MPLS Transport Profile (MPLS-TP) Linear Protection to Match the Operational Expectations of Synchronous Digital Hierarchy, Optical Transport Network, and Ethernet Transport Network Operators
RFC 7271
| Document | Type |
RFC - Proposed Standard
(June 2014; No errata)
Updated by RFC 8234
Updates RFC 6378
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-ryoogray-mpls-tp-psc-itu | ||
| 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 2014-02-09) | ||
| IESG | IESG state | RFC 7271 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Adrian Farrel | ||
| Send notices to | (None) | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) J. Ryoo, Ed.
Request for Comments: 7271 ETRI
Updates: 6378 E. Gray, Ed.
Category: Standards Track Ericsson
ISSN: 2070-1721 H. van Helvoort
Huawei Technologies
A. D'Alessandro
Telecom Italia
T. Cheung
ETRI
E. Osborne
June 2014
MPLS Transport Profile (MPLS-TP) Linear Protection to Match the
Operational Expectations of Synchronous Digital Hierarchy,
Optical Transport Network, and Ethernet Transport Network Operators
Abstract
This document describes alternate mechanisms to perform some of the
functions of MPLS Transport Profile (MPLS-TP) linear protection
defined in RFC 6378, and also defines additional mechanisms. The
purpose of these alternate and additional mechanisms is to provide
operator control and experience that more closely models the behavior
of linear protection seen in other transport networks.
This document also introduces capabilities and modes for linear
protection. A capability is an individual behavior, and a mode is a
particular combination of capabilities. Two modes are defined in
this document: Protection State Coordination (PSC) mode and Automatic
Protection Switching (APS) mode.
This document describes the behavior of the PSC protocol including
priority logic and state machine when all the capabilities associated
with the APS mode are enabled.
This document updates RFC 6378 in that the capability advertisement
method defined here is an addition to that document.
Ryoo, et al. Standards Track [Page 1]
RFC 7271 MPLS-TP LP for ITU-T June 2014
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/rfc7271.
Copyright Notice
Copyright (c) 2014 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. Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4. Capability 1: Priority Modification . . . . . . . . . . . . . 6
4.1. Motivation for Swapping Priorities of FS and SF-P . . . . 6
4.2. Motivation for Raising the Priority of SFc . . . . . . . 7
4.3. Motivation for Introducing the Freeze Command . . . . . . 7
4.4. Procedures in Support of Priority Modification . . . . . 8
5. Capability 2: Non-revertive Behavior Modification . . . . . . 8
6. Capability 3: Support of the MS-W Command . . . . . . . . . . 8
6.1. Motivation for adding MS-W . . . . . . . . . . . . . . . 8
6.2. Terminology to Support MS-W . . . . . . . . . . . . . . . 9
6.3. Behavior of MS-P and MS-W . . . . . . . . . . . . . . . . 9
6.4. Equal-Priority Resolution for MS . . . . . . . . . . . . 10
7. Capability 4: Support of Protection against SD . . . . . . . 10
7.1. Motivation for Supporting Protection against SD . . . . . 10
7.2. Terminology to Support SD . . . . . . . . . . . . . . . . 10
Ryoo, et al. Standards Track [Page 2]
RFC 7271 MPLS-TP LP for ITU-T June 2014
7.3. Behavior of Protection against SD . . . . . . . . . . . . 11
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