Multicast Listener Discovery Version 2 (MLDv2) for IPv6
RFC 3810
| Document | Type |
RFC - Proposed Standard
(June 2004; Errata)
Updated by RFC 4604
Updates RFC 2710
Was draft-vida-mld-v2 (magma WG)
|
|
|---|---|---|---|
| Last updated | 2016-08-13 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 3810 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Margaret Wasserman | ||
| Send notices to | (None) | ||
Network Working Group R. Vida, Ed.
Request for Comments: 3810 L. Costa, Ed.
Updates: 2710 LIP6
Category: Standards Track June 2004
Multicast Listener Discovery Version 2 (MLDv2) for IPv6
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2004).
Abstract
This document updates RFC 2710, and it specifies Version 2 of the
Multicast Listener Discovery Protocol (MLDv2). MLD is used by an
IPv6 router to discover the presence of multicast listeners on
directly attached links, and to discover which multicast addresses
are of interest to those neighboring nodes. MLDv2 is designed to be
interoperable with MLDv1. MLDv2 adds the ability for a node to
report interest in listening to packets with a particular multicast
address only from specific source addresses or from all sources
except for specific source addresses.
Vida & Costa Standards Track [Page 1]
RFC 3810 MLDv2 for IPv6 June 2004
Table of Contents
1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Protocol Overview . . . . . . . . . . . . . . . . . . . . . . 3
3. The Service Interface for Requesting IP Multicast Reception . 9
4. Multicast Listening State Maintained by Nodes . . . . . . . . 11
5. Message Formats . . . . . . . . . . . . . . . . . . . . . . . 13
6. Protocol Description for Multicast Address Listeners. . . . . 27
7. Protocol Description for Multicast Routers. . . . . . . . . . 34
8. Interoperation with MLDv1 . . . . . . . . . . . . . . . . . . 48
9. List of Timers, Counters, and their Default Values. . . . . . 51
10. Security Considerations . . . . . . . . . . . . . . . . . . . 55
11. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 56
12. References. . . . . . . . . . . . . . . . . . . . . . . . . . 56
13. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 57
Appendix A. Design Rationale. . . . . . . . . . . . . . . . . . . 58
Appendix B. Summary of Changes from MLDv1 . . . . . . . . . . . . 59
Editors' Contact Information. . . . . . . . . . . . . . . . . . . 61
Authors' Addresses. . . . . . . . . . . . . . . . . . . . . . . . 61
Full Copyright Statement. . . . . . . . . . . . . . . . . . . . . 62
1. Introduction
The Multicast Listener Discovery Protocol (MLD) is used by IPv6
routers to discover the presence of multicast listeners (i.e., nodes
that wish to receive multicast packets) on their directly attached
links, and to discover specifically which multicast addresses are of
interest to those neighboring nodes. Note that a multicast router
may itself be a listener of one or more multicast addresses; in this
case it performs both the "multicast router part" and the "multicast
address listener part" of the protocol, to collect the multicast
listener information needed by its multicast routing protocol on the
one hand, and to inform itself and other neighboring multicast
routers of its listening state on the other hand.
This document specifies Version 2 of MLD. The previous version of
MLD is specified in [RFC2710]. In this document we will refer to it
as MLDv1. MLDv2 is a translation of the IGMPv3 protocol [RFC3376]
for IPv6 semantics.
The MLDv2 protocol, when compared to MLDv1, adds support for "source
filtering", i.e., the ability for a node to report interest in
listening to packets *only* from specific source addresses, as
required to support Source-Specific Multicast [RFC3569], or from *all
but* specific source addresses, sent to a particular multicast
address. MLDv2 is designed to be interoperable with MLDv1.
Vida & Costa Standards Track [Page 2]
RFC 3810 MLDv2 for IPv6 June 2004
The capitalized key words "MUST", "MUST NOT", "REQUIRED", "SHALL",
"SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in
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