Mtrace Version 2: Traceroute Facility for IP Multicast
RFC 8487

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Internet Engineering Task Force (IETF)                         H. Asaeda
Request for Comments: 8487                                          NICT
Category: Standards Track                                       K. Meyer
ISSN: 2070-1721                                                 Dell EMC
                                                             W. Lee, Ed.
                                                            October 2018

         Mtrace Version 2: Traceroute Facility for IP Multicast

Abstract

   This document describes the IP multicast traceroute facility, named
   Mtrace version 2 (Mtrace2).  Unlike unicast traceroute, Mtrace2
   requires special implementations on the part of routers.  This
   specification describes the required functionality in multicast
   routers, as well as how an Mtrace2 client invokes a Query and
   receives a Reply.

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
   https://www.rfc-editor.org/info/rfc8487.

Asaeda, et al.               Standards Track                    [Page 1]
RFC 8487                         Mtrace2                    October 2018

Copyright Notice

   Copyright (c) 2018 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
   (https://trustee.ietf.org/license-info) 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.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Asaeda, et al.               Standards Track                    [Page 2]
RFC 8487                         Mtrace2                    October 2018

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   5
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   7
     2.1.  Definitions . . . . . . . . . . . . . . . . . . . . . . .   7
   3.  Packet Formats  . . . . . . . . . . . . . . . . . . . . . . .   8
     3.1.  Mtrace2 TLV Format  . . . . . . . . . . . . . . . . . . .   9
     3.2.  Defined TLVs  . . . . . . . . . . . . . . . . . . . . . .  10
       3.2.1.  Mtrace2 Query . . . . . . . . . . . . . . . . . . . .  10
       3.2.2.  Mtrace2 Request . . . . . . . . . . . . . . . . . . .  12
       3.2.3.  Mtrace2 Reply . . . . . . . . . . . . . . . . . . . .  12
       3.2.4.  IPv4 Mtrace2 Standard Response Block  . . . . . . . .  13
       3.2.5.  IPv6 Mtrace2 Standard Response Block  . . . . . . . .  18
       3.2.6.  Mtrace2 Augmented Response Block  . . . . . . . . . .  20
       3.2.7.  Mtrace2 Extended Query Block  . . . . . . . . . . . .  21
   4.  Router Behavior . . . . . . . . . . . . . . . . . . . . . . .  22
     4.1.  Receiving an Mtrace2 Query  . . . . . . . . . . . . . . .  22
       4.1.1.  Query Packet Verification . . . . . . . . . . . . . .  22
       4.1.2.  Query Normal Processing . . . . . . . . . . . . . . .  23
     4.2.  Receiving an Mtrace2 Request  . . . . . . . . . . . . . .  23
       4.2.1.  Request Packet Verification . . . . . . . . . . . . .  24
       4.2.2.  Request Normal Processing . . . . . . . . . . . . . .  24
     4.3.  Forwarding Mtrace2 Request  . . . . . . . . . . . . . . .  26
       4.3.1.  Destination Address . . . . . . . . . . . . . . . . .  26
       4.3.2.  Source Address  . . . . . . . . . . . . . . . . . . .  26
       4.3.3.  Appending Standard Response Block . . . . . . . . . .  26
     4.4.  Sending Mtrace2 Reply . . . . . . . . . . . . . . . . . .  27