Mtrace Version 2: Traceroute Facility for IP Multicast
RFC 8487
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
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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
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