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LDP Extensions for Pseudowire Binding to Label Switched Path (LSP) Tunnels (RFC7965) Disclosure Number: IPCOM000247398D
Original Publication Date: 2016-Aug-01
Included in the Prior Art Database: 2016-Sep-01
Document File: 32 page(s) / 39K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Chen: AUTHOR [+3]


Pseudo Wire Emulation Edge-to-Edge (PWE3) [RFC3985] is a mechanism to emulate Layer 2 services, such as Ethernet Point-to-Point circuits. Such services are emulated between two Attachment Circuits, and the Pseudowire-encapsulated Layer 2 service payload is transported via Packet Switching Network (PSN) tunnels between Provider Edges (PEs). PWE3 typically uses the Label Distribution Protocol (LDP) [RFC5036] or Resource Reservation Protocol - Traffic Engineering (RSVP-TE) [RFC3209] Label Switched Paths (LSPs) as PSN tunnels. The PEs select and bind the Pseudowires to PSN tunnels independently. Today, there is no standardized protocol-based provisioning mechanism to associate PWs with PSN tunnels; such associations must be managed via provisioning or other private methods.

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Internet Engineering Task Force (IETF)                           M. Chen Request for Comments: 7965                                        W. Cao Category: Standards Track                                         Huawei ISSN: 2070-1721                                                A. Takacs                                                                 Ericsson                                                                   P. Pan                                                              August 2016

                      LDP Extensions for Pseudowire               Binding to Label Switched Path (LSP) Tunnels


   Many transport services require that user traffic, in the form of    Pseudowires (PWs), be delivered via either a single co-routed    bidirectional tunnel or two unidirectional tunnels that share the    same routes.  This document defines an optional extension to the    Label Distribution Protocol (LDP) that enables the binding between    PWs and the underlying Traffic Engineering (TE) tunnels.  The    extension applies to both single-segment and multi-segment PWs.

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

 Chen, et al.                 Standards Track                    [Page 1]
 RFC 7965           Explicit PW-to-LSP Tunnels Binding        August 2016

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