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Label Switched Path (LSP) Ping and Traceroute Reply Mode Simplification (RFC7737) Disclosure Number: IPCOM000245087D
Original Publication Date: 2016-Jan-01
Included in the Prior Art Database: 2016-Feb-08
Document File: 34 page(s) / 35K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

N. Akiya: AUTHOR [+4]


Multiprotocol Label Switching (MPLS) Label Switched Path (LSP) Ping, as described in [RFC4379], allows an initiator Label Switching Router (LSR) to encode instructions (Reply Mode) on how a responder LSR should send the response back to the initiator LSR. [RFC7110] also allows the initiator LSR to encode a TLV (Reply Path TLV) that can instruct the responder LSR to use a specific LSP to send the response back to the initiator LSR. Both approaches are powerful, as they provide the ability for the initiator LSR to control the return path.

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Internet Engineering Task Force (IETF)                          N. Akiya Request for Comments: 7737                           Big Switch Networks Updates: 7110                                                 G. Swallow Category: Standards Track                                   C. Pignataro ISSN: 2070-1721                                            Cisco Systems                                                             L. Andersson                                                                  M. Chen                                                                   Huawei                                                             January 2016

 Label Switched Path (LSP) Ping and Traceroute Reply Mode Simplification


   The Multiprotocol Label Switching (MPLS) Label Switched Path (LSP)    Ping and Traceroute use the Reply Mode field to signal the method to    be used in the MPLS echo reply.  This document updates the procedures    for the "Reply via Specified Path" Reply Mode.  The value of this    Reply Mode is 5.  The update creates a simple way to indicate that    the reverse LSP should be used as the return path.  This document    also adds an optional TLV that can carry an ordered list of Reply    Mode values.

   This document updates RFC 7110.

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

 Akiya, et al.                Standards Track                    [Page 1]
 RFC 7737           LSP Ping Reply Mode Simplification       January 2016

 Copyright Notice

   Copyright (c) 2016 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 wi...