Revision to Capability Codes Registration Procedures
draft-ietf-idr-capabilities-registry-change-03

Document Type Active Internet-Draft (idr WG)
Last updated 2018-11-15
Replaces draft-scudder-idr-capabilities-registry-change
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Network Working Group                                         J. Scudder
Internet-Draft                                          Juniper Networks
Updates: 5492 (if approved)                            November 15, 2018
Intended status: Standards Track
Expires: May 19, 2019

          Revision to Capability Codes Registration Procedures
           draft-ietf-idr-capabilities-registry-change-03.txt

Abstract

   This document updates RFC 5492 by making a change to the registration
   procedures for BGP Capability Codes.  Specifically, the range
   formerly designated "Reserved for Private Use" is divided into three
   new ranges, respectively designated as "First Come First Served",
   "Experimental" and "Reserved".

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on May 19, 2019.

Copyright Notice

   Copyright (c) 2018 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 Simplified BSD License text as described in Section 4.e of

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Internet-Draft  Capability Codes Registration Procedures   November 2018

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Discussion  . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   4
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   4
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   4
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   [RFC5492] designates the range of Capability Codes 128-255 as
   "Reserved for Private Use".  Subsequent experience has shown this to
   be not only useless, but actively confusing to implementors.  BGP
   Capability Codes do not meet the criteria for "Private Use" described
   in [RFC8126] section 4.1.  An example of a legitimate "private use"
   code point might be a BGP community [RFC1997] value assigned for use
   within a given Autonomous System, but no analogous use of
   Capabilities exists.

   Accordingly, this document revises the registration procedures for
   the range 128-255, as follows, using the terminology defined in
   [RFC8126]:

   o  128-238: First Come First Served
   o  239-254: Experimental Use
   o  255: Reserved

   The procedures for the ranges 1-63 and 64-127 are unchanged,
   remaining "IETF Review" and "First Come First Served" respectively.

2.  Discussion

   The reason for providing an Experimental Use range is to preserve a
   range for use during early development.  Although there are few
   practical differences between Experimental and Private Use, the
   change both makes it clear that code points from this space should
   not be used long-term or in shipping products, and reduces the
   consumption of the scarce Capability Code space expended for this
   purpose.  Once classified as Experimental, it should be considered
   difficult to reclassify the space for some other purpose in the
   future.

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   The reason for reserving the maximum value is that it may be useful
   in the future if extension of the number space is needed.

   The reason for designating "IESG" as the change controller for all
   registrations is that while it should be easy to obtain a Capability
   Code, once registered it's not a trivial matter to safely and
   interoperably change the use of that code, and thus working group
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