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IPv6 Router Alert Option for MPLS Operations, Administration, and Maintenance (OAM) (RFC7506) Disclosure Number: IPCOM000241345D
Original Publication Date: 2015-Apr-01
Included in the Prior Art Database: 2015-Apr-18
Document File: 12 page(s) / 11K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

K. Raza: AUTHOR [+3]


A commonly deployed MPLS OAM tool is specified in [RFC4379], "Detecting Multi-Protocol Label Switched (MPLS) Data Plane Failures", which is used to diagnose MPLS network data planes. This specification, often referred to as "MPLS LSP Ping/Traceroute" [RFC4379], requires the use of the Router Alert Option (RAO) in the IP header. For example, Section 4.3 of [RFC4379] states that the IP RAO MUST be set in the IP header of an MPLS Echo Request message. Similarly, Section 4.5 of [RFC4379] states that the IP RAO MUST be set in the IP header of an MPLS Echo Reply message if the Reply Mode in the Echo Request is set to "Reply via an IPv4/IPv6 UDP packet with Router Alert".

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Internet Engineering Task Force (IETF)                           K. Raza Request for Comments: 7506                           Cisco Systems, Inc. Updates: 4379                                                   N. Akiya Category: Standards Track                            Big Switch Networks ISSN: 2070-1721                                             C. Pignataro                                                      Cisco Systems, Inc.                                                               April 2015

                         IPv6 Router Alert Option        for MPLS Operations, Administration, and Maintenance (OAM)


   RFC 4379 defines the MPLS Label Switched Path (LSP) Ping/Traceroute    mechanism in which the Router Alert Option (RAO) MUST be set in the    IP header of the MPLS Echo Request messages and may conditionally be    set in the IP header of the MPLS Echo Reply messages depending on the    Reply Mode used.  While a generic "Router shall examine packet"    Option Value is used for the IPv4 RAO, there is no generic RAO value    defined for IPv6 that can be used.  This document allocates a new,    generic IPv6 RAO value that can be used by MPLS Operations,    Administration, and Maintenance (OAM) tools, including the MPLS Echo    Request and MPLS Echo Reply messages for MPLS in IPv6 environments.    Consequently, it updates RFC 4379.

   The initial motivation to request an IPv6 RAO value for MPLS OAM    comes from the MPLS LSP Ping/Traceroute.  However, this value is    applicable to all MPLS OAM and not limited to MPLS LSP Ping/    Traceroute.

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

Raza, et al.                 Standards Track                    [Page 1]
 RFC 7506               MPLS OAM IPv6 Router Alert             April 2015

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   Copyright (c) 2015 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 Rela...