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Residence Time Measurement in MPLS Networks (RFC8169)

IP.com Disclosure Number: IPCOM000250106D
Original Publication Date: 2017-May-01
Included in the Prior Art Database: 2017-Nov-05
Document File: 60 page(s) / 67K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

G. Mirsky: AUTHOR [+6]


Time synchronization protocols, e.g., the Network Time Protocol version 4 (NTPv4) [RFC5905] and the Precision Time Protocol version 2 (PTPv2) [IEEE.1588], define timing messages that can be used to synchronize clocks across a network domain. Measurement of the cumulative time that one of these timing messages spends transiting the nodes on the path from ingress node to egress node is termed "residence time" and is used to improve the accuracy of clock synchronization. Residence time is the sum of the difference between the time of receipt at an ingress interface and the time of transmission from an egress interface for each node along the network path from an ingress node to an egress node. This document defines a new Generic Associated Channel (G-ACh) value and an associated Residence Time Measurement (RTM) message that can be used in a Multiprotocol Label Switching (MPLS) network to measure residence time over a Label Switched Path (LSP).

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Internet Engineering Task Force (IETF)                         G. Mirsky Request for Comments: 8169                                     ZTE Corp. Category: Standards Track                                     S. Ruffini ISSN: 2070-1721                                                  E. Gray                                                                 Ericsson                                                                 J. Drake                                                         Juniper Networks                                                                S. Bryant                                                                   Huawei                                                            A. Vainshtein                                                              ECI Telecom                                                                 May 2017

               Residence Time Measurement in MPLS Networks


   This document specifies a new Generic Associated Channel (G-ACh) for    Residence Time Measurement (RTM) and describes how it can be used by    time synchronization protocols within an MPLS domain.

   Residence time is the variable part of the propagation delay of    timing and synchronization messages; knowing this delay for each    message allows for a more accurate determination of the delay to be    taken into account when applying the value included in a Precision    Time Protocol event message.

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 7841.

   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/rfc8169.

 Mirsky, et al.               Standards Track                    [Page 1]
 RFC 8169               Residence Time Measurement               May 2017

 Copyright Notice

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