Diffserv-Interconnection Classes and Practice
RFC 8100
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Type |
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RFC - Informational
(March 2017; No errata)
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Last updated |
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2017-03-09
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Replaces |
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draft-geib-tsvwg-diffserv-intercon
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IETF
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plain text
pdf
html
bibtex
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Reviews |
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WG state
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Submitted to IESG for Publication
(wg milestone:
Jan 2016 - Submit 'DiffServ int...
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Document shepherd |
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Gorry Fairhurst
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Shepherd write-up |
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Show
(last changed 2016-08-23)
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| IESG |
IESG state |
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RFC 8100 (Informational)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Spencer Dawkins
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Send notices to |
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"Gorry Fairhurst" <gorry@erg.abdn.ac.uk>
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| IANA |
IANA review state |
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Version Changed - Review Needed
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IANA action state |
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No IC
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Internet Engineering Task Force (IETF) R. Geib, Ed.
Request for Comments: 8100 Deutsche Telekom
Category: Informational D. Black
ISSN: 2070-1721 Dell EMC
March 2017
Diffserv-Interconnection Classes and Practice
Abstract
This document defines a limited common set of Diffserv Per-Hop
Behaviors (PHBs) and Diffserv Codepoints (DSCPs) to be applied at
(inter)connections of two separately administered and operated
networks, and it explains how this approach can simplify network
configuration and operation. Many network providers operate
Multiprotocol Label Switching (MPLS) using Treatment Aggregates for
traffic marked with different Diffserv Per-Hop Behaviors and use MPLS
for interconnection with other networks. This document offers a
simple interconnection approach that may simplify operation of
Diffserv for network interconnection among providers that use MPLS
and apply the Short Pipe Model. While motivated by the requirements
of MPLS network operators that use Short Pipe Model tunnels, this
document is applicable to other networks, both MPLS and non-MPLS.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
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). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see 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
http://www.rfc-editor.org/info/rfc8100.
Geib & Black Informational [Page 1]
RFC 8100 Diffserv-Intercon March 2017
Copyright Notice
Copyright (c) 2017 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
(http://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
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Related Work . . . . . . . . . . . . . . . . . . . . . . 4
1.2. Applicability Statement . . . . . . . . . . . . . . . . . 5
1.3. Document Organization . . . . . . . . . . . . . . . . . . 5
2. MPLS and Short Pipe Model Tunnels . . . . . . . . . . . . . . 6
3. Relationship to RFC 5127 . . . . . . . . . . . . . . . . . . 7
3.1. Background of RFC 5127 . . . . . . . . . . . . . . . . . 7
3.2. Differences from RFC 5127 . . . . . . . . . . . . . . . . 7
4. The Diffserv-Intercon Interconnection Classes . . . . . . . . 8
4.1. Diffserv-Intercon Example . . . . . . . . . . . . . . . . 11
4.2. End-to-End PHB and DSCP Transparency . . . . . . . . . . 13
4.3. Treatment of Network Control Traffic at Carrier
Interconnection Interfaces . . . . . . . . . . . . . . . 13
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15
6. Security Considerations . . . . . . . . . . . . . . . . . . . 15
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.1. Normative References . . . . . . . . . . . . . . . . . . 16
7.2. Informative References . . . . . . . . . . . . . . . . . 16
Appendix A. The MPLS Short Pipe Model and IP Traffic . . . . . . 18
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 21
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 21
Geib & Black Informational [Page 2]
RFC 8100 Diffserv-Intercon March 2017
1. Introduction
Diffserv has been deployed in many networks; it provides
differentiated traffic forwarding based on the Diffserv Codepoint
(DSCP) field, which is part of the IP header [RFC2474]. This
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