Title: A Method for Generating Semantically Opaque Interface Identifiers with
IPv6 Stateless Address Autoconfiguration (SLAAC)
Author(s): Fernando Gont
(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?
Proposed Standard. The type of RFC is indicated in the 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:
This document specifies a method for generating IPv6 Interface
Identifiers to be used with IPv6 Stateless Address Autoconfiguration
(SLAAC), such that addresses configured using this method are stable
within each subnet, but the Interface Identifier changes when hosts
move from one network to another. This method is meant to be an
alternative to generating Interface Identifiers based on hardware
addresses (e.g., IEEE LAN MAC addresses), such that the benefits of
stable addresses can be achieved without sacrificing the privacy of
users. The method specified in this document applies to all prefixes
a host may be employing, including link-local, global, and unique-
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 was sent back to the working group based on the number of
comments received during the IETF last call. The current document is
significantly improved. After a long discussion, another working
group last call was done with support from the w.g. The chairs had two
reviewers, Ray Hunter and Mark Smith, do a detailed review of the
draft. This resulted in several changes in the current draft (-14).
The reviewers have told us that the new draft resolves the issues they
raised. The w.g. chairs believe the draft is ready to send to the IESG
In addition Alissa Cooper revised the document and is working on a draft
that provides an overview of the privacy considerations with all types of
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
No implementations known.
Bob Hinden is the Document Shepherd.
Brian Haberman 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
Reviewed the document, Idnits, verified IANA, Security and
References section, as well as verification of technical
descriptions. Detailed reviews by Ray Hunter and Mark Smith.
(4) Does the document Shepherd have any concerns about the depth or
breadth of the reviews that have been performed?
No, there was an active discussion on the mailing list and ten new
versions of the draft were produced. This document was also discussed
at the 6man session at IETF87.
(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
(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.
(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.
(8) Has an IPR disclosure been filed that references this document? If
so, summarize any WG discussion and conclusion regarding the IPR
(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?
The WG consensus appears solid. There was an active discussion on the
mailing list. The document has improved significantly since it was
sent back to the working group.
(10) Has anyone threatened an appeal or otherwise indicated extreme
discontent? If so, please summarize 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 http://www.ietf.org/tools/idnits/ and the
Internet-Drafts Checklist). Boilerplate checks are not enough; this
check needs to be thorough.
ID nits showed:
-- Obsolete informational reference (is this intentional?): RFC 1948
(Obsoleted by RFC 6528)
This can be fixed later if any other changes are needed, or at AUTH48.
(12) Describe how the document meets any required formal review
criteria, such as the MIB Doctor, media type, and URI type reviews.
Not required, no MIBs, media types, or URI types.
(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 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.
(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
This document does not have any IANA considerations.
(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, etc.