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Bidirectional Forwarding Detection (BFD) for MPLS Label Switched Paths (LSPs) (RFC5884)

IP.com Disclosure Number: IPCOM000196369D
Original Publication Date: 2010-Jun-01
Included in the Prior Art Database: 2010-Jun-02
Document File: 24 page(s) / 28K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Aggarwal: AUTHOR [+4]

Abstract

One desirable application of Bidirectional Forwarding Detection (BFD) is to track the liveness of a Multiprotocol Label Switching (MPLS) Label Switched Path (LSP). In particular, BFD can be used to detect a data plane failure in the forwarding path of an MPLS LSP. LSP Ping [RFC4379] is an existing mechanism for detecting MPLS LSP data plane failures and for verifying the MPLS LSP data plane against the control plane. This document describes the applicability of BFD in relation to LSP Ping for detecting MPLS LSP data plane failures. It also describes procedures for using BFD for detecting MPLS LSP data plane failures.

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Internet Engineering Task Force (IETF)                       R. Aggarwal Request for Comments: 5884                                   K. Kompella Updates: 1122                                           Juniper Networks Category: Standards Track                                      T. Nadeau ISSN: 2070-1721                                                       BT                                                               G. Swallow                                                      Cisco Systems, Inc.                                                                June 2010

                 Bidirectional Forwarding Detection (BFD)                   for MPLS Label Switched Paths (LSPs)

Abstract

   One desirable application of Bidirectional Forwarding Detection (BFD)    is to detect a Multiprotocol Label Switching (MPLS) Label Switched    Path (LSP) data plane failure.  LSP Ping is an existing mechanism for    detecting MPLS data plane failures and for verifying the MPLS LSP    data plane against the control plane.  BFD can be used for the    former, but not for the latter.  However, the control plane    processing required for BFD Control packets is relatively smaller    than the processing required for LSP Ping messages.  A combination of    LSP Ping and BFD can be used to provide faster data plane failure    detection and/or make it possible to provide such detection on a    greater number of LSPs.  This document describes the applicability of    BFD in relation to LSP Ping for this application.  It also describes    procedures for using BFD in this environment.

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    http://www.rfc-editor.org/info/rfc5884.

Aggarwal, et al.             Standards Track                    [Page 1]
 RFC 5884                    BFD for MPLS LSPs                  June 2010

 Copyright Notice

   Copyright (c) 2010 IETF Trust and the persons identified as the    document authors.  All rights reserved.

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