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authorThomas Voss <mail@thomasvoss.com> 2024-11-27 20:54:24 +0100
committerThomas Voss <mail@thomasvoss.com> 2024-11-27 20:54:24 +0100
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+Network Working Group D. Meyer
+Request for Comments: 3138 Sprint
+Category: Informational June 2001
+
+
+ Extended Assignments in 233/8
+
+Status of this Memo
+
+ This memo provides information for the Internet community. It does
+ not specify an Internet standard of any kind. Distribution of this
+ memo is unlimited.
+
+Copyright Notice
+
+ Copyright (C) The Internet Society (2001). All Rights Reserved.
+
+Abstract
+
+ This memo provides describes the mapping of the GLOP addresses
+ corresponding to the private AS space.
+
+1. Introduction
+
+ RFC 2770 [RFC2770] describes an experimental policy for use of the
+ class D address space using 233/8. The technique described there
+ maps 16 bits of Autonomous System number (AS) into the middle two
+ octets of 233/8 to yield a /24. While this technique has been
+ successful, the assignments are inefficient in those cases in which a
+ /24 is too small or the user doesn't have its own AS.
+
+ RFC 1930 [RFC1930] defines the private AS space to be 64512 through
+ 65535. This memo expands on RFC 2770 to allow routing registries to
+ assign multicast addresses from the GLOP space corresponding to the
+ RFC 1930 private AS space. This space will be referred to as the
+ EGLOP (Extended GLOP) address space.
+
+ This memo is a product of the Multicast Deployment Working Group
+ (MBONED) in the Operations and Management Area of the Internet
+ Engineering Task Force. Submit comments to <mboned@ns.uoregon.edu>
+ or the authors.
+
+ The terms "Specification Required", "Expert Review", "IESG Approval",
+ "IETF Consensus", and "Standards Action", are used in this memo to
+ refer to the processes described in [RFC2434]. The keywords MUST,
+ MUST NOT, MAY, OPTIONAL, REQUIRED, RECOMMENDED, SHALL, SHALL NOT,
+ SHOULD, SHOULD NOT are to be interpreted as defined in RFC 2119
+ [RFC2119].
+
+
+
+Meyer Informational [Page 1]
+
+RFC 3138 Extended Assignments in 233/8 June 2001
+
+
+2. Overview
+
+ http://www.iana.org/assignments/multicast-addresses defines a
+ mechanism for assignment of multicast addresses that are generally
+ for use in network control applications. It is envisioned that those
+ addresses assigned from the EGLOP space (233.252.0.0 -
+ 233.255.255.255) will be used by applications that cannot use
+ Administratively Scoped Addressing [RFC2365], GLOP Addressing
+ [RFC2770], or Source Specific Multicast (Source Specific Multicast,
+ or SSM, is an extension of IP Multicast in which traffic is forwarded
+ to receivers from only those multicast sources for which the
+ receivers have explicitly expressed interest, and is primarily
+ targeted at one-to-many (broadcast) applications).
+
+3. Assignment Criteria
+
+ Globally scoped IPv4 multicast addresses in the EGLOP space are
+ assigned by a Regional Registry (RIR). An applicant MUST, as per
+ [IANA], show that the request cannot be satisfied using
+ Administratively Scoped addressing [RFC2365], GLOP addressing
+ [RFC2770], or SSM. The fine-grained assignment policy is left to the
+ assigning RIR.
+
+4. Security Considerations
+
+ The assignment scheme described in this document does not effect the
+ security properties of the the single source or any source multicast
+ service models.
+
+5. Acknowledgments
+
+ Kurt Kayser, Mirjam Kuehne, Michelle Schipper and Randy Bush provided
+ many insightful comments on earlier versions of this document.
+
+6. Author's Address
+
+ David Meyer
+ Sprint
+ 12502 Sunrise Valley Dr
+ Reston VA, 20191
+
+ EMail: dmm@sprint.net
+
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+Meyer Informational [Page 2]
+
+RFC 3138 Extended Assignments in 233/8 June 2001
+
+
+7. References
+
+ [IANA] http://www.iana.org/assignments/multicast-addresses
+
+ [RFC1930] Hawkinson J. and T. Bates, "Guidelines for
+ creation, selection, and registration of an
+ Autonomous System (AS)", RFC 1930, March 1996.
+
+ [RFC2026] Bradner, S., "The Internet Standards Process --
+ Revision 3", BCP 9, RFC 2026, October 1996.
+
+ [RFC2119] Bradner, S., "Key words for use in RFCs to
+ Indicate Requirement Levels", BCP 14, RFC 2119,
+ March 1997.
+
+ [RFC2365] Meyer, D., "Administratively Scoped IP Multicast",
+ RFC 2365, July 1998.
+
+ [RFC2770] Meyer, D. and P. Lothberg, "GLOP Addressing in
+ 233/8", RFC 2770, February 2000.
+
+ [RFC2780] Bradner, S. and V. Paxson, "IANA Allocation
+ Guidelines For Values In the Internet Protocol
+ and Related Headers", BCP 37, RFC 2780, March
+ 2000.
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+Meyer Informational [Page 3]
+
+RFC 3138 Extended Assignments in 233/8 June 2001
+
+
+Full Copyright Statement
+
+ Copyright (C) The Internet Society (2001). All Rights Reserved.
+
+ This document and translations of it may be copied and furnished to
+ others, and derivative works that comment on or otherwise explain it
+ or assist in its implementation may be prepared, copied, published
+ and distributed, in whole or in part, without restriction of any
+ kind, provided that the above copyright notice and this paragraph are
+ included on all such copies and derivative works. However, this
+ document itself may not be modified in any way, such as by removing
+ the copyright notice or references to the Internet Society or other
+ Internet organizations, except as needed for the purpose of
+ developing Internet standards in which case the procedures for
+ copyrights defined in the Internet Standards process must be
+ followed, or as required to translate it into languages other than
+ English.
+
+ The limited permissions granted above are perpetual and will not be
+ revoked by the Internet Society or its successors or assigns.
+
+ This document and the information contained herein is provided on an
+ "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
+ TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
+ BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
+ HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
+ MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+
+Acknowledgement
+
+ Funding for the RFC Editor function is currently provided by the
+ Internet Society.
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+Meyer Informational [Page 4]
+