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Dual-Homing Protection for MPLS and the MPLS Transport Profile (MPLS-TP) Pseudowires (RFC8184) Disclosure Number: IPCOM000250308D
Original Publication Date: 2017-Jun-01
Included in the Prior Art Database: 2017-Jun-27
Document File: 22 page(s) / 24K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

W. Cheng: AUTHOR [+5]


[RFC6372] and [RFC6378] describe the framework and mechanism of MPLS Transport Profile (MPLS-TP) linear protection, which can provide protection for the MPLS Label Switched Path (LSP) or pseudowire (PW) between the edge nodes. This mechanism does not protect against failure of the Attachment Circuit (AC) or the Provider Edge (PE) node. [RFC6718] and [RFC6870] describe the framework and mechanism for PW redundancy to provide protection against AC or PE node failure. The PW redundancy mechanism is based on the signaling of the Label Distribution Protocol (LDP), which is applicable to PWs with a dynamic control plane. [RFC8104] describes a fast local repair mechanism for PW egress endpoint failures, which is based on PW redundancy, upstream label assignment, and context-specific label switching. The mechanism defined in [RFC8104] is only applicable to PWs with a dynamic control plane.

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Internet Engineering Task Force (IETF)                          W. Cheng Request for Comments: 8184                                       L. Wang Category: Informational                                            H. Li ISSN: 2070-1721                                             China Mobile                                                                S. Davari                                                     Broadcom Corporation                                                                  J. Dong                                                      Huawei Technologies                                                                June 2017

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


   This document describes a framework and several scenarios for a    pseudowire (PW) dual-homing local protection mechanism that avoids    unnecessary switchovers and does not depend on whether a control    plane is used.  A Dual-Node Interconnection (DNI) PW is used to carry    traffic between the dual-homing Provider Edge (PE) nodes when a    failure occurs in one of the Attachment Circuits (AC) or PWs.  This    PW dual-homing local protection mechanism is complementary to    existing PW protection mechanisms.

Status of This Memo

   This document is not an Internet Standards Track specification; it is    published for informational purposes.

   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).  Not all documents    approved by the IESG are a candidate for any level of Internet    Standard; see 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.                 Informational                     [Page 1]
 RFC 8184                Dual-Homing PW Protection              June 2017

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   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents