Residence Time Measurement in MPLS Networks
RFC 8169

Document Type RFC - Proposed Standard (May 2017; No errata)
Last updated 2017-05-31
Replaces draft-mirsky-mpls-residence-time
Stream IETF
Formats plain text pdf html bibtex
Reviews
Stream WG state Submitted to IESG for Publication
Document shepherd Loa Andersson
Shepherd write-up Show (last changed 2017-01-09)
IESG IESG state RFC 8169 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Deborah Brungard
Send notices to "Loa Andersson" <loa@pi.nu>
IANA IANA review state IANA OK - Actions Needed
IANA action state RFC-Ed-Ack
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

Abstract

   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

   Copyright (c) 2017 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.

Mirsky, et al.               Standards Track                    [Page 2]
RFC 8169               Residence Time Measurement               May 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
     1.1.  Conventions Used in This Document . . . . . . . . . . . .   4
       1.1.1.  Terminology . . . . . . . . . . . . . . . . . . . . .   4
       1.1.2.  Requirements Language . . . . . . . . . . . . . . . .   5
   2.  Residence Time Measurement  . . . . . . . . . . . . . . . . .   5
     2.1.  One-Step Clock and Two-Step Clock Modes . . . . . . . . .   6
       2.1.1.  RTM with Two-Step Upstream PTP Clock  . . . . . . . .   7
       2.1.2.  Two-Step RTM with One-Step Upstream PTP Clock . . . .   8
   3.  G-ACh for Residence Time Measurement  . . . . . . . . . . . .   8
     3.1.  PTP Packet Sub-TLV  . . . . . . . . . . . . . . . . . . .  10
     3.2.  PTP Associated Value Field  . . . . . . . . . . . . . . .  11
   4.  Control-Plane Theory of Operation . . . . . . . . . . . . . .  11
     4.1.  RTM Capability  . . . . . . . . . . . . . . . . . . . . .  11
     4.2.  RTM Capability Sub-TLV  . . . . . . . . . . . . . . . . .  12
     4.3.  RTM Capability Advertisement in Routing Protocols . . . .  13
       4.3.1.  RTM Capability Advertisement in OSPFv2  . . . . . . .  13
       4.3.2.  RTM Capability Advertisement in OSPFv3  . . . . . . .  14
       4.3.3.  RTM Capability Advertisement in IS-IS . . . . . . . .  14
       4.3.4.  RTM Capability Advertisement in BGP-LS  . . . . . . .  14
     4.4.  RSVP-TE Control-Plane Operation to Support RTM  . . . . .  15
       4.4.1.  RTM_SET TLV . . . . . . . . . . . . . . . . . . . . .  16
   5.  Data-Plane Theory of Operation  . . . . . . . . . . . . . . .  20
   6.  Applicable PTP Scenarios  . . . . . . . . . . . . . . . . . .  21
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  22
Show full document text