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 2010Table 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
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