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Pseudowire Preferential Forwarding Status Bit (RFC6870) Disclosure Number: IPCOM000225621D
Original Publication Date: 2013-Feb-01
Included in the Prior Art Database: 2013-Feb-21
Document File: 70 page(s) / 79K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

P. Muley: AUTHOR [+3]


This document provides the extensions to the Pseudowire (PW) control plane to support the protection schemes of the PW redundancy applications described in RFC 6718, "Pseudowire (PW) Redundancy" [8].

This text was extracted from an ASCII text file.
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Internet Engineering Task Force (IETF)                     P. Muley, Ed. Request for Comments: 6870                              M. Aissaoui, Ed. Updates: 4447                                             Alcatel-Lucent Category: Standards Track                                  February 2013 ISSN: 2070-1721

             Pseudowire Preferential Forwarding Status Bit


   This document describes a mechanism for signaling the active and    standby status of redundant Pseudowires (PWs) between their    termination points.  A set of Redundant PWs is configured between    Provider Edge (PE) nodes in single-segment pseudowire (SS-PW)    applications or between Terminating Provider Edge (T-PE) nodes in    Multi-Segment Pseudowire (MS-PW) applications.

   In order for the PE/T-PE nodes to indicate the preferred PW to use    for forwarding PW packets to one another, a new status bit is    defined.  This bit indicates a Preferential Forwarding status with a    value of active or standby for each PW in a redundant set.

   In addition, a second status bit is defined to allow peer PE nodes to    coordinate a switchover operation of the PW.

   Finally, this document updates RFC 4447 by adding details to the    handling of the PW status code bits in the PW Status TLV.

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 5741.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

Muley & Aissaoui             Standards Track                    [Page 1]
 RFC 6870          PW Preferential Forwarding Status Bit    February 2013

 Copyright Notice

   Copyright (c) 2013 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    ( 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.  Code Components extracted from this document must    include Simplified BSD License text as described in Section 4.e of    the Trust Legal Provisions and are provided without warranty as    described in the Simplified BSD License.

Muley & Aiss...