Overview of the Internet Multicast Addressing Architecture
RFC 6308
| Document | Type |
RFC - Informational
(June 2011; No errata)
Obsoletes RFC 2908
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Reviews | |||
| Stream | WG state | WG Document | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 6308 (Informational) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Ron Bonica | ||
| IESG note | Lenny Giuliano (lenny@juniper.net) is the Document Shepherd | ||
| Send notices to | Marshall Eubanks <tme@multicasttech.com>, Hiroshi Ohta <ohta.hiroshi@lab.ntt.co.jp> | ||
Internet Engineering Task Force (IETF) P. Savola
Request for Comments: 6308 CSC/FUNET
Obsoletes: 2908 June 2011
Category: Informational
ISSN: 2070-1721
Overview of the Internet Multicast Addressing Architecture
Abstract
The lack of up-to-date documentation on IP multicast address
allocation and assignment procedures has caused a great deal of
confusion. To clarify the situation, this memo describes the
allocation and assignment techniques and mechanisms currently (as of
this writing) in use.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
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). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see 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
http://www.rfc-editor.org/info/rfc6308.
Copyright Notice
Copyright (c) 2011 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
(http://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.
Savola Informational [Page 1]
RFC 6308 Multicast Address Allocation June 2011
Table of Contents
1. Introduction ....................................................2
1.1. Terminology: Allocation or Assignment ......................3
2. Multicast Address Allocation ....................................3
2.1. Derived Allocation .........................................3
2.1.1. GLOP Allocation .....................................4
2.1.2. Unicast-Prefix-Based Allocation .....................4
2.2. Administratively Scoped Allocation .........................5
2.3. Static IANA Allocation .....................................6
2.4. Dynamic Allocation .........................................6
3. Multicast Address Assignment ....................................6
3.1. Derived Assignment .........................................6
3.2. SSM Assignment inside the Node .............................7
3.3. Manually Configured Assignment .............................7
3.4. Static IANA Assignment .....................................7
3.4.1. Global IANA Assignment ..............................7
3.4.2. Scope-Relative IANA Assignment ......................8
3.5. Dynamic Assignments ........................................8
4. Summary and Future Directions ...................................9
4.1. Prefix Allocation ..........................................9
4.2. Address Assignment ........................................10
4.3. Future Actions ............................................11
5. Acknowledgements ...............................................11
6. IANA Considerations ............................................11
7. Security Considerations ........................................11
8. References .....................................................12
8.1. Normative References ......................................12
8.2. Informative References ....................................13
1. Introduction
Good, up-to-date documentation of IP multicast is close to
non-existent. Particularly, this is an issue with multicast address
allocations (to networks and sites) and assignments (to hosts and
applications). This problem is stressed by the fact that there
exists confusing or misleading documentation on the subject
[RFC2908]. The consequence is that those who wish to learn about IP
multicast and how the addressing works do not get a clear view of the
current situation.
The aim of this document is to provide a brief overview of multicast
addressing and allocation techniques. The term "addressing
architecture" refers to the set of addressing mechanisms and methods
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