GLOP Addressing in 233/8 (RFC2770)
Original Publication Date: 2000-Feb-01
Included in the Prior Art Database: 2019-Feb-10
Internet Society Requests For Comment (RFCs)
D. Meyer: AUTHOR [+1]
This describes an experimental policy for use of the class D address space using 233/8 as the experimental statically assigned subset of the class D address space. This memo defines an Experimental Protocol for the Internet community.
Network Working Group D. Meyer Request for Comments: 2770 Cisco Systems Category: Experimental P. Lothberg Sprint February 2000
GLOP Addressing in 233/8
Status of this Memo
This memo defines an Experimental Protocol for the Internet community. It does not specify an Internet standard of any kind. Discussion and suggestions for improvement are requested. Distribution of this memo is unlimited.
Copyright (C) The Internet Society (2000). All Rights Reserved.
This describes an experimental policy for use of the class D address space using 233/8 as the experimental statically assigned subset of the class D address space. This new experimental allocation is in addition to those described on [IANA] (e.g. [RFC2365]).
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 <email@example.com> or the authors.
1. Problem Statement
Multicast addresses have traditionally been allocated by a dynamic mechanism such as SDR [SAP]. However, many current multicast deployment models are not amenable to dynamic allocation. For example, many content aggregators require group addresses which are fixed on a time scale which is not amenable to allocation by a mechanism such as described in [SAP]. Perhaps more seriously, since there isn’t general consensus by providers, content aggregators, or application writers as to the allocation mechanism, the Internet is left without a coherent multicast address allocation scheme.
Meyer & Lothberg Experimental [Page 1]
RFC 2770 GLOP Addressing in 233/8 February 2000
The MALLOC working group is looking at a specific strategy for global multicast address allocation [MADCAP, MASC]. This experiment will proceed in parallel. MADCAP may be employed within AS’s, if so desired.
This document proposes an experimental method of statically allocating multicast addresses with global scope. This experiment will last for a period of one year, but may be extended as described in section 6.
2. Address Space
For purposes of the experiment described here, the IANA has allocated 233/8. The remaining 24 bits will be administered in a manner similar to that described in RFC 1797:
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 233 | 16 bits AS | local bits | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Consider, for example, AS 5662. Written in binary, left padded with 0s, we get 0001011000011110. Mapping the high order octet to the second octet of the address, and the low order octet to the third octet, we get 233.22.30/24.
As mentioned above, the allocation proposed here follows the RFC 1797 (case 1) allocation scheme, modified as follows: the high order octet has the value 233, and the next 16 bits are a previously assigned Autonomous System number (AS), as registered by a n...