wdiff rfc8093.original rfc8093.txt


IDR
Internet Engineering Task Force (IETF)                       J. Snijders
Internet-Draft
Request for Comments: 8093                                           NTT
Intended status:
Category: Standards Track                       December 29, 2016
Expires: July 2,                                  February 2017
ISSN: 2070-1721

                   Deprecation of BGP Path Attribute values
                 Values 30, 31, 129, 241, 242, and 243
                 draft-ietf-idr-deprecate-30-31-129-02

Abstract

   This document requests IANA to mark BGP path attribute values 30, 31,
   129, 241, 242, and 243 as "deprecated". "Deprecated".

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on July 2, 2017.
   http://www.rfc-editor.org/info/rfc8093.

Copyright Notice

   Copyright (c) 2016 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   2
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .   2
   4.  Informative References  . . . . . . . . . . . . . . . . . . .   3
   Appendix A.
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .   3
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   3

1.  Introduction

   It has been discovered that certain BGP Path Attribute values have
   been used in BGP implementations which that have been deployed in the wild
   while not being assigned by the IANA for such usage.  Unregistered usage
   of BGP Path Attribute values can lead to deployment problems for new
   technologies.

   The use of these unregistered values was noticed when the BGP Large
   Communities attribute [I-D.ietf-idr-large-community] [RFC8092] was initially assigned value 30 by
   IANA.  It was subsequently discovered that a
   widely-deployed widely deployed BGP-4
   [RFC4271] implementation had released code
   which that used path attribute
   30 and which that applied a "Treat-as-withdraw" [RFC7606] strategy to
   routes containing a valid Large Community attribute, since it was
   expecting a different data structure.  Because these routes were
   dropped, early adopters of Large Communities were unreachable from
   parts of the Internet.  As a workaround, a new Early IANA Allocation
   was requested.

   The squatting of values 30, 31, 129, 241, 242 242, and 243 has been
   confirmed by the involved vendors or through source code review.

2.  IANA Considerations

   Per this document,

   IANA is requested to mark has marked values 30, 31, 129, 241, 242, and 243 as "deprecated" "Deprecated"
   in the "BGP Path Attributes" registry subregistry under the "Border Gateway
   Protocol (BGP) Parameters" group. registry.  The marking "deprecated" meaning "Deprecated" means
   "use is not recommended"
   ([I-D.leiba-cotton-iana-5226bis]). ([IANA-GUIDELINES]).

3.  Security Considerations

   There are no meaningful security consequences arising from this
   registry update.

4.  Informative References

   [I-D.ietf-idr-large-community]
              Heitz, J., Snijders, J., Patel, K., Bagdonas, I., and N.
              Hilliard, "BGP Large Communities", draft-ietf-idr-large-
              community-11 (work in progress), December 2016.

   [I-D.leiba-cotton-iana-5226bis]

   [IANA-GUIDELINES]
              Cotton, M., Leiba, B., and T. Narten, "Guidelines for
              Writing an IANA Considerations Section in RFCs", draft-
              leiba-cotton-iana-5226bis-18 (work Work in progress),
              Progress, draft-leiba-cotton-iana-5226bis-18, September
              2016.

   [RFC4271]  Rekhter, Y., Ed., Li, T., Ed., and S. Hares, Ed., "A
              Border Gateway Protocol 4 (BGP-4)", RFC 4271,
              DOI 10.17487/RFC4271, January 2006,
              <http://www.rfc-editor.org/info/rfc4271>.

   [RFC7606]  Chen, E., Ed., Scudder, J., Ed., Mohapatra, P., and K.
              Patel, "Revised Error Handling for BGP UPDATE Messages",
              RFC 7606, DOI 10.17487/RFC7606, August 2015,
              <http://www.rfc-editor.org/info/rfc7606>.

Appendix A.

   [RFC8092]  Heitz, J., Ed., Snijders, J., Ed., Patel, K., Bagdonas,
              I., and N. Hilliard, "BGP Large Communities Attribute",
              RFC 8092, DOI 10.17487/RFC8092, February 2017,
              <http://www.rfc-editor.org/info/rfc8092>.

Acknowledgements

   The author would like to gratefully acknowledge Marlien Vijfhuizen
   who helped discover the squatting of value 30, and Nick Hilliard for
   editorial feedback.

Author's Address

   Job Snijders
   NTT Communications
   Theodorus Majofskistraat 100
   Amsterdam  1065 SZ
   NL
   The Netherlands

   Email: job@ntt.net