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Dual-Homing Coordination for MPLS Transport Profile (MPLS-TP) Pseudowires Protection (RFC8185) Disclosure Number: IPCOM000250309D
Original Publication Date: 2017-Jun-01
Included in the Prior Art Database: 2017-Jun-27
Document File: 34 page(s) / 40K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

W. Cheng: AUTHOR [+4]


[RFC6372], [RFC6378], and [RFC7771] describe the framework and mechanism of MPLS Transport Profile (MPLS-TP) linear protection, which can provide protection for the MPLS Label Switched Path (LSP) and pseudowires (PWs) between the edge nodes. These mechanisms cannot protect against the failure of the Attachment Circuit (AC) or the edge nodes. [RFC6718] and [RFC6870] specify the PW redundancy framework and mechanism for protecting the AC or edge node against failure by adding one or more edge nodes, but it requires PW switchover in case of an AC failure; also, PW redundancy relies on Packet Switched Network (PSN) protection mechanisms to protect against the failure of PW.

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Internet Engineering Task Force (IETF)                          W. Cheng Request for Comments: 8185                                       L. Wang Category: Standards Track                                          H. Li ISSN: 2070-1721                                             China Mobile                                                                  J. Dong                                                      Huawei Technologies                                                          A. D'Alessandro                                                           Telecom Italia                                                                June 2017

                         Dual-Homing Coordination       for MPLS Transport Profile (MPLS-TP) Pseudowires Protection


   In some scenarios, MPLS Transport Profile (MPLS-TP) pseudowires (PWs)    (RFC 5921) may be statically configured when a dynamic control plane    is not available.  A fast protection mechanism for MPLS-TP PWs is    needed to protect against the failure of an Attachment Circuit (AC),    the failure of a Provider Edge (PE), or a failure in the Packet    Switched Network (PSN).  The framework and typical scenarios of dual-    homing PW local protection are described in RFC 8184.  This document    proposes a dual-homing coordination mechanism for MPLS-TP PWs that is    used for state exchange and switchover coordination between the dual-    homing PEs for dual-homing PW local protection.

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

Cheng, et al.                Standards Track                    [Page 1]
 RFC 8185        Dual-Homing Coordination for MPLS-TP PWs       June 2017

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