Pre-standard Linear Protection Switching in MPLS Transport Profile (MPLS-TP)
RFC 7347
Document | Type |
RFC - Informational
(September 2014; No errata)
Was draft-zulr-mpls-tp-linear-protection-switching (individual)
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Authors | Huub van Helvoort , Jeong-dong Ryoo , Zhang Haiyan , Feng Huang , Han Li , Alessandro D'Alessandro | ||
Last updated | 2018-12-20 | ||
Stream | ISE | ||
Formats | plain text html pdf htmlized bibtex | ||
IETF conflict review | conflict-review-zulr-mpls-tp-linear-protection-switching | ||
Stream | ISE state | Published RFC | |
Consensus Boilerplate | Unknown | ||
Document shepherd | Adrian Farrel | ||
Shepherd write-up | Show (last changed 2014-02-20) | ||
IESG | IESG state | RFC 7347 (Informational) | |
Telechat date | |||
Responsible AD | (None) | ||
Send notices to | (None) | ||
IANA | IANA review state | IANA OK - No Actions Needed | |
IANA action state | No IANA Actions |
Independent Submission H. van Helvoort, Ed. Request for Comments: 7347 Huawei Technologies Category: Informational J. Ryoo, Ed. ISSN: 2070-1721 ETRI H. Zhang Huawei Technologies F. Huang Philips H. Li China Mobile A. D'Alessandro Telecom Italia September 2014 Pre-standard Linear Protection Switching in MPLS Transport Profile (MPLS-TP) Abstract The IETF Standards Track solution for MPLS Transport Profile (MPLS-TP) Linear Protection is provided in RFCs 6378, 7271, and 7324. This document describes the pre-standard implementation of MPLS-TP Linear Protection that has been deployed by several network operators using equipment from multiple vendors. At the time of publication, these pre-standard implementations were still in operation carrying live traffic. The specified mechanism supports 1+1 unidirectional/bidirectional protection switching and 1:1 bidirectional protection switching. It is purely supported by the MPLS-TP data plane and can work without any control plane. van Helvoort, et al. Informational [Page 1] RFC 7347 Pre-standard MPLS-TP Lin. Prot. Switching September 2014 Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. This is a contribution to the RFC Series, independently of any other RFC stream. The RFC Editor has chosen to publish this document at its discretion and makes no statement about its value for implementation or deployment. Documents approved for publication by the RFC Editor are not a candidate for any level of Internet Standard; see 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/rfc7347. 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. van Helvoort, et al. Informational [Page 2] RFC 7347 Pre-standard MPLS-TP Lin. Prot. Switching September 2014 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Conventions Used in This Document . . . . . . . . . . . . . . 5 3. Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4. Linear Protection-Switching Overview . . . . . . . . . . . . 6 4.1. Protection Architecture Types . . . . . . . . . . . . . . 6 4.1.1. 1+1 Architecture . . . . . . . . . . . . . . . . . . 6 4.1.2. 1:1 Architecture . . . . . . . . . . . . . . . . . . 6 4.1.3. 1:n Architecture . . . . . . . . . . . . . . . . . . 7 4.2. Protection Switching Type . . . . . . . . . . . . . . . . 7 4.3. Protection Operation Type . . . . . . . . . . . . . . . . 7 5. Protection-Switching Trigger Conditions . . . . . . . . . . . 8 5.1. Fault Conditions . . . . . . . . . . . . . . . . . . . . 8 5.2. External Commands . . . . . . . . . . . . . . . . . . . . 8 5.2.1. End-to-End Commands . . . . . . . . . . . . . . . . . 8 5.2.2. Local Commands . . . . . . . . . . . . . . . . . . . 9 6. Protection-Switching Schemes . . . . . . . . . . . . . . . . 10 6.1. 1+1 Unidirectional Protection Switching . . . . . . . . . 10 6.2. 1+1 Bidirectional Protection Switching . . . . . . . . . 11 6.3. 1:1 Bidirectional Protection Switching . . . . . . . . . 12 7. APS Protocol . . . . . . . . . . . . . . . . . . . . . . . . 13 7.1. APS PDU Format . . . . . . . . . . . . . . . . . . . . . 13 7.2. APS Transmission . . . . . . . . . . . . . . . . . . . . 16 7.3. Hold-Off Timer . . . . . . . . . . . . . . . . . . . . . 17 7.4. WTR Timer . . . . . . . . . . . . . . . . . . . . . . . . 17Show full document text