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Label Switched Path (LSP) Data Path Delay Metrics in Generalized MPLS and MPLS Traffic Engineering (MPLS-TE) Networks
RFC 6777

Internet Engineering Task Force (IETF)                       W. Sun, Ed.
Request for Comments: 6777                                          SJTU
Category: Standards Track                                  G. Zhang, Ed.
ISSN: 2070-1721                                                     CATR
                                                                  J. Gao
                                                                  Huawei
                                                                  G. Xie
                                                            UC Riverside
                                                              R. Papneja
                                                                  Huawei
                                                           November 2012

 Label Switched Path (LSP) Data Path Delay Metrics in Generalized MPLS
            and MPLS Traffic Engineering (MPLS-TE) Networks

Abstract

   When setting up a Label Switched Path (LSP) in Generalized MPLS
   (GMPLS) and MPLS Traffic Engineering (MPLS-TE) networks, the
   completion of the signaling process does not necessarily mean that
   the cross-connection along the LSP has been programmed accordingly
   and in a timely manner.  Meanwhile, the completion of the signaling
   process may be used by LSP users or applications that control their
   use as an indication that the data path has become usable.  The
   existence of the inconsistency between the signaling messages and
   cross-connection programming, and the possible failure of cross-
   connection programming, if not properly treated, will result in data
   loss or even application failure.  Characterization of this
   performance can thus help designers to improve the way in which LSPs
   are used and to make applications or tools that depend on and use
   LSPs more robust.  This document defines a series of performance
   metrics to evaluate the connectivity of the data path in the
   signaling process.

Status of This Memo

   This is an Internet Standards Track document.

   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).  Further information on
   Internet Standards is available in 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/rfc6777.

Sun, et al.                  Standards Track                    [Page 1]
RFC 6777               LSP Data Path Delay Metrics         November 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.

Table of Contents

   1. Introduction ....................................................4
   2. Conventions Used in This Document ...............................5
   3. Overview of Performance Metrics .................................5
   4. Terms Used in This Document .....................................6
   5. A Singleton Definition for RRFD .................................7
      5.1. Motivation .................................................7
      5.2. Metric Name ................................................7
      5.3. Metric Parameters ..........................................7
      5.4. Metric Units ...............................................7
      5.5. Definition .................................................8
      5.6. Discussion .................................................8
      5.7. Methodologies ..............................................9
   6. A Singleton Definition for RSRD ................................10
      6.1. Motivation ................................................10
      6.2. Metric Name ...............................................10
      6.3. Metric Parameters .........................................10
      6.4. Metric Units ..............................................11
      6.5. Definition ................................................11
      6.6. Discussion ................................................11
      6.7. Methodologies .............................................12

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