Pre-standard Linear Protection Switching in MPLS-TP
draft-zulr-mpls-tp-linear-protection-switching-10
MPLS Working Group H. van Helvoort, Ed.
Internet-Draft Huawei Technologies
Intended status: Informational J. Ryoo, Ed.
Expires: August 7, 2014 ETRI
H. Zhang
Huawei Technologies
F. Huang
Philips
H. Li
China Mobile
A. D'Alessandro
Telecom Italia
February 3, 2014
Pre-standard Linear Protection Switching in MPLS-TP
draft-zulr-mpls-tp-linear-protection-switching-10.txt
Abstract
The IETF Standards Track solution for MPLS Transport Profile (MPLS-
TP) Linear Protection is provided in RFC 6378, draft-ietf-mpls-psc-
updates and draft-ietf-mpls-tp-psc-itu.
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 MPLS-TP data plane, and can work without any
control plane.
[Editor's note] To be included in "Status of Memo": This document is
not an Internet Standards Track specification; it is published for
informational purposes.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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Task Force (IETF). Note that other groups may also distribute
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Drafts is at http://datatracker.ietf.org/drafts/current/.
van Helvoort, et al. Expires August 7, 2014 [Page 1]
Internet-Draft Pre-standard MPLS-TP Lin. Prot. Switching February 2014
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions Used in This Document . . . . . . . . . . . . . . 4
3. Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Linear protection switching overview . . . . . . . . . . . . 5
4.1. Protection architecture types . . . . . . . . . . . . . . 5
4.1.1. 1+1 architecture . . . . . . . . . . . . . . . . . . 5
4.1.2. 1:1 architecture . . . . . . . . . . . . . . . . . . 6
4.1.3. 1:n architecture . . . . . . . . . . . . . . . . . . 6
4.2. Protection switching type . . . . . . . . . . . . . . . . 6
4.3. Protection operation type . . . . . . . . . . . . . . . . 7
5. Protection switching trigger conditions . . . . . . . . . . . 7
5.1. Fault conditions . . . . . . . . . . . . . . . . . . . . 7
5.2. External commands . . . . . . . . . . . . . . . . . . . . 8
5.2.1. End-to-end commands . . . . . . . . . . . . . . . . . 8
5.2.2. Local commands . . . . . . . . . . . . . . . . . . . 8
6. Protection switching schemes . . . . . . . . . . . . . . . . 9
6.1. 1+1 unidirectional protection switching . . . . . . . . . 9
6.2. 1+1 bidirectional protection switching . . . . . . . . . 10
6.3. 1:1 bidirectional protection switching . . . . . . . . . 11
7. APS protocol . . . . . . . . . . . . . . . . . . . . . . . . 12
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