Residence Time Measurement in MPLS Networks
RFC 8169
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Type |
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RFC - Proposed Standard
(May 2017; No errata)
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Last updated |
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2018-12-20
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Replaces |
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draft-mirsky-mpls-residence-time
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Stream |
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IETF
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plain text
pdf
html
bibtex
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Reviews |
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Loa Andersson
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Shepherd write-up |
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Show
(last changed 2017-01-09)
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| IESG |
IESG state |
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RFC 8169 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Deborah Brungard
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Send notices to |
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"Loa Andersson" <loa@pi.nu>
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| IANA |
IANA review state |
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IANA OK - Actions Needed
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IANA action state |
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RFC-Ed-Ack
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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
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
7.1. New RTM G-ACh . . . . . . . . . . . . . . . . . . . . . . 22
7.2. New MPLS RTM TLV Registry . . . . . . . . . . . . . . . . 22
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