draft-ietf-tsvwg-iana-dscp-registry-03.txt   draft-ietf-tsvwg-iana-dscp-registry-04.txt 
Transport Area Working Group G. Fairhurst Transport Area Working Group G. Fairhurst
Internet-Draft University of Aberdeen Internet-Draft University of Aberdeen
Updates: 2474 (if approved) May 07, 2018 Updates: 2474 (if approved) May 08, 2018
Intended status: Standards Track Intended status: Standards Track
Expires: November 06, 2018 Expires: November 07, 2018
IANA Assignment of DSCP Pool 3 (xxxx01) Values to require Publication of IANA Assignment of DSCP Pool 3 (xxxx01) Values to require Publication of
a Standards Track or Best Current Practice RFC a Standards Track or Best Current Practice RFC
draft-ietf-tsvwg-iana-dscp-registry-03 draft-ietf-tsvwg-iana-dscp-registry-04
Abstract Abstract
The Differentiated Services (Diffserv) architecture specifies use of The Differentiated Services (Diffserv) architecture specifies use of
a field in the IPv4 and IPv6 packet headers to carry Diffserv a field in the IPv4 and IPv6 packet headers to carry Diffserv
Codepoint (DSCP) values. The Internet Assigned Numbers Authority Codepoint (DSCP) values. The Internet Assigned Numbers Authority
(IANA) maintains a registry of assigned DSCP values. (IANA) maintains a registry of assigned DSCP values.
This update to RFC2474 changes the IANA assignment method for Pool 3 This update to RFC2474 changes the IANA assignment method for Pool 3
of the registry (i.e., DSCP values of the form xxxx01) to Standards of the registry (i.e., DSCP values of the form xxxx01) to Standards
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on November 06, 2018. This Internet-Draft will expire on November 07, 2018.
Copyright Notice Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the Copyright (c) 2018 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents (http://trustee.ietf.org/ Provisions Relating to IETF Documents (http://trustee.ietf.org/
license-info) in effect on the date of publication of this document. license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights Please review these documents carefully, as they describe your rights
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7.1. Normative References . . . . . . . . . . . . . . . . . . . 5 7.1. Normative References . . . . . . . . . . . . . . . . . . . 5
7.2. Informative References . . . . . . . . . . . . . . . . . . 6 7.2. Informative References . . . . . . . . . . . . . . . . . . 6
Appendix A. Revision Notes . . . . . . . . . . . . . . . . . . . . 6 Appendix A. Revision Notes . . . . . . . . . . . . . . . . . . . . 6
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 7 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 7
1. Introduction 1. Introduction
The Differentiated Services (Diffserv) [RFC2475] architecture The Differentiated Services (Diffserv) [RFC2475] architecture
(updated by [RFC3260]) provides scalable service differentiation in (updated by [RFC3260]) provides scalable service differentiation in
the Internet. Diffserv uses the six most significant bits of the the Internet. Diffserv uses the six most significant bits of the
former IPv4 Type of Service (TOS) octet or the former IPV6 Traffic former IPv4 Type of Service (TOS) octet or the former IPv6 Traffic
Class octet to convey the field, which is used to carry the Diffserv Class octet to convey the field, which is used to carry the Diffserv
Codepoint (DSCP). This DSCP value is used to select a Diffserv Per Codepoint (DSCP). This DSCP value is used to select a Diffserv Per
hop Behaviour, PHB. hop Behaviour, PHB.
The six bit field is capable of conveying 64 distinct codepoints, and The six bit field is capable of conveying 64 distinct codepoints, and
this codepoint space has been divided into three pools for the this codepoint space has been divided into three pools for the
purpose of codepoint assignment and management (as shown in figure purpose of codepoint assignment and management (as shown in figure
1). Pool 1 comprises 32 codepoints [RFC2474]. These are assigned by 1). Pool 1 comprises 32 codepoints [RFC2474]. These are assigned by
Standards Action, as defined in [RFC8126]. Pool 2 comprises a pool Standards Action, as defined in [RFC8126]. Pool 2 comprises a pool
of 16 codepoints reserved for experimental or Local Use (EXP/LU) as of 16 codepoints reserved for experimental or Local Use (EXP/LU) as
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5. IANA Considerations 5. IANA Considerations
This section requests IANA to change the use of Pool 3 in the DSCP This section requests IANA to change the use of Pool 3 in the DSCP
registry and to manage this pool using a Standards Action assignment registry and to manage this pool using a Standards Action assignment
method. method.
