Y.1541-QOSM: Model for Networks Using Y.1541 Quality-of-Service Classes
RFC 5976

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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.

Copyright Notice

   Copyright (c) 2010 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

Ash, et al.                   Experimental                      [Page 1]
RFC 5976                       Y.1541 QOSM                  October 2010

   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
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   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
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   than English.

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