources”.
When the document was presented at the Prague meeting in July 2015, it was agreed
to reduce these options preferably to a single encoding. The CCAMP did a poll on the
CCAMP mailing list and there was a clear majority vote in favor of the encoding
currently defined in the document. The other 2 options were removed.

Finally, there were no problems with reaching WG consensus.


Document Quality

  Are there existing implementations of the protocol? Have a
  significant number of vendors indicated their plan to
  implement the specification? 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, 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 work has had contributions from a larger group of people.
Additionally, the work has had external review form the IDEALIST EU project.
One of the IDEALIST goals is to foster elastic optical networks equipped with
a multi-domain and multi-technology control plane enabling adaptive network
and service interworking. Several optical equipment vendors are participating
in this project.

Based on the document shepherd's knowledge, a significant number of vendors
are considering the implementation or have already an implementation of the
protocol extensions for their DWDM products supporting the flexible grid.


Personnel

  Who is the Document Shepherd? Who is the Responsible Area
  Director?

Dieter Beller is the Document Shepherd.
Deborah Brungard is the Responsible Area Director.


(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.

The document shepherd has reviewed the current revision of the document:
draft-ietf-ccamp-flexible-grid-ospf-ext-06.txt and believes it is ready for
publication when it will have been updated based on the improvements
suggested hereafter:

The Abstract should be enhanced. It is fairly short. Some text from the
Abstract of RFC7698 could be used. The Abstract should explicitly mention
ITU-T Recommendation G.694.1 (see abstract of RFC7698).

The last paragraph of the Introduction should contain a reference to RFC4203.
It shall also state that this document defines extensions to RFC7580.

Editorial comments/corrections have been sent to the authors.

Corrections are required in lines 120, 247, and 509.


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

The document shepherd has no concerns.


(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 such specific review is required.


(6) 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.

There are no such concerns.


(7) 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.

The WG chairs chased all authors and contributors for statements that they
had complied with IETF IPR policy. All responded.


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

No IPR disclosures have been made.


(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? 

There has been substantial and broad review. There is good consensus on
the document.


(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.)

No threats or discontent.


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

idnits is clean apart from false positives. See:
https://www.ietf.org/tools/idnits?url=https://www.ietf.org/archive/id/draft-ietf-ccamp-flexible-grid-ospf-ext-06.txt


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

No such reviews are needed.


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

All references are correctly identified.


(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?

There are no such normative references.


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

There are no such downward normative references.


(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.

The document defines OSPF-TE extensions for GMPLS in order to support
new data plane functionality that has been defined by the ITU-T for
DWDM networks. Therefore, it is solely an extension to RFC4203 and
RFC7580, respectively, and does not change the status of RFC4203,
RFC7580, or any other existing RFC.


(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 5226).

The IANA section of the document is properly written and contains all
relevant information.

The document defines one required extension of an existing IANA registry:
  http://www.iana.org/assignments/gmpls-sig-parameters/gmpls-sig-parameters.xhtml
and defines a new sub-registry under:
  http://www.iana.org/assignments/gmpls-sig-parameters/gmpls-sig-parameters.xhtml

The suggested name for the new sub-registry "Types for sub-TLVs of
Flexi-Grid-LSC SCSI (Switch Capability-Specific Information)" is reasonable.
The document also provides suggested registry values, which are appropriate.


(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.

The new sub-registry is defined properly.


(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, etc.

The document does not contain such sections.

Request for posting confirmation emailed to previous authors: "Daniele Ceccarelli" , ccamp-chairs@ietf.org, "Oscar de Dios" , "Xian Zhang" , "Ramon Casellas" , " zhenghaomian@huawei.com"

Request for posting confirmation emailed to previous authors: "Daniele Ceccarelli" , ccamp-chairs@ietf.org, "Oscar Gonzalez de Dios" , "Xian Zhang" , "Ramon Casellas" , "zhenghaomian@huawei.com"

IPR Responses:
From Haomian Zheng: https://mailarchive.ietf.org/arch/msg/ccamp/s800Wmg47J_0yUfESm3W8cBK3N4
From Ramon: https://mailarchive.ietf.org/arch/msg/ccamp/4UX3FpHya_Haov7WSLCPWijaCgg
From Adrian: https://mailarchive.ietf.org/arch/msg/ccamp/Q1YY-jbyXKNg2eJLoSmdRyUMBRw
From Daniele: https://mailarchive.ietf.org/arch/msg/ccamp/IXaVkASYZlzwDIqJI13F-A4TB4k
From Guoying Zhang: https://mailarchive.ietf.org/arch/msg/ccamp/wQTEQw1hDJViV7h02rPytle1h4E
From Fatai Zhang: https://mailarchive.ietf.org/arch/msg/ccamp/AQJ_9FLzqAVGN78K8ermGAZmGmk
From Xian Zhang: https://mailarchive.ietf.org/arch/msg/ccamp/dOxwPTT5cVABgMAohVlPSkH24i4
From Lei Wang: https://mailarchive.ietf.org/arch/msg/ccamp/Wj7q-UIttfA-Li1w0Fan_fmv4-I
From Oscar: https://mailarchive.ietf.org/arch/msg/ccamp/qiNZwGzmYpl631kLlAubGGKd-cA