Pre-Congestion Notification (PCN) Boundary-Node Behavior for the Single Marking (SM) Mode of Operation
RFC 6662
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Type |
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RFC - Experimental
(July 2012; No errata)
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Last updated |
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2015-10-14
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IETF
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plain text
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html
bibtex
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WG state
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WG Document
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Document shepherd |
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Steven Blake
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| IESG |
IESG state |
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RFC 6662 (Experimental)
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Consensus Boilerplate |
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Unknown
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Responsible AD |
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Martin Stiemerling
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IESG note |
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Steven Blake (slblake@petri-meat.com) is the document shepherd.
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Send notices to |
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(None)
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Internet Engineering Task Force (IETF) A. Charny
Request for Comments: 6662
Category: Experimental J. Zhang
ISSN: 2070-1721 Cisco Systems
G. Karagiannis
University of Twente
M. Menth
University of Tuebingen
T. Taylor, Ed.
Huawei Technologies
July 2012
Pre-Congestion Notification (PCN) Boundary-Node Behavior
for the Single Marking (SM) Mode of Operation
Abstract
Pre-Congestion Notification (PCN) is a means for protecting the
quality of service for inelastic traffic admitted to a Diffserv
domain. The overall PCN architecture is described in RFC 5559. This
memo is one of a series describing possible boundary-node behaviors
for a PCN-domain. The behavior described here is that for a form of
measurement-based load control using two PCN marking states: not-
marked and excess-traffic-marked. This behavior is known informally
as the Single Marking (SM) PCN-boundary-node behavior.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for examination, experimental implementation, and
evaluation.
This document defines an Experimental Protocol for the Internet
community. 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 5741.
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/rfc6662.
Charny, et al. Experimental [Page 1]
RFC 6662 PCN SM Boundary-Node Behavior July 2012
Copyright Notice
Copyright (c) 2012 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.
Charny, et al. Experimental [Page 2]
RFC 6662 PCN SM Boundary-Node Behavior July 2012
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 5
2. [SM-Specific] Assumed Core Network Behavior for SM . . . . . . 8
3. Node Behaviors . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2. Behavior of the PCN-Egress-Node . . . . . . . . . . . . . 9
3.2.1. Data Collection . . . . . . . . . . . . . . . . . . . 9
3.2.2. Reporting the PCN Data . . . . . . . . . . . . . . . . 10
3.2.3. Optional Report Suppression . . . . . . . . . . . . . 10
3.3. Behavior at the Decision Point . . . . . . . . . . . . . . 11
3.3.1. Flow Admission . . . . . . . . . . . . . . . . . . . . 11
3.3.2. Flow Termination . . . . . . . . . . . . . . . . . . . 12
3.3.3. Decision Point Action for Missing
PCN-Boundary-Node Reports . . . . . . . . . . . . . . 14
3.4. Behavior of the Ingress Node . . . . . . . . . . . . . . . 15
3.5. Summary of Timers and Associated Configurable Durations . 15
3.5.1. Recommended Values for the Configurable Durations . . 17
4. Specification of Diffserv Per-Domain Behavior . . . . . . . . 17
4.1. Applicability . . . . . . . . . . . . . . . . . . . . . . 17
4.2. Technical Specification . . . . . . . . . . . . . . . . . 18
4.2.1. Classification and Traffic Conditioning . . . . . . . 18
4.2.2. PHB Configuration . . . . . . . . . . . . . . . . . . 18
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