QSPEC Template for the Quality-of-Service NSIS Signaling Layer Protocol (NSLP)
RFC 5975

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Internet Engineering Task Force (IETF)                       G. Ash, Ed.
Request for Comments: 5975                                          AT&T
Category: Experimental                                     A. Bader, Ed.
ISSN: 2070-1721                                                 Ericsson
                                                         C. Kappler, Ed.
                                                  ck technology concepts
                                                            D. Oran, Ed.
                                                     Cisco Systems, Inc.
                                                            October 2010

                             QSPEC Template
    for the Quality-of-Service NSIS Signaling Layer Protocol (NSLP)

Abstract

   The Quality-of-Service (QoS) NSIS signaling layer protocol (NSLP) is
   used to signal QoS reservations and is independent of a specific QoS
   model (QOSM) such as IntServ or Diffserv.  Rather, all information
   specific to a QOSM is encapsulated in a separate object, the QSPEC.
   This document defines a template for the QSPEC including a number of
   QSPEC parameters.  The QSPEC parameters provide a common language to
   be reused in several QOSMs and thereby aim to ensure the
   extensibility and interoperability of QoS NSLP.  While the base
   protocol is QOSM-agnostic, the parameters that can be carried in the
   QSPEC object are possibly closely coupled to specific models.  The
   node initiating the NSIS signaling adds an Initiator QSPEC, which
   indicates the QSPEC parameters that must be interpreted by the
   downstream nodes less the reservation fails, thereby ensuring the
   intention of the NSIS initiator is preserved along the signaling
   path.

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.

Ash, et al.                   Experimental                      [Page 1]
RFC 5975                 QoS NSLP QSPEC Template            October 2010

   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/rfc5975.

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
   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.

Ash, et al.                   Experimental                      [Page 2]
RFC 5975                 QoS NSLP QSPEC Template            October 2010

Table of Contents

   1. Introduction ....................................................4
      1.1. Conventions Used in This Document ..........................6
   2. Terminology .....................................................6
   3. QSPEC Framework .................................................7
      3.1. QoS Models .................................................7
      3.2. QSPEC Objects ..............................................9
      3.3. QSPEC Parameters ..........................................11
           3.3.1. Traffic Model Parameter ............................12
           3.3.2. Constraints Parameters .............................14
           3.3.3. Traffic-Handling Directives ........................16
           3.3.4. Traffic Classifiers ................................17
      3.4. Example of QSPEC Processing ...............................17
   4. QSPEC Processing and Procedures ................................20
      4.1. Local QSPEC Definition and Processing .....................20
      4.2. Reservation Success/Failure, QSPEC Error Codes,
           and INFO-SPEC Notification ................................23
           4.2.1. Reservation Failure and Error E Flag ...............24
           4.2.2. QSPEC Parameter Not Supported N Flag ...............25
           4.2.3. INFO-SPEC Coding of Reservation Outcome ............25
           4.2.4. QNE Generation of a RESPONSE Message ...............26