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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

Copyright © 2022 IETF Trust and the persons identified as the document authors. All rights reserved.

This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License.

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