Internet Engineering Task Force (IETF) C. Loibl
Request for Comments: 9184 next layer Telekom GmbH
Updates: 7153, 8955 January 2022
Category: Standards Track
ISSN: 2070-1721
BGP Extended Community Registries Update
Abstract
This document updates several BGP Extended Community registries in
order to replace the "Experimental Use" registration procedure in
some entries, since their use is clearly not experimental and is thus
misleading.
This document updates RFCs 7153 and 8955.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc9184.
Copyright Notice
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Table of Contents
1. Introduction
2. IANA Considerations
2.1. Registry: BGP Transitive Extended Community Types
2.2. Registry: Generic Transitive Experimental Use Extended
Community Sub-Types
2.3. Registry: Generic Transitive Experimental Use Extended
Community Part 2 Sub-Types
2.4. Registry: Generic Transitive Experimental Use Extended
Community Part 3 Sub-Types
3. Security Considerations
4. References
4.1. Normative References
4.2. Informative References
Acknowledgements
Author's Address
1. Introduction
The IANA registries for the type values and sub-type values of the
BGP Extended Communities attribute were reorganized by [RFC7153]. As
a result, IANA maintains a registry entitled "BGP Transitive Extended
Community Types", which includes a range of type values (0x80-0x8F)
reserved for Experimental Use [RFC8126]. Out of this experimental
range, types 0x80, 0x81, and 0x82 have been used in [RFC5575] and
[RFC7674] (both documents were rendered obsolete by [RFC8955]). The
primary use for those types and the sub-type registries is non-
experimental.
Section 2 describes updates to the registry to reflect the actual use
of those code points by changing the registration procedure from
"Experimental Use" to "First Come First Served" [RFC8126] for the
types 0x80-0x82 (and removing "Experimental Use" from the sub-type
registry names), thereby updating [RFC7153] and [RFC8955].
2. IANA Considerations
2.1. Registry: BGP Transitive Extended Community Types
IANA maintains a registry entitled "BGP Transitive Extended Community
Types". IANA has added RFC 9184 to the reference of this registry.
They have also updated the name of the type values according to
Table 1 and added RFC 9184 as a reference for the existing entries.
+=======+==============================================+===========+
| Type | Name | Reference |
| Value | | |
+=======+==============================================+===========+
| 0x80 | Generic Transitive Extended Community (Sub- | RFC 9184 |
| | Types are defined in the "Generic Transitive | |
| | Extended Community Sub-Types" registry) | |
+-------+----------------------------------------------+-----------+
| 0x81 | Generic Transitive Extended Community Part 2 | RFC 9184 |
| | (Sub-Types are defined in the "Generic | |
| | Transitive Extended Community Part 2 Sub- | |
| | Types" registry) | |
+-------+----------------------------------------------+-----------+
| 0x82 | Generic Transitive Extended Community Part 3 | RFC 9184 |
| | (Sub-Types are defined in the "Generic | |
| | Transitive Extended Community Part 3 Sub- | |
| | Types" registry) | |
+-------+----------------------------------------------+-----------+
Table 1: Registry: BGP Transitive Extended Community Types
Furthermore, IANA has changed the registration procedures of this
registry for type values 0x80 through 0x82 to First Come First Served
[RFC8126]. The resulting registration procedures should read as in
Table 2.
+===========+===============================================+
| Range | Registration Procedures |
+===========+===============================================+
| 0x00-0x3f | First Come First Served |
+-----------+-----------------------------------------------+
| 0x80-0x82 | First Come First Served (see RFC 9184) |
+-----------+-----------------------------------------------+
| 0x83-0x8f | Reserved for Experimental Use (see [RFC3692]) |
+-----------+-----------------------------------------------+
| 0x90-0xbf | Standards Action |
+-----------+-----------------------------------------------+
Table 2: Registration Procedures: BGP Transitive Extended
Community Types
2.2. Registry: Generic Transitive Experimental Use Extended Community
Sub-Types
IANA maintains a registry entitled "Generic Transitive Experimental
Use Extended Community Sub-Types". IANA has added RFC 9184 to the
reference of this registry and updated the registry title to:
"Generic Transitive Extended Community Sub-Types"
2.3. Registry: Generic Transitive Experimental Use Extended Community
Part 2 Sub-Types
IANA maintains a registry entitled "Generic Transitive Experimental
Use Extended Community Part 2 Sub-Types". IANA has added RFC 9184 to
the reference of this registry and updated the registry title to:
"Generic Transitive Extended Community Part 2 Sub-Types"
2.4. Registry: Generic Transitive Experimental Use Extended Community
Part 3 Sub-Types
IANA maintains a registry entitled "Generic Transitive Experimental
Use Extended Community Part 3 Sub-Types". IANA has added RFC 9184 to
the reference of this registry and updated the registry title to:
"Generic Transitive Extended Community Part 3 Sub-Types"
3. Security Considerations
There are no direct security considerations arising from this
document.
4. References
4.1. Normative References
[RFC7153] Rosen, E. and Y. Rekhter, "IANA Registries for BGP
Extended Communities", RFC 7153, DOI 10.17487/RFC7153,
March 2014, <https://www.rfc-editor.org/info/rfc7153>.
[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>.
4.2. Informative References
[RFC3692] Narten, T., "Assigning Experimental and Testing Numbers
Considered Useful", BCP 82, RFC 3692,
DOI 10.17487/RFC3692, January 2004,
<https://www.rfc-editor.org/info/rfc3692>.
[RFC5575] Marques, P., Sheth, N., Raszuk, R., Greene, B., Mauch, J.,
and D. McPherson, "Dissemination of Flow Specification
Rules", RFC 5575, DOI 10.17487/RFC5575, August 2009,
<https://www.rfc-editor.org/info/rfc5575>.
[RFC7674] Haas, J., Ed., "Clarification of the Flowspec Redirect
Extended Community", RFC 7674, DOI 10.17487/RFC7674,
October 2015, <https://www.rfc-editor.org/info/rfc7674>.
[RFC8955] Loibl, C., Hares, S., Raszuk, R., McPherson, D., and M.
Bacher, "Dissemination of Flow Specification Rules",
RFC 8955, DOI 10.17487/RFC8955, December 2020,
<https://www.rfc-editor.org/info/rfc8955>.
Acknowledgements
The author wants to thank Alvaro Retana, who pointed out that the
IANA registry contains misleading entries in this context.
Author's Address
Christoph Loibl
next layer Telekom GmbH
Mariahilfer Guertel 37/7
1150 Vienna
Austria
Phone: +43 664 1176414
Email: cl@tix.at