Updates to the Allocation Policy for the Border Gateway Protocol - Link State (BGP-LS) Parameters Registries
draft-ietf-idr-bgp-ls-registry-06
IDR Group A. Farrel
Internet-Draft Old Dog Consulting
Updates: 7752 (if approved) March 30, 2021
Intended status: Standards Track
Expires: October 1, 2021
Updates to the Allocation Policy for the Border Gateway Protocol - Link
State (BGP-LS) Parameters Registries
draft-ietf-idr-bgp-ls-registry-06
Abstract
RFC 7752 defines Border Gateway Protocol - Link State (BGP-LS). IANA
created a registry consistent with that document called the "Border
Gateway Protocol - Link State (BGP-LS) Parameters Registry" with a
number of sub-registries. The allocation policy applied by IANA for
those registries is "Specification Required" as defined in RFC 8126.
This document updates RFC 7752 by changing the allocation policy for
all of the registries to "Expert Review" and by updating the guidance
to the Designated Experts.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on October 1, 2021.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 3
2.1. Guidance for Designated Experts . . . . . . . . . . . . . 3
3. Security Considerations . . . . . . . . . . . . . . . . . . . 4
4. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 5
5. Normative References . . . . . . . . . . . . . . . . . . . . 5
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 5
1. Introduction
Border Gateway Protocol - Link State (BGP-LS) [RFC7752] requested
IANA to create a registry called the "Border Gateway Protocol - Link
State (BGP-LS) Parameters Registry" with a number of sub-registries.
The allocation policy applied by IANA for those registries is
"Specification Required" as defined in [RFC8126].
The "Specification Required" policy requires evaluation of any
assignment request by a "Designated Expert" and guidelines for any
such experts are given in section 5.1 of [RFC7752]. In addition,
this policy requires that "the values and their meanings must be
documented in a permanent and readily available public specification,
in sufficient detail so that interoperability between independent
implementations is possible" [RFC8126]. Further, the intention
behind "permanent and readily available" is that "a document can
reasonably be expected to be findable and retrievable long after IANA
assignment of the requested value" [RFC8126].
Another allocation policy called "Expert Review" is defined in
[RFC8126]. This policy also requires Expert Review, but has no
requirement for a formal document.
All reviews by Designated Experts are guided by advice given in the
document that defined the registry and set the allocation policy.
This document updates RFC 7752 by changing the allocation policy for
all of the registries to "Expert Review" and updating the guidance to
the Designated Experts.
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1.1. Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
2. IANA Considerations
IANA maintains a registry called the "Border Gateway Protocol - Link
State (BGP-LS) Parameters Registry". This registry contains four
sub-registries:
o BGP-LS NLRI-Types
o BGP-LS Node Descriptor, Link Descriptor, Prefix Descriptor, and
Attribute TLVs
o BGP-LS Protocol-IDs
o BGP-LS Well-Known Instance-IDs
IANA is requested to change the assignment policy for each of these
registries to "Expert Review".
2.1. Guidance for Designated Experts
Section 5.1 of [RFC7752] gives guidance to Designated Experts. This
section replaces that guidance.
In all cases of review by the Designated Expert (DE) described here,
the DE is expected to check the clarity of purpose and use of the
requested code points. The following points apply to the registries
discussed in this document:
1. Application for a code point allocation may be made to the
Designated Experts at any time, and MUST be accompanied by
technical documentation explaining the use of the code point.
Such documentation SHOULD be presented in the form of an
Internet-Draft, but MAY arrive in any form that can be reviewed
and exchanged amongst reviewers.
2. The Designated Experts SHOULD only consider requests that arise
from I-Ds that have already been accepted as Working Group
documents or that are planned for progression as AD Sponsored
documents in the absence of a suitably chartered Working Group.
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3. In the case of Working Group documents, the Designated Experts
MUST check with the Working Group chairs that there is consensus
within the Working Group to make the allocation at this time. In
the case of AD Sponsored documents, the Designated Experts MUST
check with the AD for approval to make the allocation at this
time.
4. If the document is not adopted by the IDR Working Group (or its
successor), the Designated Expert MUST notify the IDR mailing
list (or its successor) of the request and MUST provide access to
the document. The Designated Expert MUST allow two weeks for any
response. Any comments received MUST be considered by the
Designated Expert as part of the subsequent step.
5. The Designated Experts MUST then review the assignment requests
on their technical merit. The Designated Experts MAY raise
issues related to the allocation request with the authors and on
the IDR (or successor) mailing list for further consideration
before the assignments are made.
6. The Designated Expert MUST ensure that any request for a code
point does not conflict with work that is active or already
published within the IETF.
7. Once the Designated Experts have granted approval, IANA will
update the registry by marking the allocated code points with a
reference to the associated document.
8. In the event that the document is a Working Group document or is
AD Sponsored, and that document fails to progress to publication
as an RFC, the Working Group chairs or AD SHOULD contact IANA to
coordinate about marking the code points as deprecated. A
deprecated code point is not marked as allocated for use and is
not available for allocation in a future document. The WG chairs
may inform IANA that a deprecated code point can be completely
de-allocated (i.e., made available for new allocations) at any
time after it has been deprecated if there is a shortage of
unallocated code points in the registry.
3. Security Considerations
The security consideration of [RFC7752] still apply.
Note that the change to the expert review guidelines makes the
registry and the Designated Experts slightly more vulnerable to
denial of service attacks through excessive and bogus requests for
code points. It is expected that the registry cannot be effectively
attacked because the Designated Experts would, themselves, fall to
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any such attack first. Designated Experts are expected to report to
the IDR working group chairs and responsible Area Director if they
believe an attack to be in progress, and should immediately halt all
requests for allocation. This may temporarily block all legitimate
requests until mitigations have been put in place.
4. Acknowledgements
This work is based on the IANA considerations section of [RFC7752].
The author thanks the people who worked on that document.
The author would like to be able to thank John Scudder for suggesting
the need for this document.
Thanks to John Scudder, Donald Eastlake, Ketan Talaulikar, and Alvaro
Retana for review, comments, and discussion.
Additional thanks to Gyan Mishra, Acee Lindem, Ketan Talaulikar, Les
Ginsberg, Bruno Decraene, Benjamin Kaduk, and Martin Vigoureux for
engaging in discussion on the details of this work.
5. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
[RFC7752] Gredler, H., Ed., Medved, J., Previdi, S., Farrel, A., and
S. Ray, "North-Bound Distribution of Link-State and
Traffic Engineering (TE) Information Using BGP", RFC 7752,
DOI 10.17487/RFC7752, March 2016,
<https://www.rfc-editor.org/info/rfc7752>.
[RFC8126] Cotton, M., Leiba, B., and T. Narten, "Guidelines for
Writing an IANA Considerations Section in RFCs", BCP 26,
RFC 8126, DOI 10.17487/RFC8126, June 2017,
<https://www.rfc-editor.org/info/rfc8126>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>.
Author's Address
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Adrian Farrel
Old Dog Consulting
Email: adrian@olddog.co.uk
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