This requests IANA to make the following changes to the This requests IANA to make the following changes to the
Differentiated Services field Codepoints (DSCP) Registry, made Differentiated Services field Codepoints (DSCP) Registry, made
available at [Registry]. available at [Registry].
IANA is requested to reference RFC3260 and this current document for
Pool 1.
This update does not modify the IANA registry text for Pool 2. This This update does not modify the IANA registry text for Pool 2. This
pool continues to preserve the note shown in Figure 2. pool continues to preserve the note shown in Figure 2.
The previous registry text: The previous registry text:
3 xxxx01 Experimental or Local Use May be utilized for future 3 xxxx01 Experimental or Local Use May be utilized for future
Standards Action allocations as necessary. Standards Action allocations as necessary.
is replaced with the following registry text: is replaced with the following registry text:
3 xxxx01 Standards Action. 3 xxxx01 Standards Action.
To manage codepoints in Pool 3, IANA is requested to create and To manage codepoints in Pool 3, IANA is requested to create and
maintain a "Pool 3 Codepoints" entry. Pool 3 of the registry is to maintain a "Pool 3 Codepoints" subregistry. Pool 3 of the registry
be created initially empty, with a format identical to that used for is to be created initially empty, with a format identical to that
"Pool 1 Codepoints". used for "Pool 1 Codepoints". IANA is requested to reference RFC3260
and this current document for Pool 3.
The Registration Procedure for use of Pool 3 is "Standards Action" The Registration Procedure for use of Pool 3 is "Standards Action"
[RFC8126]. IANA is expected to normally make assignments from Pool [RFC8126]. IANA is expected to normally make assignments from Pool
1, until this Pool is exhausted, but MAY make assignments from Pool 3 1, until this Pool is exhausted, but MAY make assignments from Pool 3
where the format of the codepoint has properties that are needed for where the format of the codepoint has properties that are needed for
a specific PHB. The required characteristics for choosing the DSCP a specific PHB. The required characteristics for choosing the DSCP
value MUST be explained in the IANA considerations of the document value MUST be explained in the IANA considerations of the document
that requests any assignment from Pool 3 that requests any assignment from Pool 3
IANA is requested to reference RFC3260 and this current document.
6. Acknowledgments 6. Acknowledgments
G. Fairhurst received funding from the European Union's Horizon 2020 G. Fairhurst received funding from the European Union's Horizon 2020
research and innovation program 2014-2018 under grant agreement No. research and innovation program 2014-2018 under grant agreement No.
644334 (NEAT). 644334 (NEAT).
7. References 7. References
7.1. Normative References 7.1. Normative References
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o Fixed exploded acronyms. o Fixed exploded acronyms.
Working Group submission as draft -02 Working Group submission as draft -02
o Corrections after WGLC. o Corrections after WGLC.
Working Group submission as draft -03 Working Group submission as draft -03
o Corrections after TSVWG Shepherd Review. o Corrections after TSVWG Shepherd Review.
Working Group submission as draft -04
o Added RFC 3260 as a necessary downref, with IANA asked to
reference this.
Author's Address Author's Address
Godred Fairhurst Godred Fairhurst
University of Aberdeen University of Aberdeen
Department of Engineering Department of Engineering
Fraser Noble Building Fraser Noble Building
Aberdeen, AB24 3UE Aberdeen, AB24 3UE
Scotland Scotland
Email: gorry@erg.abdn.ac.uk Email: gorry@erg.abdn.ac.uk
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