Y.1541-QOSM: Model for Networks Using Y.1541 Quality-of-Service Classes
RFC 5976
Internet Engineering Task Force (IETF) G. Ash
Request for Comments: 5976 A. Morton
Category: Experimental M. Dolly
ISSN: 2070-1721 P. Tarapore
C. Dvorak
AT&T Labs
Y. El Mghazli
Alcatel-Lucent
October 2010
Y.1541-QOSM: Model for Networks Using Y.1541 Quality-of-Service Classes
Abstract
This document describes a QoS-NSLP Quality-of-Service model (QOSM)
based on ITU-T Recommendation Y.1541 Network QoS Classes and related
guidance on signaling. Y.1541 specifies 8 classes of Network
Performance objectives, and the Y.1541-QOSM extensions include
additional QSPEC parameters and QOSM processing guidelines.
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/rfc5976.
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Ash, et al. Experimental [Page 1]
RFC 5976 Y.1541 QOSM October 2010
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. Summary of ITU-T Recommendations Y.1541 and Signaling
Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Description of Y.1541 Classes . . . . . . . . . . . . . . 4
2.2. Y.1541-QOSM Processing Requirements . . . . . . . . . . . 6
3. Additional QSPEC Parameters for Y.1541 QOSM . . . . . . . . . 7
3.1. Traffic Model (TMOD) Extension Parameter . . . . . . . . . 7
3.2. Restoration Priority Parameter . . . . . . . . . . . . . . 8
4. Y.1541-QOSM Considerations and Processing Example . . . . . . 10
4.1. Deployment Considerations . . . . . . . . . . . . . . . . 10
4.2. Applicable QSPEC Procedures . . . . . . . . . . . . . . . 10
4.3. QNE Processing Rules . . . . . . . . . . . . . . . . . . . 10
4.4. Processing Example . . . . . . . . . . . . . . . . . . . . 10
4.5. Bit-Level QSPEC Example . . . . . . . . . . . . . . . . . 12
4.6. Preemption Behavior . . . . . . . . . . . . . . . . . . . 14
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14
5.1. Assignment of QSPEC Parameter IDs . . . . . . . . . . . . 14
5.2. Restoration Priority Parameter Registry . . . . . . . . . 14
5.2.1. Restoration Priority Field . . . . . . . . . . . . . . 14
5.2.2. Time to Restore Field . . . . . . . . . . . . . . . . 15
5.2.3. Extent of Restoration Field . . . . . . . . . . . . . 15
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